Merge pull request #1134 from senko/ticket_18990

Fixed #18990: Loaddata now complains if fixture doesn't exist

django/core/management/commands/loaddata.py

@@ -4,6 +4,7 @@ import os
 import gzip
 import zipfile
 from optparse import make_option
+import warnings
 
 from django.conf import settings
 from django.core import serializers
@@ -162,9 +163,14 @@ class Command(BaseCommand):
         else:
             fixture_dirs = app_fixtures + list(settings.FIXTURE_DIRS) + ['']
 
+        label_found = False
         for fixture_dir in fixture_dirs:
-            self.process_dir(fixture_dir, fixture_name, compression_formats,
-                             formats)
+            found = self.process_dir(fixture_dir, fixture_name,
+                compression_formats, formats)
+            label_found = label_found or found
+
+        if fixture_name != 'initial_data' and not label_found:
+            warnings.warn("No fixture named '%s' found." % fixture_name)
 
     def process_dir(self, fixture_dir, fixture_name, compression_formats,
                     serialization_formats):
@@ -242,3 +248,5 @@ class Command(BaseCommand):
                     raise CommandError(
                         "No fixture data found for '%s'. (File format may be invalid.)" %
                             (fixture_name))
+
+        return label_found

tests/fixtures/tests.py

@@ -1,5 +1,7 @@
 from __future__ import absolute_import
 
+import warnings
+
 from django.contrib.sites.models import Site
 from django.core import management
 from django.db import connection, IntegrityError
@@ -137,8 +139,18 @@ class FixtureLoadingTests(DumpDataAssertMixin, TestCase):
             '<Book: Music for all ages by Artist formerly known as "Prince" and Django Reinhardt>'
         ])
 
-        # Load a fixture that doesn't exist
-        management.call_command('loaddata', 'unknown.json', verbosity=0, commit=False)
+        # Loading a fixture that doesn't exist emits a warning
+        with warnings.catch_warnings(record=True) as w:
+            management.call_command('loaddata', 'unknown.json', verbosity=0,
+                commit=False)
+        self.assertEqual(len(w), 1)
+        self.assertTrue(w[0].message, "No fixture named 'unknown' found.")
+
+        # An attempt to load a nonexistent 'initial_data' fixture isn't an error
+        with warnings.catch_warnings(record=True) as w:
+            management.call_command('loaddata', 'initial_data.json', verbosity=0,
+                commit=False)
+        self.assertEqual(len(w), 0)
 
         # object list is unaffected
         self.assertQuerysetEqual(Article.objects.all(), [
@@ -273,10 +285,11 @@ class FixtureLoadingTests(DumpDataAssertMixin, TestCase):
 
     def test_unmatched_identifier_loading(self):
         # Try to load db fixture 3. This won't load because the database identifier doesn't match
-        management.call_command('loaddata', 'db_fixture_3', verbosity=0, commit=False)
-        self.assertQuerysetEqual(Article.objects.all(), [])
+        with warnings.catch_warnings(record=True):
+            management.call_command('loaddata', 'db_fixture_3', verbosity=0, commit=False)
 
-        management.call_command('loaddata', 'db_fixture_3', verbosity=0, using='default', commit=False)
+        with warnings.catch_warnings(record=True):
+            management.call_command('loaddata', 'db_fixture_3', verbosity=0, using='default', commit=False)
         self.assertQuerysetEqual(Article.objects.all(), [])
 
     def test_output_formats(self):

tests/fixtures_model_package/tests.py

@@ -1,5 +1,7 @@
 from __future__ import unicode_literals
 
+import warnings
+
 from django.core import management
 from django.db import transaction
 from django.test import TestCase, TransactionTestCase
@@ -100,7 +102,9 @@ class FixtureTestCase(TestCase):
         )
 
         # Load a fixture that doesn't exist
-        management.call_command("loaddata", "unknown.json", verbosity=0, commit=False)
+        with warnings.catch_warnings(record=True):
+            management.call_command("loaddata", "unknown.json", verbosity=0, commit=False)
+
         self.assertQuerysetEqual(
             Article.objects.all(), [
                 "Django conquers world!",

tests/fixtures_regress/tests.py

@@ -4,6 +4,7 @@ from __future__ import absolute_import, unicode_literals
 
 import os
 import re
+import warnings
 
 from django.core.serializers.base import DeserializationError
 from django.core import management
@@ -441,13 +442,14 @@ class TestFixtures(TestCase):
 
     def test_loaddata_not_existant_fixture_file(self):
         stdout_output = StringIO()
-        management.call_command(
-            'loaddata',
-            'this_fixture_doesnt_exist',
-            verbosity=2,
-            commit=False,
-            stdout=stdout_output,
-        )
+        with warnings.catch_warnings(record=True):
+            management.call_command(
+                'loaddata',
+                'this_fixture_doesnt_exist',
+                verbosity=2,
+                commit=False,
+                stdout=stdout_output,
+            )
         self.assertTrue("No xml fixture 'this_fixture_doesnt_exist' in" in
             force_text(stdout_output.getvalue()))