You can use the template language to test against what you think are constants,
the parser is actually testing 2 "literals".
The parser tests for 2 literals with names 'None' and 'False'.
When parser tries to resolve these in the context a VariableDoesNotExist
exception is thrown and both objects resolves to the python value None
and None == None.
>>> from django.template import Context, Template
>>> t = Template("{% if None == False %} not what you think {% endif %}")
>>> c = Context({"foo": foo() })
u' not what you think '
>>> c = Context({'None':None})
>>> t.render(c)
u' not what you think '
>>> c = Context({'None':None, 'False':False})
>>> t.render(c)
u''
Jason
On Apr 14, 2011, at 7:59 PM, carrier24sg wrote:
>
>
> Hi guys,
>
> {% if None == False %}
> abc
> {% endif %}
>
> Strangely my template displayed abc. Any explanation?
>
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