def do_migrations(self):
"""
Do a custom migration without leaving any migration files
around.
"""
old_desc = DynamicModel.objects.filter(name=self.name).first()
try:
OldModel = apps.get_model("django_models_from_csv", self.name)
except LookupError:
OldModel = None
# TODO: for some reason force_new=True (removed now, but forces re-
# creation of the model class) makes the model show up multiple
# times in the admin. but setting this to False makes the meta
# schema migrations not work properly w/o restarting the system.
# I need to fix this, along with custom meta in general, but for
# now we need to reinstate sane working defaults.
NewModel = construct_model(self)
new_desc = self
ModelSchemaEditor(OldModel).update_table(NewModel)
for new_field in NewModel._meta.fields:
if new_field.name == "id":
continue
old_field = self.find_old_field(OldModel, new_field)
if old_field:
FieldSchemaEditor(old_field).update_column(NewModel, new_field)
def do_migrations(self):
"""
Do a custom migration without leaving any migration files
around.
"""
old_desc = DynamicModel.objects.filter(name=self.name).first()
try:
OldModel = apps.get_model("django_models_from_csv", self.name)
except LookupError:
OldModel = None
NewModel = construct_model(self)
new_desc = self
# TODO: if new or name changed, run this (or just run it)
ModelSchemaEditor(OldModel).update_table(NewModel)
# TODO: figure out a way to reconcile the old columns/table
# with the new. we need a way to figure out what's been removed
# and added vs what's been changed.
# TODO: handle delete by checking for old fields not existing in new
for new_field in NewModel._meta.fields:
if new_field.name == "id":
continue
# TODO: ONLY call this when it's changed!
old_field = self.find_old_field(OldModel, new_field)
FieldSchemaEditor(old_field).update_column(NewModel, new_field)
def __init__(self, *args, **kwargs):
"""
Initialize the schema editor with the currently registered model and the
initial name.
"""
super().__init__(*args, **kwargs)
self._initial_name = self.name
initial_model = self.get_model(name=self._initial_name)
self.schema_editor = ModelSchemaEditor(initial_model)
def delete(self, **kwargs):
# first drop the table, we have to do this first, else
# django will complain about no content type existing
Model = apps.get_model("django_models_from_csv", self.name)
ModelSchemaEditor().drop_table(Model)
# then remove django app and content-types/permissions
app_config = apps.get_app_config("django_models_from_csv")
wipe_models_and_permissions(app_config, self.name)
# finally kill the row
super().delete(**kwargs)
# delete it from the django app registry
try:
del apps.all_models["django_models_from_csv"][self.name]
except KeyError as err:
raise LookupError("'{}' not found.".format(self.name))
# Unregister the model from the admin, before we wipe it out
try:
admin.site.unregister(Model)
except admin.sites.NotRegistered:
pass
def delete(self, **kwargs):
Model = apps.get_model("django_models_from_csv", self.name)
ModelSchemaEditor().drop_table(Model)
self.unregister_model(self.name)
super().delete(**kwargs)