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Refs #29000 -- Restored delayed model rendering of RenameField. 

Non-delayed rendering is unnecessary and wasteful now that state models
relationship consistency on delayed reload is ensured.

This partly reverts commit fcc4e251db.
This commit is contained in:
Simon Charette 2020-04-05 01:26:13 -04:00 committed by Mariusz Felisiak
parent 1d16c5d562
commit ad811335bd
1 changed files with 6 additions and 7 deletions
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13
django/db/migrations/operations/fields.py
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@ -304,11 +304,16 @@ class RenameField(FieldOperation):
# Rename the field
fields = model_state.fields
found = False
delay = True
for index, (name, field) in enumerate(fields):
if not found and name == self.old_name:
fields[index] = (self.new_name, field)
found = True
# Delay rendering of relationships if it's not a relational
# field and not referenced by a foreign key.
delay = (
not field.is_relation and
not is_referenced_by_foreign_key(state, self.model_name_lower, field, self.name)
)
# Fix from_fields to refer to the new field.
from_fields = getattr(field, 'from_fields', None)
if from_fields:
@ -316,12 +321,6 @@ class RenameField(FieldOperation):
self.new_name if from_field_name == self.old_name else from_field_name
for from_field_name in from_fields
])
# Delay rendering of relationships if it's not a relational
# field and not referenced by a foreign key.
delay = delay and (
not field.is_relation and
not is_referenced_by_foreign_key(state, self.model_name_lower, field, self.name)
)
if not found:
raise FieldDoesNotExist(
"%s.%s has no field named '%s'" % (app_label, self.model_name, self.old_name)