mirror of
https://github.com/pretix/pretix.git
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52 lines
2.3 KiB
Python
52 lines
2.3 KiB
Python
"""
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Django, for theoretically very valid reasons, creates migrations for *every single thing*
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we change on a model. Even the `help_text`! This makes sense, as we don't know if any
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database backend unknown to us might actually use this information for its database schema.
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However, pretix only supports PostgreSQL, MySQL, MariaDB and SQLite and we can be pretty
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certain that some changes to models will never require a change to the database. In this case,
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not creating a migration for certain changes will save us some performance while applying them
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*and* allow for a cleaner git history. Win-win!
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Only caveat is that we need to do some dirty monkeypatching to achieve it...
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"""
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from django.core.management.commands.makemigrations import Command as Parent
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from django.db import models
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from django.db.migrations.operations import models as modelops
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from django_countries.fields import CountryField
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modelops.AlterModelOptions.ALTER_OPTION_KEYS.remove("verbose_name")
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modelops.AlterModelOptions.ALTER_OPTION_KEYS.remove("verbose_name_plural")
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modelops.AlterModelOptions.ALTER_OPTION_KEYS.remove("ordering")
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modelops.AlterModelOptions.ALTER_OPTION_KEYS.remove("get_latest_by")
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modelops.AlterModelOptions.ALTER_OPTION_KEYS.remove("default_manager_name")
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modelops.AlterModelOptions.ALTER_OPTION_KEYS.remove("permissions")
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modelops.AlterModelOptions.ALTER_OPTION_KEYS.remove("default_permissions")
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IGNORED_ATTRS = [
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# (field type, attribute name, blacklist of field sub-types)
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(models.Field, 'verbose_name', []),
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(models.Field, 'help_text', []),
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(models.Field, 'validators', []),
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(models.Field, 'editable', [models.DateField, models.DateTimeField, models.DateField, models.BinaryField]),
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(models.Field, 'blank', [models.DateField, models.DateTimeField, models.AutoField, models.NullBooleanField,
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models.TimeField]),
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(models.CharField, 'choices', [CountryField])
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]
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original_deconstruct = models.Field.deconstruct
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def new_deconstruct(self):
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name, path, args, kwargs = original_deconstruct(self)
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for ftype, attr, blacklist in IGNORED_ATTRS:
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if isinstance(self, ftype) and not any(isinstance(self, ft) for ft in blacklist):
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kwargs.pop(attr, None)
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return name, path, args, kwargs
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models.Field.deconstruct = new_deconstruct
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class Command(Parent):
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pass
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