south.db.postgresql_psycopg2: 44 total statements, 0.0% covered

Generated: Wed 2013-03-13 10:33 CET

Source file: /media/Envs/Envs/filer-gallery/lib/python2.7/site-packages/south/db/postgresql_psycopg2.py

Stats: 0 executed, 41 missed, 3 excluded, 45 ignored

1. import uuid
2. from django.db.backends.util import truncate_name
3. from south.db import generic
6. class DatabaseOperations(generic.DatabaseOperations):
8. """
9. PsycoPG2 implementation of database operations.
10. """
12. backend_name = "postgres"
14. def create_index_name(self, table_name, column_names, suffix=""):
15. """
16. Generate a unique name for the index
18. Django's logic for naming field indexes is different in the
19. postgresql_psycopg2 backend, so we follow that for single-column
20. indexes.
21. """
23. if len(column_names) == 1:
24. return truncate_name(
25. '%s_%s%s' % (table_name, column_names[0], suffix),
26. self._get_connection().ops.max_name_length()
27. )
28. return super(DatabaseOperations, self).create_index_name(table_name, column_names, suffix)
30. @generic.copy_column_constraints
31. @generic.delete_column_constraints
32. def rename_column(self, table_name, old, new):
33. if old == new:
34. # Short-circuit out
35. return []
36. self.execute('ALTER TABLE %s RENAME COLUMN %s TO %s;' % (
37. self.quote_name(table_name),
38. self.quote_name(old),
39. self.quote_name(new),
40. ))
42. @generic.invalidate_table_constraints
43. def rename_table(self, old_table_name, table_name):
44. "will rename the table and an associated ID sequence and primary key index"
45. # First, rename the table
46. generic.DatabaseOperations.rename_table(self, old_table_name, table_name)
47. # Then, try renaming the ID sequence
48. # (if you're using other AutoFields... your problem, unfortunately)
49. self.commit_transaction()
50. self.start_transaction()
51. try:
52. generic.DatabaseOperations.rename_table(self, old_table_name + "_id_seq", table_name + "_id_seq")
53. except:
54. if self.debug:
55. print " ~ No such sequence (ignoring error)"
56. self.rollback_transaction()
57. else:
58. self.commit_transaction()
59. self.start_transaction()
61. # Rename primary key index, will not rename other indices on
62. # the table that are used by django (e.g. foreign keys). Until
63. # figure out how, you need to do this yourself.
64. try:
65. generic.DatabaseOperations.rename_table(self, old_table_name + "_pkey", table_name + "_pkey")
66. except:
67. if self.debug:
68. print " ~ No such primary key (ignoring error)"
69. self.rollback_transaction()
70. else:
71. self.commit_transaction()
72. self.start_transaction()
74. def rename_index(self, old_index_name, index_name):
75. "Rename an index individually"
76. generic.DatabaseOperations.rename_table(self, old_index_name, index_name)
78. def _default_value_workaround(self, value):
79. "Support for UUIDs on psql"
80. if isinstance(value, uuid.UUID):
81. return str(value)
82. else:
83. return super(DatabaseOperations, self)._default_value_workaround(value)
85. def _db_type_for_alter_column(self, field):
86. return self._db_positive_type_for_alter_column(DatabaseOperations, field)
88. def _alter_add_column_mods(self, field, name, params, sqls):
89. return self._alter_add_positive_check(DatabaseOperations, field, name, params, sqls)