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Code Issues 32 Releases Wiki Activity

Fixed #27676 -- Allowed BLOB/TEXT defaults on MariaDB 10.2.1+.

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This commit is contained in:
Adam Johnson
2019-08-14 15:52:04 +01:00
committed by Mariusz Felisiak
parent 8a281aa7fe
commit 7da6a28a44
3 changed files with 20 additions and 9 deletions
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8
django/db/backends/mysql/base.py
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@@ -130,9 +130,11 @@ class DatabaseWrapper(BaseDatabaseWrapper):
'UUIDField': 'char(32)',
}
# For these columns, MySQL doesn't:
# - accept default values and implicitly treats these columns as nullable
# - support a database index
# For these data types:
# - MySQL and MariaDB < 10.2.1 don't accept default values and implicitly
# treat them as nullable
# - all versions of MySQL and MariaDB don't support full width database
# indexes
_limited_data_types = (
'tinyblob', 'blob', 'mediumblob', 'longblob', 'tinytext', 'text',
'mediumtext', 'longtext', 'json',

11
django/db/backends/mysql/schema.py
View File

@@ -48,7 +48,16 @@ class DatabaseSchemaEditor(BaseDatabaseSchemaEditor):
return db_type is not None and db_type.lower() in self.connection._limited_data_types
def skip_default(self, field):
return self._is_limited_data_type(field)
if not self._supports_limited_data_type_defaults:
return self._is_limited_data_type(field)
return False
@property
def _supports_limited_data_type_defaults(self):
# Only MariaDB >= 10.2.1 supports defaults for BLOB and TEXT.
if self.connection.mysql_is_mariadb:
return self.connection.mysql_version >= (10, 2, 1)
return False
def add_field(self, model, field):
super().add_field(model, field)