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I am terribly sorry for the crummy title to this question. I can’t think of how to phrase it in a simple context.
I am making a simple photo gallery. The admin can create a gallery page and upload images to it. For each gallery I want there to be a single banner image from one of the photos. The Photo model has a CharField which will tell if its a banner or not. Is there a way to make the variable to allow only one ‘B’ for every photo that belongs to a Gallery?
You should define a
unique_togethervariable for your class. If names of your fields arealbumandbanner, you should add this line to Meta class of your model.Django Documents, unique-together
And i think, using charfield for a boolean value isn’t a correct choice. You should change your
bannerfield as BooleanField.