While writing the code for the central registry in ProjectState. I came across a problem which is mentioned below. I am trying to figure out the solution for the same. I would be glad if anyone may help me out with this.
Problem
To initialize the central registry in django.db.migrations.state.ProjectState.add_model I need the following parameters
- from_app_label
- from model_name
- from field
- to model_name
- to app_label
- to_field
Out of all these required values I figured out how to get the first 5 values as follows:
- from_app_label -
model_State.app_label - from model_name -
model_state.name_lower - from field -
model_state.fields.items() - to model_name -
model_state.fields.items().field.remote_field.model - to app_label -
model_state.fields.items().field.remote_field.model.split(".")
But I am unable to figure out how can I get to_field in case the to_field is not explicitly defined by the developer.
Suggestions and feedback would be highly appreciated.
Regard,
Manav