Flutter bloc - Casting issue

Question

I have an issue when trying to update a bloc's state locally. I am trying to retrieve the state to manipulate the data and then emit a new state so it reflects those changes in the UI. I am not trying to manipulate the state itself just the property. The property is of type List this class is defined like this

This entity is in the domain layer. I have another class at the data layer which is defined like this

I am trying to modify one user's email and name but when retrieving the property is being parsed to List which is not correct since my porperty is defined as a List and when trying to update the list it fails. I do not want to cast the entire list to a userDataModel since that layer(presentation) where the bloc is should not know about models just entities.

I have tried to specified the types in both classes but I still get the same error. I have tried to copyWith the class and still having the same result. I have tried casting the list from List to List but does take effect.

Here is the error I am getting in the console.

Maybe I am doing things wrong, I have never had to modified a state locally like this. Any advice with an example would be really helpful on how to handle this scenario.

[Please do not upload images of code/data/errors when asking a question.](//meta.stackoverflow.com/q/285551) — Ken White, Sep 26 '22 at 01:15
Please post the code realted to your bloc, i don't see anything wrong in above code — Sanketh B. K, Sep 26 '22 at 02:36

score 0 · Answer 1 · answered Sep 26 '22 at 15:13

Ok, after a good night sleep I found that this is the best way to update a bloc.

//!Modify user in users list
final UsersListLoaded actualState = state as UsersListLoaded;
List<UserData> modifiedList = actualState.usersList.map((userData) {
  return userData.id == event.user.id ? event.user : userData;
}).toList();

And afterwards emit the loaded state with proper data.

Flutter bloc - Casting issue

1 Answers1