How to get the existing instance in case object is registered as Factory?

[trietbui85]

First of all, thank you for this great service locator library. I'm using it in my all 3 projects.

Assuming I have 2 screen A and B. I register a BaseBloc as Factory, thus each time enter these screens, I will get a new instance of BaseBloc.

Screen A has 2 child screens A1 and A2. Instead of passing BaseBloc to A1 and A2, I would like to get use GetIt to get it in A1 and A2 instead. However, since BaseBloc was registered as Factory, in A1 when I have BaseBloc, its data was reset to new instance (not have any data which from A screen).

I wonder if we have any existing solutions for this case? If not, I'm thinking about a new param for GetIt.I<BaseBloc>(returnInstanceIfExisting: true) - which will return existing instance of BaseBloc instead of creating the new one.

How do you think about my idea?

More info:

get_it: ^4.0.0

Flutter version 1.12.13+hotfix.5 at C:\DevTools\flutter
Framework revision 27321ebbad (4 months ago), 2019-12-10 18:15:01 -0800
Engine revision 2994f7e1e6
Dart version 2.7.0

[escamoteur]

I wonder if we have any existing solutions for this case? If not, I'm thinking about a new param for GetIt.I(returnInstanceIfExisting: true) - which will return existing instance of BaseBloc instead of creating the new one.

is not possible because I don't keep track of factory created objects. How would I know when it is no longer needed?

I think what you would need were scoped singletons but that's something that's not supported yet.