ChannelListController filtering updates

[NatashaLavrinenko]

Hey!
Currently the search in ChannelListController was implemented. Here's the filtering that's used.

let channelsController = self._getStreamHandler.client.channelListController(
                query: .init(
                    filter: .and([
                        .autocomplete(.memberName, text: userName),
                        .containMembers(userIds: [self._userId])
                    ]),
                    sort: [.init(key: .lastMessageAt)]
                )
            )

Faced with 2 issues that were found by QA, didn't find anything about it in documentation.

1. When the username of current logged user is typed, all the chats are returned, but it's expected that nothing should be returned or the list with chats that starts with the same symbols as current usernames. Is it possible to fix it?
2. When special symbols are added(e.g. .-_) and several usernames contain them, no channels are returned. What could be done for fixing it?
   Thanks in advance!

[nuno-vieira]

Hi @NatashaLavrinenko,

1. Can you explain this one a bit better? Maybe share a video example?
2. Can you try using .contains instead of .autocomplete?

Best,
Nuno

[NatashaLavrinenko]

Hey @nuno-vieira ,

Sure, I've recorded video showing both issues:

1. The username of my current logged user is Natasha and it was added as a search query
2. Channels list contains channel with "!" character, but when it's added to query, no results are returned.

Best regards,
Nataliia.

[nuno-vieira]

Hi @NatashaLavrinenko,

1. This is expected. You are searching for the members that belong to the channel. Those 3 channels are the channels you belong to. So if you search by your name, the 3 channels that you belong to will appear.
2. It seems that .contains does not work for member names at the moment. I have this error: "QueryChannels failed with error: "operator $contains is not supported for field `member.user.name`", so the only option is using .autocomplete, the problem is that autocomplete works like a prefix. So if you search by _, only the users that start with _ will work. Example, _natasha will work, but not natash_lavrinenko.

For 2., if you want to know more info about it, and when the backend will provide this, you can contact our support team and they will be able to give you an ETA on when the backend might support this. Please reach ouR support here: https://getstream.io/contact/support/

Best,
Nuno

[NatashaLavrinenko]

Hey @nuno-vieira,
Thanks for your reply!

1. Could you please recommend how to avoid this issue, as it's not expected for our app?
2. Thanks, will reach to support

Best regards,
Nataliia.

[nuno-vieira]

Hi @NatashaLavrinenko,

1. I'm not sure I'm understanding your goal on this one. Do you want to search channels that the user does not belong to?

Best,
Nuno

[NatashaLavrinenko]

Hey @nuno-vieira,
The screen with private chats for a user is shown with the following query:

 let channelsController = self._getStreamHandler.client.channelListController(
                query: .init(
                    filter: .and([
                        .autocomplete(.memberName, text: userName),
                        .equal(.type, to: .custom("type"))
                    ]),
                    sort: [.init(key: .lastMessageAt)]
                )
            )

When the username of current logged user is typed as userName, the result is the list of all the chats for a particular user, which is not correct, it should return empty list.

Best regards,
Nataliia

[nuno-vieira]

Hi @NatashaLavrinenko,

It is correct. That is the expected behaviour of that query. If this is not what your application needs, it is a different thing.

Maybe one way to do what you need, is the following query:

 let channelsController = self._getStreamHandler.client.channelListController(
                query: .init(
                    filter: .and([
                        .autocomplete(.memberName, text: userName),
                        .notEqual(.memberName, to: loggedInUser.name),
                        .equal(.type, to: .custom("type"))
                    ]),
                    sort: [.init(key: .lastMessageAt)]
                )
            )

You need to provide that you don't want channels from the current logged-in user.

Best,
Nuno

[nuno-vieira]

If this approach does not work for you, I recommend you reach out to the support team. They will be able to let you know if there is a solution for this, or if this would require a backend change.