AttributeError: 'NoneType' object a has no attribute 'b'
this would be nicerso we know variable is causing the error
in current cheetah and git cheetah it is pretty hard to find out which
variable is problematic
On Thu, May 7, 2009 at 2:06 AM, Jean-Baptiste Quenot <[email protected]>wrote:
> Hi there,
>
> Look at the following code snippet:
>
>
> from Cheetah.Template import Template
>
> t = Template.compile(source="""
> #set $a = None
> #if $a.b
> Impossible
> #end if
> """)
>
> print t()
>
>
> When executing this script, an exception is thrown:
>
>
> Traceback (most recent call last):
> File "test_cheetah_set.py", line 11, in <module>
> print t()
> File "/var/lib/python-support/python2.5/Cheetah/Template.py", line
> 996, in __str__
> return getattr(self, mainMethName)()
> File "DynamicallyCompiledCheetahTemplate.py", line 84, in respond
> NameMapper.NotFound: cannot find 'b' while searching for 'a.b'
>
>
> The error messsage is misleading for template writers. Of course the
> error is not that Cheetah cannot find 'b', but rather that 'a' is
> None. The following error message would be more useful:
>
> AttributeError: 'NoneType' object has no attribute 'b'
>
> Any idea how to fix this? I guess it involves changing the
> NameMapper, that may also imply some C coding.
>
> Cheers,
> --
> Jean-Baptiste Quenot
> http://jbq.caraldi.com/
>
>
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