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Chat SDKs Flutter v4
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Chat SDKs
Flutter
Version 4
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Filter group channels by user IDs

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To filter group channels by user IDs, use GroupChannelListQuery's userIdsExactFilter or userIdsIncludeFilter. Let's assume the ID of the current user is Harry and the user is a member of three group channels.

  • Channel A: Harry and Jay.
  • Channel B: Harry, John, and Jin.
  • Channel C: Harry, John, Jin, and Jay.

A userIdsExactFilter filter returns a list of the current user's group channels containing exactly the queried user IDs. In case you specify only one user ID in the filter, the filter returns a list of the current user's one or more distinct 1-to-1 group channels with the specified user.

try {
  final query = GroupChannelListQuery()
    ..userIdsExactFilter = ['Jay'];

  final groupChannels = await query.next();
} catch (e) {
  // Handle error.
}
// If successful, only Channel A is returned.

A userIdsIncludeFilter filter returns a list of the current user's group channels including the queried user IDs partially or exactly. Depending on the value of the GroupChannelListQueryType parameter, different results can be returned.

try {
  final query = GroupChannelListQuery()
    ..setUserIdsIncludeFilter(['John', 'Jay', 'Jin'], GroupChannelListQueryType.and);

  final groupChannels = await query.next();
  // Channels should include only ['John', 'Jay', 'Jin'] as a subset. 
  // Thus, if successful, only Channel C is returned.
} catch (e) {
  // Handle error.
}

try {
  final query = GroupChannelListQuery()
    ..setUserIdsIncludeFilter(['John', 'Jay', 'Jin'], GroupChannelListQueryType.or);
    
  final groupChannels = await query.next();
  // Channels may include any of the items in ['John', 'Jay', 'Jin'].
  // Thus, if successful, all Channel A,B, and C are returned.
} catch (e) {
  // Handle error.
}