78 lines
2.0 KiB
Python
78 lines
2.0 KiB
Python
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from django.contrib.postgres.signals import (
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get_citext_oids, get_hstore_oids, register_type_handlers,
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)
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from django.db.migrations.operations.base import Operation
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class CreateExtension(Operation):
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reversible = True
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def __init__(self, name):
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self.name = name
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def state_forwards(self, app_label, state):
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pass
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def database_forwards(self, app_label, schema_editor, from_state, to_state):
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if schema_editor.connection.vendor != 'postgresql':
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return
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schema_editor.execute("CREATE EXTENSION IF NOT EXISTS %s" % schema_editor.quote_name(self.name))
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# Clear cached, stale oids.
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get_hstore_oids.cache_clear()
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get_citext_oids.cache_clear()
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# Registering new type handlers cannot be done before the extension is
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# installed, otherwise a subsequent data migration would use the same
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# connection.
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register_type_handlers(schema_editor.connection)
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def database_backwards(self, app_label, schema_editor, from_state, to_state):
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schema_editor.execute("DROP EXTENSION %s" % schema_editor.quote_name(self.name))
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# Clear cached, stale oids.
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get_hstore_oids.cache_clear()
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get_citext_oids.cache_clear()
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def describe(self):
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return "Creates extension %s" % self.name
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class BtreeGinExtension(CreateExtension):
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def __init__(self):
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self.name = 'btree_gin'
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class BtreeGistExtension(CreateExtension):
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def __init__(self):
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self.name = 'btree_gist'
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class CITextExtension(CreateExtension):
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def __init__(self):
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self.name = 'citext'
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class CryptoExtension(CreateExtension):
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def __init__(self):
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self.name = 'pgcrypto'
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class HStoreExtension(CreateExtension):
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def __init__(self):
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self.name = 'hstore'
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class TrigramExtension(CreateExtension):
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def __init__(self):
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self.name = 'pg_trgm'
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class UnaccentExtension(CreateExtension):
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def __init__(self):
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self.name = 'unaccent'
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