88 lines
4.0 KiB
Python
88 lines
4.0 KiB
Python
import psycopg2.extensions
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from django.db.backends.creation import BaseDatabaseCreation
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from django.db.backends.util import truncate_name
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class DatabaseCreation(BaseDatabaseCreation):
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# This dictionary maps Field objects to their associated PostgreSQL column
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# types, as strings. Column-type strings can contain format strings; they'll
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# be interpolated against the values of Field.__dict__ before being output.
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# If a column type is set to None, it won't be included in the output.
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data_types = {
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'AutoField': 'serial',
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'BooleanField': 'boolean',
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'CharField': 'varchar(%(max_length)s)',
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'CommaSeparatedIntegerField': 'varchar(%(max_length)s)',
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'DateField': 'date',
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'DateTimeField': 'timestamp with time zone',
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'DecimalField': 'numeric(%(max_digits)s, %(decimal_places)s)',
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'FileField': 'varchar(%(max_length)s)',
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'FilePathField': 'varchar(%(max_length)s)',
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'FloatField': 'double precision',
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'IntegerField': 'integer',
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'BigIntegerField': 'bigint',
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'IPAddressField': 'inet',
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'GenericIPAddressField': 'inet',
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'NullBooleanField': 'boolean',
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'OneToOneField': 'integer',
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'PositiveIntegerField': 'integer CHECK ("%(column)s" >= 0)',
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'PositiveSmallIntegerField': 'smallint CHECK ("%(column)s" >= 0)',
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'SlugField': 'varchar(%(max_length)s)',
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'SmallIntegerField': 'smallint',
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'TextField': 'text',
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'TimeField': 'time',
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}
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def sql_table_creation_suffix(self):
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assert self.connection.settings_dict['TEST_COLLATION'] is None, "PostgreSQL does not support collation setting at database creation time."
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if self.connection.settings_dict['TEST_CHARSET']:
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return "WITH ENCODING '%s'" % self.connection.settings_dict['TEST_CHARSET']
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return ''
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def sql_indexes_for_field(self, model, f, style):
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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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db_table = model._meta.db_table
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tablespace = f.db_tablespace or model._meta.db_tablespace
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if tablespace:
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tablespace_sql = self.connection.ops.tablespace_sql(tablespace)
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if tablespace_sql:
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tablespace_sql = ' ' + tablespace_sql
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else:
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tablespace_sql = ''
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def get_index_sql(index_name, opclass=''):
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return (style.SQL_KEYWORD('CREATE INDEX') + ' ' +
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style.SQL_TABLE(qn(truncate_name(index_name,self.connection.ops.max_name_length()))) + ' ' +
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style.SQL_KEYWORD('ON') + ' ' +
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style.SQL_TABLE(qn(db_table)) + ' ' +
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"(%s%s)" % (style.SQL_FIELD(qn(f.column)), opclass) +
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"%s;" % tablespace_sql)
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output = [get_index_sql('%s_%s' % (db_table, f.column))]
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# Fields with database column types of `varchar` and `text` need
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# a second index that specifies their operator class, which is
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# needed when performing correct LIKE queries outside the
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# C locale. See #12234.
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db_type = f.db_type(connection=self.connection)
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if db_type.startswith('varchar'):
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output.append(get_index_sql('%s_%s_like' % (db_table, f.column),
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' varchar_pattern_ops'))
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elif db_type.startswith('text'):
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output.append(get_index_sql('%s_%s_like' % (db_table, f.column),
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' text_pattern_ops'))
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else:
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output = []
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return output
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def set_autocommit(self):
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self._prepare_for_test_db_ddl()
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def _prepare_for_test_db_ddl(self):
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"""Rollback and close the active transaction."""
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self.connection.connection.rollback()
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self.connection.connection.set_isolation_level(
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psycopg2.extensions.ISOLATION_LEVEL_AUTOCOMMIT)
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