[1.1.X] Fixed #6054: work around PIL's installation brokeness by detecting either of the two ways it can end up being installed.

Backport of [12429] from trunk.

git-svn-id: http://code.djangoproject.com/svn/django/branches/releases/1.1.X@12430 bcc190cf-cafb-0310-a4f2-bffc1f526a37

django/core/files/images.py

@@ -30,7 +30,12 @@ class ImageFile(File):
 
 def get_image_dimensions(file_or_path):
     """Returns the (width, height) of an image, given an open file or a path."""
-    from PIL import ImageFile as PILImageFile
+    # Try to import PIL in either of the two ways it can end up installed.
+    try:
+        from PIL import ImageFile as PILImageFile
+    except ImportError:
+        import ImageFile as PILImageFile
+        
     p = PILImageFile.Parser()
     close = False
     if hasattr(file_or_path, 'read'):

django/core/management/validation.py

@@ -47,10 +47,14 @@ def get_validation_errors(outfile, app=None):
             if isinstance(f, models.FileField) and not f.upload_to:
                 e.add(opts, '"%s": FileFields require an "upload_to" attribute.' % f.name)
             if isinstance(f, models.ImageField):
+                # Try to import PIL in either of the two ways it can end up installed.
                 try:
                     from PIL import Image
                 except ImportError:
-                    e.add(opts, '"%s": To use ImageFields, you need to install the Python Imaging Library. Get it at http://www.pythonware.com/products/pil/ .' % f.name)
+                    try:
+                        import Image
+                    except ImportError:
+                        e.add(opts, '"%s": To use ImageFields, you need to install the Python Imaging Library. Get it at http://www.pythonware.com/products/pil/ .' % f.name)
             if isinstance(f, models.BooleanField) and getattr(f, 'null', False):
                 e.add(opts, '"%s": BooleanFields do not accept null values. Use a NullBooleanField instead.' % f.name)
             if f.choices:

django/forms/fields.py

@@ -483,7 +483,12 @@ class ImageField(FileField):
             return None
         elif not data and initial:
             return initial
-        from PIL import Image
+            
+        # Try to import PIL in either of the two ways it can end up installed.
+        try:
+            from PIL import Image
+        except ImportError:
+            import Image
 
         # We need to get a file object for PIL. We might have a path or we might
         # have to read the data into memory.

tests/modeltests/model_forms/models.py

@@ -99,11 +99,15 @@ class TextFile(models.Model):
         return self.description
 
 try:
-    # If PIL is available, try testing ImageFields.
+    # If PIL is available, try testing ImageFields. Checking for the existence
-    # Checking for the existence of Image is enough for CPython, but
+    # of Image is enough for CPython, but for PyPy, you need to check for the
-    # for PyPy, you need to check for the underlying modules
+    # underlying modules If PIL is not available, ImageField tests are omitted.
-    # If PIL is not available, ImageField tests are omitted.
+    # Try to import PIL in either of the two ways it can end up installed.
-    from PIL import Image, _imaging
+    try:
+        from PIL import Image, _imaging
+    except ImportError:
+        import Image, _imaging
+    
     test_images = True
 
     class ImageFile(models.Model):

tests/regressiontests/file_storage/tests.py

@@ -18,12 +18,16 @@ try:
 except ImportError:
     import dummy_threading as threading
 
+# Try to import PIL in either of the two ways it can end up installed.
+# Checking for the existence of Image is enough for CPython, but
+# for PyPy, you need to check for the underlying modules
 try:
-    # Checking for the existence of Image is enough for CPython, but
-    # for PyPy, you need to check for the underlying modules
     from PIL import Image, _imaging
 except ImportError:
-    Image = None
+    try:
+        import Image, _imaging
+    except ImportError:
+        Image = None
 
 class FileStorageTests(unittest.TestCase):
     storage_class = FileSystemStorage

tests/regressiontests/model_fields/models.py

@@ -6,12 +6,17 @@ try:
 except ImportError:
     from django.utils import _decimal as decimal    # Python 2.3 fallback
 
+# Try to import PIL in either of the two ways it can end up installed.
+# Checking for the existence of Image is enough for CPython, but for PyPy,
+# you need to check for the underlying modules.
+
 try:
-    # Checking for the existence of Image is enough for CPython, but for PyPy,
-    # you need to check for the underlying modules.
     from PIL import Image, _imaging
 except ImportError:
-    Image = None
+    try:
+        import Image, _imaging
+    except ImportError:
+        Image = None
 
 from django.core.files.storage import FileSystemStorage
 from django.db import models