south.management.commands.datamigration: 54 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/management/commands/datamigration.py

Stats: 0 executed, 41 missed, 13 excluded, 70 ignored

1. """
2. Data migration creation command
3. """
5. import sys
6. import os
7. import re
8. from optparse import make_option
10. try:
11. set
12. except NameError:
13. from sets import Set as set
15. from django.core.management.base import BaseCommand
16. from django.core.management.color import no_style
17. from django.db import models
18. from django.conf import settings
20. from south.migration import Migrations
21. from south.exceptions import NoMigrations
22. from south.creator import freezer
24. class Command(BaseCommand):
25. option_list = BaseCommand.option_list + (
26. make_option('--freeze', action='append', dest='freeze_list', type='string',
27. help='Freeze the specified app(s). Provide an app name with each; use the option multiple times for multiple apps'),
28. make_option('--stdout', action='store_true', dest='stdout', default=False,
29. help='Print the migration to stdout instead of writing it to a file.'),
30. )
31. help = "Creates a new template data migration for the given app"
32. usage_str = "Usage: ./manage.py datamigration appname migrationname [--stdout] [--freeze appname]"
34. def handle(self, app=None, name="", freeze_list=None, stdout=False, verbosity=1, **options):
36. # Any supposed lists that are None become empty lists
37. freeze_list = freeze_list or []
39. # --stdout means name = -
40. if stdout:
41. name = "-"
43. # Only allow valid names
44. if re.search('[^_\w]', name) and name != "-":
45. self.error("Migration names should contain only alphanumeric characters and underscores.")
47. # if not name, there's an error
48. if not name:
49. self.error("You must provide a name for this migration\n" + self.usage_str)
51. if not app:
52. self.error("You must provide an app to create a migration for.\n" + self.usage_str)
54. # Get the Migrations for this app (creating the migrations dir if needed)
55. migrations = Migrations(app, force_creation=True, verbose_creation=verbosity > 0)
57. # See what filename is next in line. We assume they use numbers.
58. new_filename = migrations.next_filename(name)
60. # Work out which apps to freeze
61. apps_to_freeze = self.calc_frozen_apps(migrations, freeze_list)
63. # So, what's in this file, then?
64. file_contents = MIGRATION_TEMPLATE % {
65. "frozen_models": freezer.freeze_apps_to_string(apps_to_freeze),
66. "complete_apps": apps_to_freeze and "complete_apps = [%s]" % (", ".join(map(repr, apps_to_freeze))) or ""
67. }
69. # - is a special name which means 'print to stdout'
70. if name == "-":
71. print file_contents
72. # Write the migration file if the name isn't -
73. else:
74. fp = open(os.path.join(migrations.migrations_dir(), new_filename), "w")
75. fp.write(file_contents)
76. fp.close()
77. print >>sys.stderr, "Created %s." % new_filename
79. def calc_frozen_apps(self, migrations, freeze_list):
80. """
81. Works out, from the current app, settings, and the command line options,
82. which apps should be frozen.
83. """
84. apps_to_freeze = []
85. for to_freeze in freeze_list:
86. if "." in to_freeze:
87. self.error("You cannot freeze %r; you must provide an app label, like 'auth' or 'books'." % to_freeze)
88. # Make sure it's a real app
89. if not models.get_app(to_freeze):
90. self.error("You cannot freeze %r; it's not an installed app." % to_freeze)
91. # OK, it's fine
92. apps_to_freeze.append(to_freeze)
93. if getattr(settings, 'SOUTH_AUTO_FREEZE_APP', True):
94. apps_to_freeze.append(migrations.app_label())
95. return apps_to_freeze
97. def error(self, message, code=1):
98. """
99. Prints the error, and exits with the given code.
100. """
101. print >>sys.stderr, message
102. sys.exit(code)
105. MIGRATION_TEMPLATE = """# -*- coding: utf-8 -*-
106. import datetime
107. from south.db import db
108. from south.v2 import DataMigration
109. from django.db import models
111. class Migration(DataMigration):
113. def forwards(self, orm):
114. "Write your forwards methods here."
115. # Note: Remember to use orm['appname.ModelName'] rather than "from appname.models..."
117. def backwards(self, orm):
118. "Write your backwards methods here."
120. models = %(frozen_models)s
122. %(complete_apps)s
123. symmetrical = True
124. """