App Context API for PubNub 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 set or removed from the database. 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()

Parameter	Type	Required	Description
Include	[]pubnub.PNUUIDMetadataInclude	Optional	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	Array	Optional	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	int	Optional	Number of objects to return in response. Default is 100, which is also the maximum value.
Count	bool	Optional	Request Count to be included in paginated response. By default, Count is omitted.
Start	string	Optional	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	string	Optional	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	string	Optional	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.PNUUIDMetadataInclude{
        pubnub.PNUUIDMetadataIncludeCustom,
    }

res, status, err := pn.GetAllUUIDMetadata()
    .Include(incl)
    .Sort(sort)
    .Limit(100)
    .Count(true)
    .Execute()

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()

Parameter	Type	Required	Description
Include	[]pubnub.PNUUIDMetadataIncludeCustom	Optional	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	Array	Optional	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	string	Yes	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

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()

Parameter	Type	Required	Description
Include	[]pubnub.PNUUIDMetadataInclude	Optional	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	string	Yes	Unique user identifier. If not supplied then current user's uuid is used.
Sort	Array	Optional	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	string	Yes	Display name for the user.
ExternalID	string	Optional	User's identifier in an external system
ProfileURL	string	Optional	The URL of the user's profile picture
Email	string	Optional	The user's email address.
Custom	map[string]interface	Optional	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()

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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()

Parameter	Type	Required	Description
ID	string	Yes	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()

Parameter	Type	Required	Description
Include	[]pubnub.PNChannelMetadataInclude	Optional	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	Array	Optional	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	int	Optional	Number of objects to return in response. Default is 100, which is also the maximum value.
Count	bool	Optional	Request Count to be included in paginated response. By default, Count is omitted.
Start	string	Optional	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	string	Optional	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	string	Optional	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()

Parameter	Type	Required	Description
Include	[]pubnub.PNChannelMetadataInclude	Optional	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	Array	Optional	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	string	Yes	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

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()

Parameter	Type	Required	Description
Include	[]pubnub.PNChannelMetadataInclude	Optional	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	Array	Optional	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	string	Yes	Unique user identifier. If not supplied then current user's uuid is used.
Name	string	Yes	Name of a channel.
Description	string	Optional	Description of a channel.
Custom	map[string]interface	Optional	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.

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()

Parameter	Type	Required	Description
ID	string	Yes	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()

Parameter	Type	Required	Description
UUID	string	Yes	Unique user identifier. If not supplied then current user's uuid is used.
Include	[]pubnub.PNMembershipsInclude	Optional	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	Array	Optional	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	int	Optional	Number of objects to return in response. Default is 100, which is also the maximum value.
Count	bool	Optional	Request Count to be included in paginated response. By default, Count is omitted.
Start	string	Optional	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	string	Optional	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	string	Optional	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()

Parameter	Type	Required	Description
UUID	string	Yes	Unique user identifier. If not supplied then current user's uuid is used.
Set	pubnub.PNMembershipsSet	Optional	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	[]pubnub.PNMembershipsInclude	Optional	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	Array	Optional	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	int	Optional	Maximum number of results to return per page. Default 100.
Count	bool	Optional	Request TotalCount to be included in paginated response. Default false
Start	string	Optional	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	string	Optional	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,

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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()

Parameter	Type	Required	Description
UUID	string	Yes	Unique user identifier. If not supplied then current user's uuid is used.
Remove	pubnub.PNMembershipsRemove	Optional	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	[]pubnub.PNMembershipsInclude	Optional	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	int	Optional	Maximum number of results to return per page. Default 100.
Count	bool	Optional	Request TotalCount to be included in paginated response. Default false
Start	string	Optional	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	string	Optional	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()

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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()

Parameter	Type	Required	Description
UUID	string	string	Unique user identifier. If not supplied then current user's Uuid is used.
Set	pubnub.PNMembershipsSet	Optional	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	pubnub.PNMembershipsRemove	Optional	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	[]pubnub.PNMembershipsInclude	Optional	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	Array	Optional	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	int	Optional	Maximum number of results to return per page. Default 100.
Count	bool	Optional	Request TotalCount to be included in paginated response. Default false
Start	string	Optional	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	string	Optional	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,

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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()

Parameter	Type	Required	Description
Channel	string	Yes	Channel name.
Include	[]pubnub.PNChannelMembersInclude	Optional	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	Array	Optional	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	int	Optional	Maximum number of results to return per page. Default 100.
Count	bool	Optional	Request TotalCount to be included in paginated response. Default false
Start	string	Optional	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	string	Optional	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	string	Optional	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()

Parameter	Type	Required	Description
Channel	string	Yes	Channel name.
Set	pubnub.PNChannelMembersSet	Optional	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	[]pubnub.PNChannelMembersInclude	Optional	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	Array	Optional	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	int	Optional	Maximum number of results to return per page. Default 100.
Count	bool	Optional	Request TotalCount to be included in paginated response. Default false
Start	string	Optional	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	string	Optional	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,
    }

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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()

Parameter	Type	Required	Default	Description
channel	String	Yes		Name of channel from which members should be fetched.
uuids	Array	Yes		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	Array	Optional		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	Object	Optional	{ 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	String	Optional		Expression to filter out results basing on specified criteria. For more details on the supported grammar, check here
start	String	Optional		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	String	Optional		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	Integer	Optional	100	Number of objects to return in response. Default is 100, which is also the maximum value.
http_sync	Boolean	Optional	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	Lambda accepting one parameter	Optional		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,
    }

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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()

Parameter	Type	Required	Description
Channel	string	Yes	Channel Name.
Set	pubnub.PNChannelMembersSet	Optional	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	pubnub.PNChannelMembersRemove	Optional	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	int	Optional	Maximum number of results to return per page. Default 100.
Count	bool	Optional	Request TotalCount to be included in paginated response. Default false
Start	string	Optional	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	string	Optional	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	Array	Optional	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	[]pubnub.PNChannelMembersInclude	Optional	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,
    }

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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.