mirror of https://github.com/django/django.git
Fixed #12977 -- Ensure that indexes don't exceed character limits on MySQL. Thanks to carljm for the original report, and hgeerts@osso.nl for the patch.
git-svn-id: http://code.djangoproject.com/svn/django/trunk@13040 bcc190cf-cafb-0310-a4f2-bffc1f526a37
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@ -260,6 +260,8 @@ class BaseDatabaseCreation(object):
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def sql_indexes_for_field(self, model, f, style):
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def sql_indexes_for_field(self, model, f, style):
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"Return the CREATE INDEX SQL statements for a single model field"
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"Return the CREATE INDEX SQL statements for a single model field"
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from django.db.backends.util import truncate_name
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if f.db_index and not f.unique:
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if f.db_index and not f.unique:
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qn = self.connection.ops.quote_name
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qn = self.connection.ops.quote_name
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tablespace = f.db_tablespace or model._meta.db_tablespace
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tablespace = f.db_tablespace or model._meta.db_tablespace
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@ -271,8 +273,9 @@ class BaseDatabaseCreation(object):
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tablespace_sql = ''
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tablespace_sql = ''
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else:
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else:
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tablespace_sql = ''
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tablespace_sql = ''
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i_name = '%s_%s' % (model._meta.db_table, self._digest(f.column))
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output = [style.SQL_KEYWORD('CREATE INDEX') + ' ' +
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output = [style.SQL_KEYWORD('CREATE INDEX') + ' ' +
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style.SQL_TABLE(qn('%s_%s' % (model._meta.db_table, f.column))) + ' ' +
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style.SQL_TABLE(qn(truncate_name(i_name, self.connection.ops.max_name_length()))) + ' ' +
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style.SQL_KEYWORD('ON') + ' ' +
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style.SQL_KEYWORD('ON') + ' ' +
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style.SQL_TABLE(qn(model._meta.db_table)) + ' ' +
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style.SQL_TABLE(qn(model._meta.db_table)) + ' ' +
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"(%s)" % style.SQL_FIELD(qn(f.column)) +
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"(%s)" % style.SQL_FIELD(qn(f.column)) +
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@ -227,6 +227,9 @@ class DatabaseOperations(BaseDatabaseOperations):
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second = '%s-12-31 23:59:59.99'
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second = '%s-12-31 23:59:59.99'
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return [first % value, second % value]
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return [first % value, second % value]
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def max_name_length(self):
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return 64
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class DatabaseWrapper(BaseDatabaseWrapper):
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class DatabaseWrapper(BaseDatabaseWrapper):
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operators = {
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operators = {
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