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
23471	makemigrations fails if you take out a function used in a previous migration	Daniel Finch	nobody	In a previous migration I was using a method to determine the default value for a model field, that code was then changed and the method removed, but I am no longer able to use `makemigrations` because it tries to call that method.  The same thing happens if you were using a custom model field and then change to a different one and remove the old code. To get around this, you either have to modify the migration files manually, or keep the old code in until you have at least run a makemigrations, not sure if you have to keep it indefinitely.	Bug	closed	Migrations	1.7	Normal	invalid			Unreviewed	0	0	0	0	0	0