Retrieve a list of channels

You can retrieve a list of OpenChannel objects using the next() method of an OpenChannelListQuery instance and a list of GroupChannel objects using the next() method of a GroupChannelListQuery instance. The GroupChannelListQuery instance returns both public and private group channels that the current user has joined. To retrieve a list of all public group channels regardless of membership status, use the PublicGroupChannelListQuery instance as described later on this page.

Note: You can also search for specific open channels and group channels with keywords and filters.

Create an OpenChannelListQuery instance to retrieve a list of open channels matching the specifications set by OpenChannelListQueryParams. After a list of open channels is successfully retrieved, you can access the data of each open channel from the result list through the channels parameter of the callback handler.

const query: OpenChannelListQuery = sb.openChannel.createOpenChannelListQuery();

if (query.hasNext) {
    const channels: OpenChannel[] = await query.next();
}

Create a GroupChannelListQuery instance to retrieve a list of group channels matching the specifications set by GroupChannelListQueryParams.

You can set the GroupChannelListQueryParams's includeEmpty property to true to allow users to view empty channels, which include channels that are empty because the view chat history option is turned off to prevent new members from seeing previous conversations. You can determine whether to turn on the chat history option on Sendbird Dashboard under Settings > Chat > Channels > Group channels.

After a list of group channels is successfully retrieved, you can access the data of each channel from the result list through the channels parameter of the callback handler.

const params: GroupChannelListQueryParams = {
    includeEmpty: true,
    myMemberStateFilter: MyMemberStateFilter.JOINED,
    order: GroupChannelListOrder.LATEST_LAST_MESSAGE,
    limit: 15, // The value of the pagination limit could be set up to 100.
};
const query: GroupChannelListQuery = sb.groupChannel.createMyGroupChannelListQuery(params);

if (query.hasNext) {
    const channels: GroupChannel[] = await query.next();
}

If you want to retrieve a list of all public group channels regardless of the current user's membership status, use the PublicGroupChannelListQuery instance and set membershipFilter to MembershipFilter.ALL in PublicGroupChannelListQueryParams.

The hasNext() method checks if there are more public group channels to retrieve and the next() method will return them. After a list of public group channels is successfully retrieved, you can access the data of each channel from the result list through the channels parameter of the callback handler.

const params: PublicGroupChannelListQueryParams = {
    includeEmpty: true,
    membershipFilter: MembershipFilter.ALL,
    order: PublicGroupChannelListOrder.CHRONOLOGICAL,
    limit: 15, // The value of the pagination limit could be set up to 100.
};
const query: PublicGroupChannelListQuery = sb.groupChannel.createPublicGroupChannelListQuery(params);

if (query.hasNext) {
    const channels: GroupChannel[] = await query.next();
}

To retrieve a list of Supergroup channels, you can set the superChannelFilter property to SuperChannelFilter.SUPER in either the GroupChannelListQuery or PublicGroupChannelListQuery instance. The superChannelFilter property works much like other search filters. Use GroupChannelListQuery when only searching for group channels that the current user belongs to, and use PublicGroupChannelListQuery when searching for all public group channels regardless of the current user's membership status.

When queried channels are returned, you can check that the channel is a Supergroup channel by looking at whether the isSuper property has a value of true.

const params: GroupChannelListQueryParams = {
    superChannelFilter: SuperChannelFilter.SUPER,
};
const query: GroupChannelListQuery = sb.groupChannel.createMyGroupChannelListQuery(params);
const channels: GroupChannel[] = await query.next();

const params: PublicGroupChannelListQueryParams = {
    superChannelFilter: SuperChannelFilter.SUPER,
};
const query: PublicGroupChannelListQuery = sb.groupChannel.createPublicGroupChannelListQuery(params);
const channels: GroupChannel[] = await query.next();