id	summary	reporter	owner	description	type	status	component	version	severity	resolution	keywords	cc	stage	has_patch	needs_docs	needs_tests	needs_better_patch	easy	ui_ux
33101	Improve output of non-interactive migration questioner	Hiroki Sawano	Hiroki Sawano	"The non-interactive questioner doesn't tell anything about a suppressed prompt, so it is difficult to see what happened when, for example, adding a non-nullable field to a model without specifying a default.
I'd like it to print messages as shown below, like the interactive questioner does.

{{{
$ python manage.py makemigrations --noinput
It is impossible to add a non-nullable field '...' to ... without specifying a default. This is because the database needs something to populate existing rows.
}}}

If that makes sense, I'll change {{{ask_not_null_addition}}}, {{{ask_not_null_alteration}}}, and {{{ask_auto_now_add_addition}}} in {{{django.db.migrations.questioner.NonInteractiveMigrationQuestioner}}} like this:

{{{
class NonInteractiveMigrationQuestioner(MigrationQuestioner):

    def ask_not_null_addition(self, field_name, model_name):
        # We can't ask the user, so act like the user aborted.
        print(
            f""It is impossible to add a non-nullable field '{field_name}' ""
            f""to {model_name} without specifying a default. This is ""
            f""because the database needs something to populate existing ""
            f""rows.""
        )
        sys.exit(3)

    def ask_not_null_alteration(self, field_name, model_name):
        # We can't ask the user, so set as not provided.
        print(
            f""It is impossible to change a nullable field '{field_name}' ""
            f""on {model_name} to non-nullable without providing a ""
            f""default. This is because the database needs something to ""
            f""populate existing rows.\n""
            f""Existing rows that contain NULL values ""
            f""will have to be handled manually, for example with a ""
            f""RunPython or RunSQL operation.""
        )
        return NOT_PROVIDED

    def ask_auto_now_add_addition(self, field_name, model_name):
        # We can't ask the user, so act like the user aborted.
        print(
            f""It is impossible to add the field '{field_name}' with ""
            f""'auto_now_add=True' to {model_name} without providing a ""
            f""default. This is because the database needs something to ""
            f""populate existing rows.""
        )
        sys.exit(3)
}}}"	Cleanup/optimization	closed	Migrations	dev	Normal	duplicate			Unreviewed	0	0	0	0	0	0