Okay. Seems logic. But Im not sure what I should do.
So what would you do?
Thanks
On 26 Aug., 12:09, Daniel Roseman <dan...@roseman.org.uk> wrote:
> On Aug 26, 12:44 am, MIL <needb...@gmail.com> wrote:
>
>
>
> > Hi guys :o)
>
> > Im attempting to create a template tag but I get a strange response.
> > it returns "None" where I put the {% if blog_detail %} tag
>
> > Here is my template tag
>
> > class BlogNode(Node):
> > def __init__(self, user, varname):
> > self.user, self.varname = user, varname
>
> > def render(self, context):
> > try:
> > context[self.varname] =
> > Blog.objects.get(user=self.user)
> > except ObjectDoesNotExist:
> > context[self.varname] = False
>
> > @register.tag
> > def get_blog(parser, token):
> > # {% get_blog for user_object as object_detail %}
> > # {% if blog_detail %} etc...
> > bits = token.contents.split()
> > if len(bits) != 5:
> > raise TemplateSyntaxError, "get_blog tag takes exactly five
> > arguments"
> > if bits[1] != 'for':
> > raise TemplateSyntaxError, "second argument to get_blog tag
> > must be
> > 'for'"
> > if bits[3] != 'as':
> > raise TemplateSyntaxError, "third argument to get_blog tag
> > must be
> > 'as'"
> > return BlogNode(bits[2], bits[4])
>
> > Why does it response with a "None" message?
>
> > Thanks :o)
>
> Your render() method should return something, even if it's a blank
> string. The default value returned by a function in Python is None, so
> the template is simply showing this (converted into a string, ie
> 'None').
> --
> DR.
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