Migrations always include Alter field format_type on film

[p-j-smith]

Definition of Done / Acceptance Criteria

Running python manage.py makemigrations doesn't (unnecessarily) include alterations to the format type of the Film model

Testing

Without making any changes to the code, run python manage.py makemigrations and check the Film model is not altered

Documentation

No response

Dependencies

No response

Comments

I think the format type always changes because FORMAT_CHOICES is a set:

museum_of_dreams/mod_app/models/film_model.py

Lines 72 to 84 in 90db50e

	FORMAT_CHOICES = {
	("9.5", "9.5 mm"),
	("16", "16 mm"),
	("35", "35 mm"),
	("70", "70 mm"),
	("other", "Other"),
	}
	format_type = models.CharField(
	max_length=5,
	default="35",
	verbose_name="format",
	choices=FORMAT_CHOICES,

This means the order of the tuples is not guaranteed. Changing FORMAT_CHOICES to a list should resolve the issue