Fixed #10196: Restored setting of image file width and height fields lost in r9766, and added tests for this function. Thanks to vicvicvic for the ticket and patch and for Alex for reminding me not to break non-PIL-boxes with the new tests.

git-svn-id: http://code.djangoproject.com/svn/django/trunk@9841 bcc190cf-cafb-0310-a4f2-bffc1f526a37

AUTHORS

@@ -35,6 +35,7 @@ answer newbie questions, and generally made Django that much better:
     Jeff Anderson <jefferya@programmerq.net>
     Marian Andre <django@andre.sk>
     Andreas
+    Victor Andrée    
     andy@jadedplanet.net
     Fabrice Aneche <akh@nobugware.com>
     ant9000@netwise.it

django/db/models/fields/files.py

@@ -132,7 +132,7 @@ class FileDescriptor(object):
             # have the FieldFile interface added to them
             file_copy = copy.copy(file)
             file_copy.__class__ = type(file.__class__.__name__, 
-                                       (file.__class__, FieldFile), {})
+                                       (file.__class__, self.field.attr_class), {})
             file_copy.instance = instance
             file_copy.field = self.field
             file_copy.storage = self.field.storage

tests/modeltests/model_forms/models.py

@@ -98,26 +98,47 @@ class TextFile(models.Model):
     def __unicode__(self):
         return self.description
 
+try:
+    # If PIL is available, try testing ImageFields.
+    # Checking for the existence of Image is enough for CPython, but
+    # for PyPy, you need to check for the underlying modules
+    # If PIL is not available, ImageField tests are omitted.
+    from PIL import Image, _imaging
+    test_images = True
+    
     class ImageFile(models.Model):
         def custom_upload_path(self, filename):
             path = self.path or 'tests'
             return '%s/%s' % (path, filename)
     
         description = models.CharField(max_length=20)
-    try:
-        # If PIL is available, try testing PIL.
-        # Checking for the existence of Image is enough for CPython, but
-        # for PyPy, you need to check for the underlying modules
-        # If PIL is not available, this test is equivalent to TextFile above.
-        from PIL import Image, _imaging
-        image = models.ImageField(storage=temp_storage, upload_to=custom_upload_path)
-    except ImportError:
-        image = models.FileField(storage=temp_storage, upload_to=custom_upload_path)
+        image = models.ImageField(storage=temp_storage, upload_to=custom_upload_path,
+                                  width_field='width', height_field='height')
+        width = models.IntegerField(editable=False)
+        height = models.IntegerField(editable=False)
         path = models.CharField(max_length=16, blank=True, default='')
 
         def __unicode__(self):
             return self.description
     
+    class OptionalImageFile(models.Model):
+        def custom_upload_path(self, filename):
+            path = self.path or 'tests'
+            return '%s/%s' % (path, filename)
+    
+        description = models.CharField(max_length=20)
+        image = models.ImageField(storage=temp_storage, upload_to=custom_upload_path,
+                                  width_field='width', height_field='height', 
+                                  blank=True, null=True)
+        width = models.IntegerField(editable=False, null=True)
+        height = models.IntegerField(editable=False, null=True)
+        path = models.CharField(max_length=16, blank=True, default='')
+
+        def __unicode__(self):
+            return self.description
+except ImportError:
+    test_images = False
+    
 class CommaSeparatedInteger(models.Model):
     field = models.CommaSeparatedIntegerField(max_length=20)
 
@@ -1056,7 +1077,10 @@ True
 # Delete the current file since this is not done by Django.
 >>> instance.file.delete()
 >>> instance.delete()
+"""}
 
+if test_images:
+    __test__['API_TESTS'] += """
 # ImageField ###################################################################
 
 # ImageField and FileField are nearly identical, but they differ slighty when
@@ -1068,6 +1092,7 @@ True
 ...         model = ImageFile
 
 >>> image_data = open(os.path.join(os.path.dirname(__file__), "test.png"), 'rb').read()
+>>> image_data2 = open(os.path.join(os.path.dirname(__file__), "test2.png"), 'rb').read()
 
 >>> f = ImageFileForm(data={'description': u'An image'}, files={'image': SimpleUploadedFile('test.png', image_data)})
 >>> f.is_valid()
@@ -1077,6 +1102,10 @@ True
 >>> instance = f.save()
 >>> instance.image
 <...FieldFile: tests/test.png>
+>>> instance.width
+16
+>>> instance.height
+16
 
 # Delete the current file since this is not done by Django.
 >>> instance.image.delete()
@@ -1089,8 +1118,12 @@ True
 >>> instance = f.save()
 >>> instance.image
 <...FieldFile: tests/test.png>
+>>> instance.width
+16
+>>> instance.height
+16
 
-# Edit an instance that already has the image defined in the model. This will not
+# Edit an instance that already has the (required) image defined in the model. This will not
 # save the image again, but leave it exactly as it is.
 
 >>> f = ImageFileForm(data={'description': u'Look, it changed'}, instance=instance)
@@ -1101,6 +1134,10 @@ True
 >>> instance = f.save()
 >>> instance.image
 <...FieldFile: tests/test.png>
+>>> instance.height
+16
+>>> instance.width
+16
 
 # Delete the current image since this is not done by Django.
 
@@ -1108,23 +1145,31 @@ True
 
 # Override the file by uploading a new one.
 
->>> f = ImageFileForm(data={'description': u'Changed it'}, files={'image': SimpleUploadedFile('test2.png', image_data)}, instance=instance)
+>>> f = ImageFileForm(data={'description': u'Changed it'}, files={'image': SimpleUploadedFile('test2.png', image_data2)}, instance=instance)
 >>> f.is_valid()
 True
 >>> instance = f.save()
 >>> instance.image
 <...FieldFile: tests/test2.png>
+>>> instance.height
+32
+>>> instance.width
+48
 
 # Delete the current file since this is not done by Django.
 >>> instance.image.delete()
 >>> instance.delete()
 
->>> f = ImageFileForm(data={'description': u'Changed it'}, files={'image': SimpleUploadedFile('test2.png', image_data)})
+>>> f = ImageFileForm(data={'description': u'Changed it'}, files={'image': SimpleUploadedFile('test2.png', image_data2)})
 >>> f.is_valid()
 True
 >>> instance = f.save()
 >>> instance.image
 <...FieldFile: tests/test2.png>
+>>> instance.height
+32
+>>> instance.width
+48
 
 # Delete the current file since this is not done by Django.
 >>> instance.image.delete()
@@ -1132,31 +1177,58 @@ True
 
 # Test the non-required ImageField
 
->>> f = ImageFileForm(data={'description': u'Test'})
->>> f.fields['image'].required = False
+>>> class OptionalImageFileForm(ModelForm):
+...     class Meta:
+...         model = OptionalImageFile
+
+>>> f = OptionalImageFileForm(data={'description': u'Test'})
 >>> f.is_valid()
 True
 >>> instance = f.save()
 >>> instance.image
 <...FieldFile: None>
+>>> instance.width
+>>> instance.height
 
->>> f = ImageFileForm(data={'description': u'And a final one'}, files={'image': SimpleUploadedFile('test3.png', image_data)}, instance=instance)
+>>> f = OptionalImageFileForm(data={'description': u'And a final one'}, files={'image': SimpleUploadedFile('test3.png', image_data)}, instance=instance)
 >>> f.is_valid()
 True
 >>> instance = f.save()
 >>> instance.image
 <...FieldFile: tests/test3.png>
+>>> instance.width
+16
+>>> instance.height
+16
+
+# Editing the instance without re-uploading the image should not affect the image or its width/height properties
+>>> f = OptionalImageFileForm(data={'description': u'New Description'}, instance=instance)
+>>> f.is_valid()
+True
+>>> instance = f.save()
+>>> instance.description
+u'New Description'
+>>> instance.image
+<...FieldFile: tests/test3.png>
+>>> instance.width
+16
+>>> instance.height
+16
 
 # Delete the current file since this is not done by Django.
 >>> instance.image.delete()
 >>> instance.delete()
 
->>> f = ImageFileForm(data={'description': u'And a final one'}, files={'image': SimpleUploadedFile('test3.png', image_data)})
+>>> f = OptionalImageFileForm(data={'description': u'And a final one'}, files={'image': SimpleUploadedFile('test4.png', image_data2)})
 >>> f.is_valid()
 True
 >>> instance = f.save()
 >>> instance.image
-<...FieldFile: tests/test3.png>
+<...FieldFile: tests/test4.png>
+>>> instance.width
+48
+>>> instance.height
+32
 >>> instance.delete()
 
 # Test callable upload_to behavior that's dependent on the value of another field in the model
@@ -1167,6 +1239,9 @@ True
 >>> instance.image
 <...FieldFile: foo/test4.png>
 >>> instance.delete()
+"""
+
+__test__['API_TESTS'] += """
 
 # Media on a ModelForm ########################################################
 
@@ -1355,4 +1430,4 @@ ValidationError: [u'Select a valid choice. z is not one of the available choices
 # Clean up
 >>> import shutil
 >>> shutil.rmtree(temp_storage_dir)
-"""}
+"""