App Context API for Go SDK

This page describes App Context (formerly Objects v2). To upgrade from Objects v1, refer to the migration guide.

App Context provides easy-to-use, serverless storage for user and channel data you need to build innovative, reliable, scalable applications. Use App Context to easily store metadata about your application users and channels, and their membership associations, without the need to stand up your own databases.

PubNub also triggers events when object data is changed: set, updated, or removed from the database. At the same time, making a request to set the same data that already exist, doesn't trigger any event. Clients can receive these events in real time and update their front-end application accordingly.

User

Get Metadata for All Users

Returns a paginated list of UUID Metadata objects, optionally including the custom data object for each.

Method(s)

To Get All UUID Metadata you can use the following method(s) in the Go SDK:

pn.GetAllUUIDMetadata().
    Include([]pubnub.PNUUIDMetadataIncludeCustom).
    Sort(sort).
    Limit(int).
    Count(bool).
    Start(string).
    End(string).
    Filter(string).
    Execute()

* required

Parameter	Description
`Include` Type: []pubnub.PNUUIDMetadataInclude	List of additional/complex UUID attributes to include in response. Omit this parameter if you don't want to retrieve additional attributes. Available values: `pubnub.PNUUIDMetadataIncludeCustom`
`Sort` Type: Array	List of criteria (name of field) which should be used for sorting. Available options are `id`, `name`, and `updated`. Use `asc` or `desc` to specify sort direction. For example: `{name: 'asc'}`
`Limit` Type: int	Number of objects to return in response. Default is `100`, which is also the maximum value.
`Count` Type: bool	Request `Count` to be included in paginated response. By default, `Count` is omitted.
`Start` Type: string	Random string returned from the server, indicating a specific position in a data set. Used for forward pagination, it fetches the next page, allowing you to continue from where you left off.
`End` Type: string	Random string returned from the server, indicating a specific position in a data set. Used for backward pagination, it fetches the previous page, enabling access to earlier data. Ignored if the `Start` parameter is supplied.
`Filter` Type: string	Expression used to filter the results. Only objects whose properties satisfy the given expression are returned. The filter language is defined here. In addition to custom attributes, the expressions can refer to attributes on associated entities one level deep (that is, the association and its target entities).

Basic Usage

Reference code

This example is a self-contained code snippet ready to be run. It includes necessary imports and executes methods with console logging. Use it as a reference when working with other examples in this document.

package main

import (
    "fmt"
    pubnub "github.com/pubnub/go/v7"
)

func main() {
    config := pubnub.NewConfigWithUserId("myUniqueUserId")
    config.SubscribeKey = "demo"
    config.PublishKey = "demo"
    pn := pubnub.NewPubNub(config)

    incl := []pubnub.PNUUIDMetadataInclude{pubnub.PNUUIDMetadataIncludeCustom}

show all 40 lines

Response

The GetAllUUIDMetadata() operation returns a PNGetAllChannelMetadataResponse which contains the following parameters:

Property Name	Type	Description
`Data`	[]PNUUID	Details of type `PNUUID` are here
`TotalCount`	int	Total count of objects without pagination.
`Next`	string	Random string returned from the server, indicating a specific position in a data set. Used for forward pagination, it fetches the next page, allowing you to continue from where you left off.
`Prev`	string	Random string returned from the server, indicating a specific position in a data set. Used for backward pagination, it fetches the previous page, enabling access to earlier data. Ignored if the `Next` parameter is supplied.

Get User Metadata

Returns metadata for the specified UUID, optionally including the custom data object for each.

Method(s)

To Get UUID Metadata you can use the following method(s) in the Go SDK:

pn.PNUUIDMetadataInclude().
    Include([]pubnub.PNUUIDMetadataIncludeCustom).
    Sort(sort).
    ID(string).
    Execute()

* required

Parameter	Description
`Include` Type: []pubnub.PNUUIDMetadataIncludeCustom	List of additional/complex UUID attributes to include in response. Omit this parameter if you don't want to retrieve additional attributes. Available values `pubnub.PNUUIDMetadataIncludeCustom`
`Sort` Type: Array	List of criteria (name of field) which should be used for sorting. Available options are `id`, `name`, and `updated`. Use `asc` or `desc` to specify sort direction. For example: `{name: 'asc'}`
`ID` * Type: string	Unique user identifier. If not supplied then current user's `uuid` is used.

Basic Usage

id := "testuuid"
incl := []pubnub.PNUUIDMetadataInclude{
        pubnub.PNUUIDMetadataIncludeCustom,
    }
res, status, err := pn.GetUUIDMetadata().
    UUID(id).
    Include(incl).
    Execute()
fmt.Println(res, status, err)

Response

The GetUUIDMetadata() operation returns a PNGetUUIDMetadataResponse which contains the following parameters:

Property Name	Type	Description
`Data`	PNUUID	Details of type `PNUUID` are here

Set User Metadata

Unsupported partial updates of custom metadata

The value of the custom metadata parameter sent in this method always overwrites the value stored on PubNub servers. If you want to add new custom data to an existing one, you must:

Get the existing metadata and store it locally.
Append the new custom metadata to the existing one.
Set the entire updated custom object.

Set metadata for a UUID in the database, optionally including the custom data object for each.

Method(s)

To Set UUID Metadata you can use the following method(s) in the Go SDK:

pn.SetUUIDMetadata().
    Include([]pubnub.PNUUIDMetadataIncludeCustom).
    Sort(sort).
    ID(id).
    Name(string).
    ExternalID(string).
    ProfileURL(string).
    Email(string).
    Custom(map[string]interface{}).
    Execute()

* required

Parameter	Description
`Include` Type: []pubnub.PNUUIDMetadataInclude	List of additional/complex UUID attributes to include in response. Omit this parameter if you don't want to retrieve additional attributes. Available values: `pubnub.PNUUIDMetadataIncludeCustom`
`ID` * Type: string	Unique user identifier. If not supplied then current user's `uuid` is used.
`Sort` Type: Array	List of criteria (name of field) which should be used for sorting. Available options are `id`, `name`, and `updated`. Use `asc` or `desc` to specify sort direction. For example: `{name: 'asc'}`
`Name` * Type: string	Display name for the user.
`ExternalID` Type: string	User's identifier in an external system
`ProfileURL` Type: string	The URL of the user's profile picture
`Email` Type: string	The user's email address.
`Custom` Type: map[string]interface	JSON object of key-value pairs with supported data types. App Context filtering language doesn’t support filtering by custom properties.

API limits

To learn about the maximum length of parameters used to set user metadata, refer to REST API docs.

Basic Usage

id := "testuuid"
name := "name"
extid := "extid"
purl := "profileurl"
email := "email"

custom := make(map[string]interface{})
custom["a"] = "b"
custom["c"] = "d"

incl := []pubnub.PNUUIDMetadataInclude{
        pubnub.PNUUIDMetadataIncludeCustom,
    }

res, status, err := pn.SetUUIDMetadata()
show all 24 lines

Response

The SetUUIDMetadata() operation returns a PNSetUUIDMetadataResponse which contains the following parameters:

Property Name	Type	Description
`Data`	PNUUID	Details of type `PNUUID` are here

PNUUID

Property Name	Type	Description
`ID`	string	Unique user identifier. If not supplied then current user's `uuid` is used.
`Name`	string	Display name for the user.
`ExternalID`	string	User's identifier in an external system
`ProfileURL`	string	The URL of the user's profile picture
`Email`	string	The user's email address.
`Custom`	map[string]interface	JSON object of key-value pairs with supported data types.
`Updated`	string	Last updated date.
`ETag`	string	The ETag.

Remove User Metadata

Removes the metadata from a specified UUID.

Method(s)

To Remove UUID Metadata you can use the following method(s) in the Go SDK:

pn.RemoveUUIDMetadata().
    ID(string).
    Execute()

* required

Parameter	Description
`ID` * Type: string	Unique user identifier. If not supplied then current user's `uuid` is used.

Basic Usage

id := "testuuid"
res, status, err := pn.RemoveUUIDMetadata()
    .UUID(id)
    .Execute()
fmt.Println(res, status, err)

Response

The RemoveUUIDMetadata() operation returns a PNRemoveUUIDMetadataResponse which contains the following parameters:

Property Name	Type	Description
`Data`	interface	Returns an empty interface.

Channel

Get Metadata for All Channels

Returns a paginated list of Channel Metadata objects, optionally including the custom data object for each.

Method(s)

To Get All Channel Metadata you can use the following method(s) in the Go SDK:

pn.GetAllChannelMetadata().
    Include([]pubnub.PNChannelMetadataInclude).
    Sort(sort).
    Limit(int).
    Count(bool).
    Start(string).
    End(string).
    Filter(string).
    Execute()

* required

Parameter	Description
`Include` Type: []pubnub.PNChannelMetadataInclude	List of additional/complex space attributes to include in response. Omit this parameter if you don't want to retrieve additional attributes. Available values `pubnub.PNChannelMetadataIncludeCustom`
`Sort` Type: Array	List of criteria (name of field) which should be used for sorting. Available options are `id`, `name`, and `updated`. Use `asc` or `desc` to specify sort direction. For example: `{name: 'asc'}`
`Limit` Type: int	Number of objects to return in response. Default is `100`, which is also the maximum value.
`Count` Type: bool	Request `Count` to be included in paginated response. By default, `Count` is omitted.
`Start` Type: string	Random string returned from the server, indicating a specific position in a data set. Used for forward pagination, it fetches the next page, allowing you to continue from where you left off.
`End` Type: string	Random string returned from the server, indicating a specific position in a data set. Used for backward pagination, it fetches the previous page, enabling access to earlier data. Ignored if the `Start` parameter is supplied.
`Filter` Type: string	Expression used to filter the results. Only objects whose properties satisfy the given expression are returned. The filter language is defined here. In addition to custom attributes, the expressions can refer to attributes on associated entities one level deep (that is, the association and its target entities).

Basic Usage

incl := []pubnub.PNChannelMetadataInclude{
        pubnub.PNChannelMetadataIncludeCustom,
    }
res, status, err := pn.GetAllChannelMetadata()
    .Include(incl)
    .Sort(sort)
    .Limit(100)
    .Count(true)
    .Execute()
fmt.Println(res, status, err)

Response

The GetAllChannelMetadata() operation returns a PNGetAllChannelMetadataResponse which contains the following parameters:

Property Name	Type	Description
`Data`	[]PNChannel	Details of type `PNChannel` are here
`TotalCount`	int	Total count of objects without pagination.
`Next`	string	Random string returned from the server, indicating a specific position in a data set. Used for forward pagination, it fetches the next page, allowing you to continue from where you left off.
`Prev`	string	Random string returned from the server, indicating a specific position in a data set. Used for backward pagination, it fetches the previous page, enabling access to earlier data. Ignored if the `Next` parameter is supplied.

Get Channel Metadata

Returns metadata for the specified Channel, optionally including the custom data object for each.

Method(s)

To Get Channel Metadata you can use the following method(s) in the Go SDK:

pn.GetChannelMetadata().
    Include([]pubnub.PNChannelMetadataInclude).
     Sort(sort).
     ID(string).
     Execute()

* required

Parameter	Description
`Include` Type: []pubnub.PNChannelMetadataInclude	List of additional/complex space attributes to include in response. Omit this parameter if you don't want to retrieve additional attributes. Available values `pubnub.PNChannelMetadataIncludeCustom`
`Sort` Type: Array	List of criteria (name of field) which should be used for sorting. Available options are `id`, `name`, and `updated`. Use `asc` or `desc` to specify sort direction. For example: `{name: 'asc'}`
`ID` * Type: string	Unique user identifier. If not supplied then current user's `uuid` is used.

Basic Usage

id := "testchannel"
incl := []pubnub.PNChannelMetadataInclude{
        pubnub.PNChannelMetadataIncludeCustom,
    }
res, status, err := pn.GetChannelMetadata()
    .Include(incl)
    .Channel(id)
    .Execute()
fmt.Println(res, status, err)

Response

The GetChannelMetadata() operation returns a PNGetChannelMetadataResponse which contains the following parameters:

Property Name	Type	Description
`Data`	PNChannel	Details of type `PNChannel` are here

Set Channel Metadata

Unsupported partial updates of custom metadata

The value of the custom metadata parameter sent in this method always overwrites the value stored on PubNub servers. If you want to add new custom data to an existing one, you must:

Get the existing metadata and store it locally.
Append the new custom metadata to the existing one.
Set the entire updated custom object.

Set metadata for a Channel in the database, optionally including the custom data object for each.

Method(s)

To Set Channel Metadata you can use the following method(s) in the Go SDK:

pn.SetChannelMetadata().
    Include([]pubnub.PNChannelMetadataInclude).
    Sort(sort).
    ID(string).
    Name(string).
    Description(string).
    Custom(map[string]interface{}).
    Execute()

* required

Parameter	Description
`Include` Type: []pubnub.PNChannelMetadataInclude	List of additional/complex space attributes to include in response. Omit this parameter if you don't want to retrieve additional attributes. Available values `pubnub.PNChannelMetadataIncludeCustom`
`Sort` Type: Array	List of criteria (name of field) which should be used for sorting. Available options are `id`, `name`, and `updated`. Use `asc` or `desc` to specify sort direction. For example: `{name: 'asc'}`
`ID` * Type: string	Unique user identifier. If not supplied then current user's `uuid` is used.
`Name` * Type: string	Name of a channel.
`Description` Type: string	Description of a channel.
`Custom` Type: map[string]interface	Map of string and interface with supported data types. Values must be scalar only; arrays or objects are not supported. App Context filtering language doesn’t support filtering by custom properties.

API limits

To learn about the maximum length of parameters used to set channel metadata, refer to REST API docs.

Basic Usage

id := "testchannel"
name := "name"
desc := "desc"
custom := make(map[string]interface{}) custom["a"] = "b" custom["c"] = "d"
incl := []pubnub.PNChannelMetadataInclude{
        pubnub.PNChannelMetadataIncludeCustom,
    }
res, status, err := pn.SetChannelMetadata()
    .Include(incl)
    .Channel(id)
    .Name(name)
    .Description(desc)
    .Custom(custom)
    .Execute()

Response

The SetChannelMetadata() operation returns a PNSetChannelMetadataResponse which contains the following parameters:

Property Name	Type	Description
`Data`	PNChannel	Details of type `PNChannel` are here

PNChannel

Property Name	Type	Description
`ID`	string	Unique user identifier. If not supplied then current user's `uuid` is used.
`Name`	string	Display name for the user.
`Description`	string	Description of a channel.
`Custom`	map[string]interface	Map of string and interface with supported data types. Values must be scalar only; arrays or objects are not supported.
`Updated`	string	Last updated date.
`ETag`	string	The ETag.

Other Examples

Iteratively update existing metadata

package main

import (
	"bufio"
	"fmt"
	"os"
	"strings"

	"github.com/pubnub/go/v7"
)

func main() {
	config := pubnub.NewConfig()
	config.SubscribeKey = "demo"
	config.PublishKey = "demo"
show all 119 lines

Remove Channel Metadata

Removes the metadata from a specified channel.

Method(s)

To Remove Channel Metadata you can use the following method(s) in the Go SDK:

pn.RemoveChannelMetadata().
    ID(string).
    Execute()

* required

Parameter	Description
`ID` * Type: string	Unique user identifier. If not supplied then current user's `uuid` is used.

Basic Usage

id := "testchannel"
res, status, err := pn.RemoveChannelMetadata().Channel(id).Execute()

Response

The RemoveChannelMetadata() operation returns a PNRemoveChannelMetadataResponse which contains the following parameters:

Property Name	Type	Description
`Data`	interface	Returns an empty interface.

Channel Memberships

Get Channel Memberships

The method returns a list of channel memberships for a user. This method doesn't return a user's subscriptions.

Method(s)

To Get Memberships you can use the following method(s) in the Go SDK:

pn.GetMemberships().
    UUID(string).
    Include([]pubnub.PNMembershipsInclude).
    Sort(sort).
    Limit(int).
    Count(bool).
    Start(string).
    End(string).
    Filter(string).
    Execute()

* required

Parameter	Description
`UUID` * Type: string	Unique user identifier. If not supplied then current user's `uuid` is used.
`Include` Type: []pubnub.PNMembershipsInclude	List of additional/complex attributes to include in response. Omit this parameter if you don't want to retrieve additional attributes. Available values `pubnub.PNMembershipsIncludeCustom`, `pubnub.PNMembershipsIncludeChannel`, `pubnub.PNMembershipsIncludeChannelCustom`
`Sort` Type: Array	List of criteria (name of field) which should be used for sorting. Available options are `id`, `name`, and `updated`. Use `asc` or `desc` to specify sort direction. For example: `{name: 'asc'}`
`Limit` Type: int	Number of objects to return in response. Default is `100`, which is also the maximum value.
`Count` Type: bool	Request `Count` to be included in paginated response. By default, `Count` is omitted.
`Start` Type: string	Random string returned from the server, indicating a specific position in a data set. Used for forward pagination, it fetches the next page, allowing you to continue from where you left off.
`End` Type: string	Random string returned from the server, indicating a specific position in a data set. Used for backward pagination, it fetches the previous page, enabling access to earlier data. Ignored if the `Start` parameter is supplied.
`Filter` Type: string	Expression used to filter the results. Only objects whose properties satisfy the given expression are returned. The filter language is defined here. In addition to custom attributes, the expressions can refer to attributes on associated entities one level deep (that is, the association and its target entities).

Basic Usage

inclMemberships := []pubnub.PNMembershipsInclude{
        pubnub.PNMembershipsIncludeCustom,
        pubnub.PNMembershipsIncludeChannel,
        pubnub.PNMembershipsIncludeChannelCustom,
    }

res, status, err := pn.GetMemberships()
    .UUID("testuuid")
    .Include(inclMemberships)
    .Limit(100)
    .Count(true)
    .Execute()

Response

The GetMemberships() operation returns a PNGetMembershipsResponse which contains the following parameters:

Property Name	Type	Description
`Data`	[]PNMemberships	Details of type `PNMemberships` are here
`TotalCount`	int	Total count of objects without pagination.
`Next`	string	Random string returned from the server, indicating a specific position in a data set. Used for forward pagination, it fetches the next page, allowing you to continue from where you left off.
`Prev`	string	Random string returned from the server, indicating a specific position in a data set. Used for backward pagination, it fetches the previous page, enabling access to earlier data. Ignored if the `Next` parameter is supplied.

PNMemberships

Property Name	Type	Description
`ID`	string	Unique user identifier. If not supplied then current user's `uuid` is used.
`Channel`	PNChannel	Details of type PNChannel are here
`Custom`	map[string]interface	Map of string and interface with supported data types.
`Updated`	string	Last updated date.
`ETag`	string	The ETag.

Set Channel Memberships

Set channel memberships for a UUID.

Method(s)

To Set Memberships you can use the following method(s) in the Go SDK:

pn.SetMemberships().
    UUID(string).
    Set([]pubnub.PNMembershipsSet).
    Include([]pubnub.PNMembershipsInclude).
    Sort(sort).
    Limit(int).
    Count(bool).
    Start(string).
    End(string).
    Execute()

* required

Parameter	Description
`UUID` * Type: string	Unique user identifier. If not supplied then current user's `uuid` is used.
`Set` Type: pubnub.PNMembershipsSet	Struct of type `pubnub.PNMembershipsSet` to be added for the specified `UUID`. In `PNMembershipsSet` you can set the Channel (of type `PNMembershipsChannel` - consisting of an `ID` of `string` type ) and a `Custom` map.
`Include` Type: []pubnub.PNMembershipsInclude	List of additional/complex attributes to include in response. Omit this parameter if you don't want to retrieve additional attributes. Available values `pubnub.PNMembershipsIncludeCustom`, `pubnub.PNMembershipsIncludeChannel`, `pubnub.PNMembershipsIncludeChannelCustom`
`Sort` Type: Array	List of criteria (name of field) which should be used for sorting. Available options are `id`, `name`, and `updated`. Use `asc` or `desc` to specify sort direction. For example: `{name: 'asc'}`
`Limit` Type: int	Maximum number of results to return per page. Default 100.
`Count` Type: bool	Request TotalCount to be included in paginated response. Default `false`
`Start` Type: string	Random string returned from the server, indicating a specific position in a data set. Used for forward pagination, it fetches the next page, allowing you to continue from where you left off.
`End` Type: string	Random string returned from the server, indicating a specific position in a data set. Used for backward pagination, it fetches the previous page, enabling access to earlier data. Ignored if the `Start` parameter is supplied.

API limits

To learn about the maximum length of parameters used to set channel membership metadata, refer to REST API docs.

Basic Usage

inclMemberships := []pubnub.PNMembershipsInclude{
        pubnub.PNMembershipsIncludeCustom,
        pubnub.PNMembershipsIncludeChannel,
        pubnub.PNMembershipsIncludeChannelCustom,
    }

custom := make(map[string]interface{})
custom["a"] = "b"
custom["c"] = "d"
channel := pubnub.PNMembershipsChannel{
        ID: "testchannel",
    }

inMem := pubnub.PNMembershipsSet{
        ID: channel,
show all 29 lines

Response

The SetMemberships() operation returns a PNSetMembershipsResponse which contains the following parameters:

Property Name	Type	Description
`Data`	[]PNMemberships	Details of type `PNMemberships` are here
`TotalCount`	int	Total count of objects without pagination.
`Next`	string	Random string returned from the server, indicating a specific position in a data set. Used for forward pagination, it fetches the next page, allowing you to continue from where you left off.
`Prev`	string	Random string returned from the server, indicating a specific position in a data set. Used for backward pagination, it fetches the previous page, enabling access to earlier data. Ignored if the `Next` parameter is supplied.

Remove Channel Memberships

Remove channel memberships for a UUID.

Method(s)

To Remove Memberships you can use the following method(s) in the Go SDK:

pn.RemoveMemberships().
    UUID(string).
    Remove([]pubnub.PNMembershipsRemove).
    Include([]pubnub.PNMembershipsInclude).
    Limit(int).
    Count(bool).
    Start(string).
    End(string).
    Execute()

* required

Parameter	Description
`UUID` * Type: string	Unique user identifier. If not supplied then current user's `uuid` is used.
`Remove` Type: pubnub.PNMembershipsRemove	Struct of type `pubnub.PNMembershipsRemove` to be added for the specified `UUID`. In `PNMembershipsRemove` you can set the Channel (of type `PNMembershipsChannel` - consisting of an `ID` of `string` type ) and a `Custom` map.
`Include` Type: []pubnub.PNMembershipsInclude	List of additional/complex attributes to include in response. Omit this parameter if you don't want to retrieve additional attributes. Available values `pubnub.PNMembershipsIncludeCustom`, `pubnub.PNMembershipsIncludeChannel`, `pubnub.PNMembershipsIncludeChannelCustom`
`Limit` Type: int	Maximum number of results to return per page. Default 100.
`Count` Type: bool	Request TotalCount to be included in paginated response. Default `false`
`Start` Type: string	Random string returned from the server, indicating a specific position in a data set. Used for forward pagination, it fetches the next page, allowing you to continue from where you left off.
`End` Type: string	Random string returned from the server, indicating a specific position in a data set. Used for backward pagination, it fetches the previous page, enabling access to earlier data. Ignored if the `Start` parameter is supplied.

Basic Usage

inclMemberships := []pubnub.PNMembershipsInclude{
        pubnub.PNMembershipsIncludeCustom,
        pubnub.PNMembershipsIncludeChannel,
        pubnub.PNMembershipsIncludeChannelCustom,
    }
channel := pubnub.PNMembershipsChannel{
        ID: "testchannel",
    }
    reMem := pubnub.PNMembershipsRemove{
        ID: channel,
    }
    reArrMem := []pubnub.PNMembershipsRemove{
        reMem,
    }
res, status, err := pn.RemoveMemberships()
show all 22 lines

Response

The RemoveMemberships() operation returns a PNRemoveMembershipsResponse which contains the following parameters:

Property Name	Type	Description
`Data`	[]PNMemberships	Details of type `PNMemberships` are here
`TotalCount`	int	Total count of objects without pagination.
`Next`	string	Random string returned from the server, indicating a specific position in a data set. Used for forward pagination, it fetches the next page, allowing you to continue from where you left off.
`Prev`	string	Random string returned from the server, indicating a specific position in a data set. Used for backward pagination, it fetches the previous page, enabling access to earlier data. Ignored if the `Next` parameter is supplied.

Manage Channel Memberships

Manage the specified UUID's memberships. You can Add, Remove, and Update a UUID's memberships.

Method(s)

To Manage Memberships you can use the following method(s) in the Go SDK:

pn.ManageMemberships().
    UUID(string).
    Set([]pubnub.PNMembershipsSet).
    Remove([]pubnub.PNMembershipsRemove).
    Include([]pubnub.PNMembershipsInclude).
    Sort(sort).
    Limit(int).
    Count(bool).
    Start(string).
    End(string).
    Execute()

* required

Parameter	Description
`UUID` Type: string	Unique user identifier. If not supplied then current user's `Uuid` is used.
`Set` Type: pubnub.PNMembershipsSet	Struct of type `pubnub.PNMembershipsSet` to be added for the specified `UUID`. In `PNMembershipsSet` you can set the `Channel` (of type `PNMembershipsChannel` - consisting of an `ID` of `string` type ) and a `Custom` map.
`Remove` Type: pubnub.PNMembershipsRemove	Struct of type `pubnub.PNMembershipsRemove` to be added for the specified UUID. In `PNMembershipsRemove` you can set the `Channel` (of type `PNMembershipsChannel` - consisting of an `ID` of `string` type )
`Include` Type: []pubnub.PNMembershipsInclude	List of additional/complex attributes to include in response. Omit this parameter if you don't want to retrieve additional attributes. Available values `pubnub.PNMembershipsIncludeCustom`, `pubnub.PNMembershipsIncludeChannel`, `pubnub.PNMembershipsIncludeChannelCustom`
`Sort` Type: Array	List of criteria (name of field) which should be used for sorting. Available options are `id`, `name`, and `updated`. Use `asc` or `desc` to specify sort direction. For example: `{name: 'asc'}`
`Limit` Type: int	Maximum number of results to return per page. Default 100.
`Count` Type: bool	Request TotalCount to be included in paginated response. Default `false`
`Start` Type: string	Random string returned from the server, indicating a specific position in a data set. Used for forward pagination, it fetches the next page, allowing you to continue from where you left off.
`End` Type: string	Random string returned from the server, indicating a specific position in a data set. Used for backward pagination, it fetches the previous page, enabling access to earlier data. Ignored if the `Start` parameter is supplied.

Basic Usage

inclMemberships := []pubnub.PNMembershipsInclude{
        pubnub.PNMembershipsIncludeCustom,
        pubnub.PNMembershipsIncludeChannel,
        pubnub.PNMembershipsIncludeChannelCustom,
    }

custom := make(map[string]interface{})
custom["a"] = "b"
custom["c"] = "d"
    channel := pubnub.PNMembershipsChannel{
        ID: "testchannel",
    }

inMem := pubnub.PNMembershipsSet{
        ID: channel,
show all 30 lines

Response

The ManageMemberships() operation returns a PNManageMembershipsResponse which contains the following parameters:

Property Name	Type	Description
`Data`	[]PNMemberships	Details of type `PNMemberships` are here
`TotalCount`	int	Total count of objects without pagination.
`Next`	string	Random string returned from the server, indicating a specific position in a data set. Used for forward pagination, it fetches the next page, allowing you to continue from where you left off.
`Prev`	string	Random string returned from the server, indicating a specific position in a data set. Used for backward pagination, it fetches the previous page, enabling access to earlier data. Ignored if the `Next` parameter is supplied.

Channel Members

Get Channel Members

The method returns a list of members in a channel. The list will include user metadata for members that have additional metadata stored in the database.

Method(s)

To Get Channel Members you can use the following method(s) in the Go SDK:

pn.GetChannelMembers().
    Channel(string).
    Include(PNChannelMembersInclude).
    Sort(sort).
    Limit(int).
    Count(bool).
    Start(string).
    End(string).
    Filter(string).
    Execute()

* required

Parameter	Description
`Channel` * Type: string	Channel name.
`Include` Type: []pubnub.PNChannelMembersInclude	List of additional/complex attributes to include in response. Omit this parameter if you don't want to retrieve additional attributes. Available values `pubnub.PNChannelMembersIncludeCustom`, `pubnub.PNChannelMembersIncludeUUID`, `pubnub.PNChannelMembersIncludeUUIDCustom`
`Sort` Type: Array	List of criteria (name of field) which should be used for sorting. Available options are `id`, `name`, and `updated`. Use `asc` or `desc` to specify sort direction. For example: `{name: 'asc'}`
`Limit` Type: int	Maximum number of results to return per page. Default 100.
`Count` Type: bool	Request TotalCount to be included in paginated response. Default `false`
`Start` Type: string	Random string returned from the server, indicating a specific position in a data set. Used for forward pagination, it fetches the next page, allowing you to continue from where you left off.
`End` Type: string	Random string returned from the server, indicating a specific position in a data set. Used for backward pagination, it fetches the previous page, enabling access to earlier data. Ignored if the `Start` parameter is supplied.
`Filter` Type: string	Expression used to filter the results. Only objects whose properties satisfy the given expression are returned. The filter language is defined here. In addition to custom attributes, the expressions can refer to attributes on associated entities one level deep (that is, the association and its target entities).

Basic Usage

inclSm := []pubnub.PNChannelMembersInclude{
        pubnub.PNChannelMembersIncludeCustom,
        pubnub.PNChannelMembersIncludeUUID,
        pubnub.PNChannelMembersIncludeUUIDCustom,
    }

res, status, err := pn.GetChannelMembers()
    .Channel("testchannel")
    .Include(inclSm)
    .Limit(100)
    .Count(true)
    .Execute()
fmt.Println(res, status, err)

Response

The GetChannelMembers() operation returns a PNGetChannelMembersResponse which contains the following parameters:

Property Name	Type	Description
`Data`	[]PNChannelMembers	Details of type `PNChannelMembers` are here
`TotalCount`	int	Total count of objects without pagination.
`Next`	string	Random string returned from the server, indicating a specific position in a data set. Used for forward pagination, it fetches the next page, allowing you to continue from where you left off.
`Prev`	string	Random string returned from the server, indicating a specific position in a data set. Used for backward pagination, it fetches the previous page, enabling access to earlier data. Ignored if the `Next` parameter is supplied.

PNChannelMembers

Property Name	Type	Description
`ID`	string	Unique user identifier. If not supplied then current user's `uuid` is used.
`UUID`	PNUUID	Details of type `PNUUID` are here
`Custom`	map[string]interface	Map of string and interface with supported data types.
`Updated`	string	Last updated date.
`ETag`	string	The ETag.

Set Channel Members

This method sets members in a channel.

Method(s)

To Set Channel Members you can use the following method(s) in the Go SDK:

pn.SetChannelMembers().
    Channel(string).
    Set([]pubnub.PNChannelMembersSet).
    Include([]pubnub.PNChannelMembersInclude).
    Sort(sort).
    Limit(int).
    Count(bool).
    Start(string).
    End(string).
    Execute()

* required

Parameter	Description
`Channel` * Type: string	Channel name.
`Set` Type: pubnub.PNChannelMembersSet	Struct of type `pubnub.PNChannelMembersSet` to be added for the specified space. In `PNChannelMembersSet` you can set the `UUID` (of type `PNChannelMembersUUID` - consisting of an `ID` of `string` type ) and a `Custom` map.
`Include` Type: []pubnub.PNChannelMembersInclude	List of additional/complex attributes to include in response. Omit this parameter if you don't want to retrieve additional attributes. Available values `pubnub.PNChannelMembersIncludeCustom`, `pubnub.PNChannelMembersIncludeUUID`, `pubnub.PNChannelMembersIncludeUUIDCustom`
`Sort` Type: Array	List of criteria (name of field) which should be used for sorting. Available options are `id`, `name`, and `updated`. Use `asc` or `desc` to specify sort direction. For example: `{name: 'asc'}`
`Limit` Type: int	Maximum number of results to return per page. Default 100.
`Count` Type: bool	Request TotalCount to be included in paginated response. Default `false`
`Start` Type: string	Random string returned from the server, indicating a specific position in a data set. Used for forward pagination, it fetches the next page, allowing you to continue from where you left off.
`End` Type: string	Random string returned from the server, indicating a specific position in a data set. Used for backward pagination, it fetches the previous page, enabling access to earlier data. Ignored if the `Start` parameter is supplied.

API limits

To learn about the maximum length of parameters used to set channel members metadata, refer to REST API docs.

Basic Usage

inclSm := []pubnub.PNChannelMembersInclude{
        pubnub.PNChannelMembersIncludeCustom,
        pubnub.PNChannelMembersIncludeUUID,
        pubnub.PNChannelMembersIncludeUUIDCustom,
    }
    custom := make(map[string]interface{})
    custom["a"] = "b"
    custom["c"] = "d"
    uuid := pubnub.PNChannelMembersUUID{
        ID: "testuuid",
    }
inputUUID := pubnub.PNChannelMembersSet{
        UUID:   uuid,
        Custom: custom,
    }
show all 28 lines

Response

The SetChannelMembers() operation returns a PNSetChannelMembersResponse which contains the following parameters:

Property Name	Type	Description
`Data`	[]PNChannelMembers	Details of type `PNChannelMembers` are here
`TotalCount`	int	Total count of objects without pagination.
`Next`	string	Random string returned from the server, indicating a specific position in a data set. Used for forward pagination, it fetches the next page, allowing you to continue from where you left off.
`Prev`	string	Random string returned from the server, indicating a specific position in a data set. Used for backward pagination, it fetches the previous page, enabling access to earlier data. Ignored if the `Next` parameter is supplied.

Remove Channel Members

Remove members from a Channel.

Method(s)

To Remove Channel Members you can use the following method(s) in the Go SDK:

pn.RemoveChannelMembers().
    Channel(string).
    Remove([]pubnub.PNChannelMembersRemove{}).
    Include([]pubnub.PNChannelMembersInclude).
    Limit(int).
    Count(bool).
    Start(string).
    End(string).
    Execute()

* required

Parameter	Description
`channel` * Type: String Default: n/a	Name of channel from which members should be fetched.
`uuids` * Type: Array Default: n/a	List of `UUIDs` for which `metadata` associated with each of them in context of `channel` should be set. Each entry is dictionary with `UUID` and optional `custom` fields. `custom` should be dictionary with simple objects: `String` and `Integer`.
`sort` Type: Array Default: n/a	List of criteria (name of field) which should be used for sorting. Available options are `id`, `name`, and `updated`. Use `asc` or `desc` to specify sort direction. For example: `{name: 'asc'}`
`include` Type: Object Default: `{ count: true }`	Additional information which should be included in response. Available options: `count`- include how many UUID has been associated with metadata. `custom` - include field with additional information from metadata which has been used during `UUID` metadata set requests.
`filter` Type: String Default: n/a	Expression to filter out results basing on specified criteria. For more details on the supported grammar, check here
`start` Type: String Default: n/a	Random string returned from the server, indicating a specific position in a data set. Used for forward pagination, it fetches the next page, allowing you to continue from where you left off.
`end` Type: String Default: n/a	Random string returned from the server, indicating a specific position in a data set. Used for backward pagination, it fetches the previous page, enabling access to earlier data. Ignored if the `start` parameter is supplied.
`limit` Type: Integer Default: 100	Number of objects to return in response. Default is `100`, which is also the maximum value.
`http_sync` Type: Boolean Default: false	Method will be executed `asynchronously` and will return future, to get its `value` you can use `value` method. If set to `true`, method will return array of envelopes (even if there's only one `envelope`). For `sync` methods `Envelope` object will be returned.
`callback` Type: Lambda accepting one parameter Default: n/a	`Callback` that will be called for each envelope. For `async` methods future will be returned, to retrieve `value` `Envelope` object you have to call `value` method (thread will be locked until the `value` is returned).

Basic Usage

inclSm := []pubnub.PNChannelMembersInclude{
        pubnub.PNChannelMembersIncludeCustom,
        pubnub.PNChannelMembersIncludeUUID,
        pubnub.PNChannelMembersIncludeUUIDCustom,
    }
    uuid := pubnub.PNChannelMembersUUID{
        ID: "testuuid",
    }
    re := pubnub.PNChannelMembersRemove{
        UUID: uuid,
    }

    reArr := []pubnub.PNChannelMembersRemove{
        re,
    }
show all 24 lines

Response

The RemoveChannelMembers() operation returns a PNRemoveChannelMembersResponse which contains the following parameters:

Property Name	Type	Description
`Data`	[]PNChannelMembers	Details of type `PNChannelMembers` are here
`TotalCount`	int	Total count of objects without pagination.
`Next`	string	Random string returned from the server, indicating a specific position in a data set. Used for forward pagination, it fetches the next page, allowing you to continue from where you left off.
`Prev`	string	Random string returned from the server, indicating a specific position in a data set. Used for backward pagination, it fetches the previous page, enabling access to earlier data. Ignored if the `Next` parameter is supplied.

Manage Channel Members

The method Set and Remove channel memberships for a user.

Method(s)

To Manage Channel Members you can use the following method(s) in the Go SDK:

pn.ManageChannelMembers().
    Channel(string).
    Set([]pubnub.PNChannelMembersSet).
    Remove([]pubnub.PNChannelMembersRemove{}).
    Include([]pubnub.PNChannelMembersInclude).
    Sort(sort).
    Limit(int).
    Count(bool).
    Start(string).
    End(string).
    Execute()

* required

Parameter	Description
`Channel` * Type: string	Channel Name.
`Set` Type: pubnub.PNChannelMembersSet	Struct of type `pubnub.PNChannelMembersSet` to be added for the specified space. In `PNChannelMembersSet` you can set the `UUID` (of type `PNChannelMembersUUID` - consisting of an `ID` of `string` type ) and a `Custom` map.
`Remove` Type: pubnub.PNChannelMembersRemove	Struct of type `pubnub.PNChannelMembersRemove` to be removed for the specified space. In `PNChannelMembersRemove` you can set the `UUID` (of type `PNChannelMembersUUID` - consisting of an `ID` of `string` type )
`Limit` Type: int	Maximum number of results to return per page. Default 100.
`Count` Type: bool	Request TotalCount to be included in paginated response. Default `false`
`Start` Type: string	Random string returned from the server, indicating a specific position in a data set. Used for forward pagination, it fetches the next page, allowing you to continue from where you left off.
`End` Type: string	Random string returned from the server, indicating a specific position in a data set. Used for backward pagination, it fetches the previous page, enabling access to earlier data. Ignored if the `Start` parameter is supplied.
`Sort` Type: Array	List of criteria (name of field) which should be used for sorting. Available options are `id`, `name`, and `updated`. Use `asc` or `desc` to specify sort direction. For example: `{name: 'asc'}`
`Include` Type: []pubnub.PNChannelMembersInclude	List of additional/complex attributes to include in response. Omit this parameter if you don't want to retrieve additional attributes. Available values `pubnub.PNChannelMembersIncludeCustom`, `pubnub.PNChannelMembersIncludeUUID`, `pubnub.PNChannelMembersIncludeUUIDCustom`

Basic Usage

inclSm := []pubnub.PNChannelMembersInclude{
        pubnub.PNChannelMembersIncludeCustom,
        pubnub.PNChannelMembersIncludeUUID,
        pubnub.PNChannelMembersIncludeUUIDCustom,
    }
    custom := make(map[string]interface{})
    custom["a"] = "b"
    custom["c"] = "d"
    uuid := pubnub.PNChannelMembersUUID{
        ID: "testuuid",
    }
inputUUID := pubnub.PNChannelMembersSet{
        UUID:   uuid,
        Custom: custom,
    }
show all 29 lines

Response

The ManageChannelMembers() operation returns a PNManageMembersResponse which contains the following parameters:

Property Name	Type	Description
`Data`	[]PNChannelMembers	Details of type `PNChannelMembers` are here
`TotalCount`	int	Total count of objects without pagination.
`Next`	string	Random string returned from the server, indicating a specific position in a data set. Used for forward pagination, it fetches the next page, allowing you to continue from where you left off.
`Prev`	string	Random string returned from the server, indicating a specific position in a data set. Used for backward pagination, it fetches the previous page, enabling access to earlier data. Ignored if the `Next` parameter is supplied.

User​

Get Metadata for All Users​

Method(s)​

Basic Usage​

Reference code

Response​

Get User Metadata​

Method(s)​

Basic Usage​

Response​

Set User Metadata​

Unsupported partial updates of custom metadata

Method(s)​

API limits

Basic Usage​

Response​

PNUUID​

Remove User Metadata​

Method(s)​

Basic Usage​

Response​

Channel​

Get Metadata for All Channels​

Method(s)​

Basic Usage​

Response​

Get Channel Metadata​

Method(s)​

Basic Usage​

Response​

Set Channel Metadata​

Unsupported partial updates of custom metadata

Method(s)​

API limits

Basic Usage​

Response​

PNChannel​

Other Examples​

Iteratively update existing metadata​

Remove Channel Metadata​

Method(s)​

Basic Usage​

Response​

Channel Memberships​

Get Channel Memberships​

Method(s)​

Basic Usage​

Response​

PNMemberships​

Set Channel Memberships​

Method(s)​

API limits

Basic Usage​

Response​

Remove Channel Memberships​

Method(s)​

Basic Usage​

Response​

Manage Channel Memberships​

Method(s)​

Basic Usage​

Response​

Channel Members​

Get Channel Members​

Method(s)​

Basic Usage​

Response​

PNChannelMembers​

Set Channel Members​

Method(s)​

API limits

Basic Usage​

Response​

Remove Channel Members​

Method(s)​

Basic Usage​

Response​

Manage Channel Members​

Method(s)​

Basic Usage​

User

Get Metadata for All Users

Method(s)

Basic Usage

Response

Get User Metadata

Method(s)

Basic Usage

Response

Set User Metadata

Method(s)

Basic Usage

Response

PNUUID

Remove User Metadata

Method(s)

Basic Usage

Response

Channel

Get Metadata for All Channels

Method(s)

Basic Usage

Response

Get Channel Metadata

Method(s)

Basic Usage

Response

Set Channel Metadata

Method(s)

Basic Usage

Response

PNChannel

Other Examples

Iteratively update existing metadata

Remove Channel Metadata

Method(s)

Basic Usage

Response

Channel Memberships

Get Channel Memberships

Method(s)

Basic Usage

Response

PNMemberships

Set Channel Memberships

Method(s)

Basic Usage

Response

Remove Channel Memberships

Method(s)

Basic Usage

Response

Manage Channel Memberships

Method(s)

Basic Usage

Response

Channel Members

Get Channel Members

Method(s)

Basic Usage

Response

PNChannelMembers

Set Channel Members

Method(s)

Basic Usage

Response

Remove Channel Members

Method(s)

Basic Usage

Response

Manage Channel Members

Method(s)

Basic Usage

Response