Fixed #11696: Changed app loading code so that it does not swallow import errors that used to be (prior to r10088) raised.

git-svn-id: http://code.djangoproject.com/svn/django/trunk@12950 bcc190cf-cafb-0310-a4f2-bffc1f526a37

django/db/models/loading.py

@@ -5,6 +5,7 @@ from django.core.exceptions import ImproperlyConfigured
 from django.utils.datastructures import SortedDict
 from django.utils.importlib import import_module
 
+import imp
 import sys
 import os
 import threading
@@ -71,8 +72,9 @@ class AppCache(object):
         """
         self.handled[app_name] = None
         self.nesting_level += 1
+        app_module = import_module(app_name)
         try:
-            models = import_module('.models', app_name)
+            imp.find_module('models', app_module.__path__)
         except ImportError:
             self.nesting_level -= 1
             if can_postpone:
@@ -82,6 +84,7 @@ class AppCache(object):
                 # populate).
                 self.postponed.append(app_name)
             return None
+        models = import_module('.models', app_name)
         self.nesting_level -= 1
         if models not in self.app_store:
             self.app_store[models] = len(self.app_store)

tests/regressiontests/admin_scripts/broken_app/models.py

@@ -0,0 +1 @@
+from django.db import modelz

tests/regressiontests/admin_scripts/tests.py

@@ -13,7 +13,7 @@ from django import conf, bin, get_version
 from django.conf import settings
 
 class AdminScriptTestCase(unittest.TestCase):
-    def write_settings(self, filename, apps=None, is_dir=False):
+    def write_settings(self, filename, apps=None, is_dir=False, sdict=None):
         test_dir = os.path.dirname(os.path.dirname(__file__))
         if is_dir:
             settings_dir = os.path.join(test_dir,filename)
@@ -39,6 +39,10 @@ class AdminScriptTestCase(unittest.TestCase):
         if apps:
             settings_file.write("INSTALLED_APPS = %s\n" % apps)
 
+        if sdict:
+            for k, v in sdict.items():
+                settings_file.write("%s = %s\n" % (k, v))
+
         settings_file.close()
 
     def remove_settings(self, filename, is_dir=False):
@@ -952,6 +956,28 @@ class ManageMultipleSettings(AdminScriptTestCase):
         self.assertNoOutput(out)
         self.assertOutput(err, "Unknown command: 'noargs_command'")
 
+
+class ManageValidateImportErrorsReported(AdminScriptTestCase):
+    def tearDown(self):
+        self.remove_settings('settings.py')
+
+    def test_nonexistent_app(self):
+        "manage.py validate reports an error on a non-existent app in INSTALLED_APPS"
+        self.write_settings('settings.py', apps=['admin_scriptz.broken_app'], sdict={'USE_I18N': False})
+        args = ['validate']
+        out, err = self.run_manage(args)
+        self.assertNoOutput(out)
+        self.assertOutput(err, 'No module named admin_scriptz.broken_app')
+
+    def test_broken_app(self):
+        "manage.py validate reports an ImportError if an app's models.py raises one on import"
+        self.write_settings('settings.py', apps=['admin_scripts.broken_app'])
+        args = ['validate']
+        out, err = self.run_manage(args)
+        self.assertNoOutput(out)
+        self.assertOutput(err, 'ImportError')
+       
+
 ##########################################################################
 # COMMAND PROCESSING TESTS
 # Check that user-space commands are correctly handled - in particular,