Ability to disable implicit field creation

[cancan101]

Add an option to disable implicit field creation. I have been burned on this when using ModelSchema where a field changes name such that there is now a field with the old name an an auto generated field with the new name leading two duplicate fields.

[deckar01]

Can you provide an example?

[cancan101]

I shouldn't say duplicate. I should just say a Schema which is silently using the wrong name.

Originally my model is:

class Widget(Model):
    ...
    other_id = ...

and then I have:

class WidgetSchema(ModelSchema):
   class Meta:
     model = Widget
     fields = ('other_id')

and then other_id gets renamed in the Model. The Schema code doesn't get updated. Now there is an implicit other_id which is not using the nicely autogenerated field that ModelSchema would otherwise make.

[lafrech]

IIUC, this is a marshmallow-sqlalchemy issue.

But since it could affect any other marshmallow-whatever-database lib, and since the fix could be in marshmallow anyway, it makes sense to discuss it here.

[sloria]

Let's move forward with #1356 .