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ImageField causing error when rendering with "The Image" attribute has no file associated with it.
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mermer  
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 More options Feb 19 2009, 7:30 am
From: mermer <merme...@googlemail.com>
Date: Thu, 19 Feb 2009 04:30:54 -0800 (PST)
Local: Thurs, Feb 19 2009 7:30 am
Subject: ImageField causing error when rendering with "The Image" attribute has no file associated with it.
Print | Individual message | Show original | Report this message | Find messages by this author
Since I've upgraded to Django ver 1.00,  I'm suddenly getting the
following error with my ImageFields.

The tag is {{ model.image.url}} and it throws an error if the image
field in the database is null (even if it is set to null in the model)

Am I missing something?  Here is the error message being generated.

TemplateSyntaxError at /offer_detail_ver2/1/

Caught an exception while rendering: The 'image' attribute has no file
associated with it.

Original Traceback (most recent call last):
  File "C:\Python25\Lib\site-packages\django-trunk\django\template
\debug.py", line 71, in render_node
    result = node.render(context)
  File "C:\Python25\Lib\site-packages\django-trunk\django\template
\debug.py", line 87, in render
    output = force_unicode(self.filter_expression.resolve(context))
  File "C:\Python25\Lib\site-packages\django-trunk\django\template
\__init__.py", line 535, in resolve
    obj = self.var.resolve(context)
  File "C:\Python25\Lib\site-packages\django-trunk\django\template
\__init__.py", line 676, in resolve
    value = self._resolve_lookup(context)
  File "C:\Python25\Lib\site-packages\django-trunk\django\template
\__init__.py", line 705, in _resolve_lookup
    current = getattr(current, bit)
  File "C:\Python25\Lib\site-packages\django-trunk\django\db\models
\fields\files.py", line 58, in _get_url
    self._require_file()
  File "C:\Python25\Lib\site-packages\django-trunk\django\db\models
\fields\files.py", line 43, in _require_file
    raise ValueError("The '%s' attribute has no file associated with
it." % self.field.name)
ValueError: The 'image' attribute has no file associated with it.

Request Method:         GET
Request URL:    http://localhost/offer_detail_ver2/1/
Exception Type:         TemplateSyntaxError
Exception Value:

Caught an exception while rendering: The 'image' attribute has no file
associated with it.

Original Traceback (most recent call last):
  File "C:\Python25\Lib\site-packages\django-trunk\django\template
\debug.py", line 71, in render_node
    result = node.render(context)
  File "C:\Python25\Lib\site-packages\django-trunk\django\template
\debug.py", line 87, in render
    output = force_unicode(self.filter_expression.resolve(context))
  File "C:\Python25\Lib\site-packages\django-trunk\django\template
\__init__.py", line 535, in resolve
    obj = self.var.resolve(context)
  File "C:\Python25\Lib\site-packages\django-trunk\django\template
\__init__.py", line 676, in resolve
    value = self._resolve_lookup(context)
  File "C:\Python25\Lib\site-packages\django-trunk\django\template
\__init__.py", line 705, in _resolve_lookup
    current = getattr(current, bit)
  File "C:\Python25\Lib\site-packages\django-trunk\django\db\models
\fields\files.py", line 58, in _get_url
    self._require_file()
  File "C:\Python25\Lib\site-packages\django-trunk\django\db\models
\fields\files.py", line 43, in _require_file
    raise ValueError("The '%s' attribute has no file associated with
it." % self.field.name)
ValueError: The 'image' attribute has no file associated with it.

C:\Python25\Lib\site-packages\django-trunk\django\template\debug.py in
render_node

  74. e.source = node.source
  75. raise
  76. except Exception, e:
  77. from sys import exc_info
  78. wrapped = TemplateSyntaxError(u'Caught an exception while
rendering: %s' % force_unicode(e, errors='replace'))
  79. wrapped.source = node.source
  80. wrapped.exc_info = exc_info()

  81. raise wrapped  # error highlighted on this line

  82. return result
  83.
  84. class DebugVariableNode(VariableNode):
  85. def render(self, context):
  86. try:
  87. output = force_unicode(self.filter_expression.resolve(context))


 
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mermer  
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 More options Feb 23 2009, 12:54 pm
From: mermer <merme...@googlemail.com>
Date: Mon, 23 Feb 2009 09:54:32 -0800 (PST)
Local: Mon, Feb 23 2009 12:54 pm
Subject: Re: ImageField causing error when rendering with "The Image" attribute has no file associated with it.
Print | Individual message | Show original | Report this message | Find messages by this author
Anybody with any advice on this.  Ever since wev'e upgraded to version
1.00 we are having issues with the ImageField

ValueError: The 'image' attribute has no file associated with it.

On 19 Feb, 12:30, mermer <merme...@googlemail.com> wrote:


 
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Karen Tracey  
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 More options Feb 23 2009, 3:40 pm
From: Karen Tracey <kmtra...@gmail.com>
Date: Mon, 23 Feb 2009 15:40:22 -0500
Local: Mon, Feb 23 2009 3:40 pm
Subject: Re: ImageField causing error when rendering with "The Image" attribute has no file associated with it.
Print | Individual message | Show original | Report this message | Find messages by this author

There was some major file storage refactoring done before 1.0, which I'd
guess introduced a requirement that attempting to retrieve the url
associated with a file-type object requires a file to be associated with
that object.  A little experimenting in the shell shows that now where {{
m.file.url }} generates the exception you report in the case where m.file
has no file,

{% if m.file %}{{ m.file.url }}{% endif %}

does not.  I didn't work on the file storage refactor so I don't know if
this was an intentional difference, and I haven't checked if this was
explicitly documented as a backwards-incompatible change, but it seems
not-so-surprising that such a method would require a file to be set, and
easy enough to adjust to?

Karen


 
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