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Code Issues 32 Releases Wiki Activity

Fixed #34529, Refs #34525 -- Reduced index operations with Meta.indexes/index_together when optimizing migrations.

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This makes squashing migrations an available path for changing
Meta.index_together, which is deprecated, to Meta.indexes.

Follow up to f810325721.
This commit is contained in:
Mariusz Felisiak
2023-05-03 13:06:19 +02:00
committed by GitHub
parent 83339d2103
commit 8e2460d599
5 changed files with 326 additions and 68 deletions
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65
django/db/migrations/operations/models.py
View File

@@ -303,6 +303,71 @@ class CreateModel(ModelOperation):
managers=self.managers,
),
]
elif (
isinstance(operation, IndexOperation)
and self.name_lower == operation.model_name_lower
):
if isinstance(operation, AddIndex):
return [
CreateModel(
self.name,
fields=self.fields,
options={
**self.options,
"indexes": [
*self.options.get("indexes", []),
operation.index,
],
},
bases=self.bases,
managers=self.managers,
),
]
elif isinstance(operation, RemoveIndex):
options_indexes = [
index
for index in self.options.get("indexes", [])
if index.name != operation.name
]
return [
CreateModel(
self.name,
fields=self.fields,
options={
**self.options,
"indexes": options_indexes,
},
bases=self.bases,
managers=self.managers,
),
]
elif isinstance(operation, RenameIndex) and operation.old_fields:
options_index_together = {
fields
for fields in self.options.get("index_together", [])
if fields != operation.old_fields
}
if options_index_together:
self.options["index_together"] = options_index_together
else:
self.options.pop("index_together", None)
return [
CreateModel(
self.name,
fields=self.fields,
options={
**self.options,
"indexes": [
*self.options.get("indexes", []),
models.Index(
fields=operation.old_fields, name=operation.new_name
),
],
},
bases=self.bases,
managers=self.managers,
),
]
return super().reduce(operation, app_label)