Kode sumber untuk django.contrib.postgres.operations

from django.contrib.postgres.signals import register_hstore_handler
from django.db.migrations.operations.base import Operation

[docs]class CreateExtension(Operation): reversible = True def __init__(self, name): self.name = name def state_forwards(self, app_label, state): pass def database_forwards(self, app_label, schema_editor, from_state, to_state): if schema_editor.connection.vendor != 'postgresql': return schema_editor.execute("CREATE EXTENSION IF NOT EXISTS %s" % self.name) def database_backwards(self, app_label, schema_editor, from_state, to_state): schema_editor.execute("DROP EXTENSION %s" % self.name) def describe(self): return "Creates extension %s" % self.name
[docs]class HStoreExtension(CreateExtension): def __init__(self): self.name = 'hstore' def database_forwards(self, app_label, schema_editor, from_state, to_state): super(HStoreExtension, self).database_forwards(app_label, schema_editor, from_state, to_state) # Register hstore straight away as it cannot be done before the # extension is installed, a subsequent data migration would use the # same connection register_hstore_handler(schema_editor.connection)
[docs]class UnaccentExtension(CreateExtension): def __init__(self): self.name = 'unaccent'
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