update child view from parent does not work when state change

[saroar]

public struct ConversationsState: Equatable {
  ..........
  public var conversations: IdentifiedArrayOf<ConversationResponse.Item> = []
}

public struct TabsState: Equatable {
  ........
  public var conversations: ConversationsState
}

public let tabsReducer = Reducer<TabsState, TabsAction, TabsEnvironment> { state, action, environment in
 ..............................
  case let .receivedSocketMessage(.success(.string(str))):

      guard let data = str.data(using: .utf8) else {
        return .none
      }

      let chatOutGoingEvent = ChatOutGoingEvent.decode(data: data)

      switch chatOutGoingEvent {
      case .conversation(let message):

          // before update working update child my view
          guard let index = state.conversations.conversations
            .firstIndex(where: { $0.id == message.conversationId }) else {
          return .none
          }
          state.conversations.conversations[index].lastMessage = message
          // old code crash becz
         // "use the id-based subscript, instead, for in-place modification"

          // after which not working not update my child view
          state.conversations.conversations[id: message.conversationId]?
          .lastMessage = message
        return .none
      case .message(let message):
        state.conversations.chatState?.messages.insert(message, at: 0)
        return .none
      }
}

[mbrandonw]

I am going to convert this to a discussion as it doesn’t appear to be an issue with the library.

[stephencelis]

@saroar We'd love to help, but we really need a sample project where we can observe this behavior. Can you please attach a small project that reproduces the problem? Unfortunately I'm unable to get your AddaMe project to build in Xcode, though even if I could it's quite a big project so I'm not sure I'd know how to track down the issue 😅

[saroar]

For now, I will use the older version TCA 0.20.0
only i am having issue is when parent update child state view was not update
Thanks for try to help @stephencelis

[stephencelis]

Sounds good! If you are able to provide a repro in the future, please do share it! Or hopefully someone else will encounter the problem and can help us track down the issue, as well.

[saroar]

before i use let = array: [ConversationResponse.Item] = []
but now I am using IdentifiedArrayOf <ConversationResponse.Item> = [] may be I will debug more

[saroar]

@stephencelis this how i fixed

state.conversations.conversations[id: message.conversationId]? .lastMessage = message
state.conversations.conversations.sort() // <- this line are fixed my issue 

may be its dispatch issue