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Thread: extends isn't working
extends isn't working
country flaguser name
United States		 2007-10-22 09:57:57 
I'm very new to the whole Django framework, but have a  bit
of
experiance in Python. I'm doing some of the tutorial work
and
extending to my own project slowly. However, I'm having a
MAJOR
problem when using the TEMPLATE_DIRS. In the settings file I
have set
where all my template HTML files are to be. I, so far, have
two files:
index.html and index_title.html (which "extends
index.html").
index.html works without a hitch. However, I can't get any
of the
extended files to work with index. Here's a snippit:


index.html:
...
<head>
<meta http-equiv="Content-Type"
content="text/html;
charset=iso-8859-1" />
<title>{% block tag_title %}THIS IS TEMPORARY{%
endblock %}</title>
</head>
...

index_title.html:

{% extends "index.html" %}

{% block tag_title %}THIS IS NOT TEMPORARY{% endblock %}

I've tried various forms of this, but to no avail. I can zip
up the
project and forward it along to anyone who would be willing
to  help.
It doesn't seem like it would be a hard problem for someone
who knows
Django well.

randallprincegmail.com


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Re: extends isn't working
user name
 2007-10-22 10:19:06 

  


  

    What are the outwardly-visible signs of "I can't get any of the extended files to work with index";?  From what you've posted I don't know if you are seeing errors about templates files not being found or if you are just seeing unexpected output in your resulting HTML. ; You might also want to mention what template loaders you have specified, and give a snippet of you view code that is attempting to render the problem tempalte.



Karen



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    Re: extends isn't working
  


  

     country flaguser name
United States		
     2007-10-22 10:45:35
  


  

    
Sorry for the vagueness in my post.

The problem is that there are no errors. The output is just
unexpected. The text and code I put into the file which is
index's
extension doesn't show up. I put in a default value between
the
index.html block. Then I've tried to extend the block with
an
alternate text and actual code to draw info from the content
system I
have. In neither case does the alternate text or code show
up. Here is
the code in the views.py that renders the page I'm having
problems
with:

from django.http import HttpResponse
from django.template import Context, loader

def Index( request ):

  t = loader.get_template( 'index.html' )
  c = Context( { 'title': "EasyAutoSales.com Best Car
Site Ever", } )

I've tried to use "t = loader.select_template( [
'index.html',
'index_title.html', 'index_body.html' ] )" as well
without any luck.
Thanks for the quick reply!

Randall Prince

On Oct 22, 11:19 am, "Karen Tracey"
<kmtra...gmail.com> wrote:
> What are the outwardly-visible signs of "I can't
get any of the extended
> files to work with index"?  From what you've
posted I don't know if you are
> seeing errors about templates files not being found or
if you are just
> seeing unexpected output in your resulting HTML.  You
might also want to
> mention what template loaders you have specified, and
give a snippet of you
> view code that is attempting to render the problem
tempalte.
>
> Karen


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    Re: extends isn't working
  


  

     country flaguser name
United States		
     2007-10-22 10:50:08
  


  

    
I misesd the return line...

return HttpResponse( t.render( c ) )

On Oct 22, 11:45 am, DjangoFett <randallpri...gmail.com> wrote:
> Sorry for the vagueness in my post.
>
> The problem is that there are no errors. The output is
just
> unexpected. The text and code I put into the file which
is index's
> extension doesn't show up. I put in a default value
between the
> index.html block. Then I've tried to extend the block
with an
> alternate text and actual code to draw info from the
content system I
> have. In neither case does the alternate text or code
show up. Here is
> the code in the views.py that renders the page I'm
having problems
> with:
>
> from django.http import HttpResponse
> from django.template import Context, loader
>
> def Index( request ):
>
>   t = loader.get_template( 'index.html' )
>   c = Context( { 'title': "EasyAutoSales.com Best
Car Site Ever", } )
>
> I've tried to use "t = loader.select_template( [
'index.html',
> 'index_title.html', 'index_body.html' ] )" as well
without any luck.
> Thanks for the quick reply!
>
> Randall Prince
>
> On Oct 22, 11:19 am, "Karen Tracey"
<kmtra...gmail.com> wrote:
>
> > What are the outwardly-visible signs of "I
can't get any of the extended
> > files to work with index"?  From what you've
posted I don't know if you are
> > seeing errors about templates files not being
found or if you are just
> > seeing unexpected output in your resulting HTML. 
You might also want to
> > mention what template loaders you have specified,
and give a snippet of you
> > view code that is attempting to render the problem
tempalte.
>
> > Karen


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    Re: extends isn't working
  


  

     user name

     2007-10-22 10:54:05
  


  

    

  


  

    On 10/22/07, DjangoFett < randallprincegmail.com">randallprincegmail.com> wrote:

def Index( request ):

  t = loader.get_template( 'index.html' )

I think you want: 

t = loader.get_template( 'index_title.html' )

there.&nbsp; Your view code needs to specify the "extending" template you want to have rendered, not the base template being extended.&nbsp; 


Karen



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    Re: extends isn't working
  


  

     country flaguser name
United States		
     2007-10-22 11:10:07
  


  

    
How, then, can i extend multiple code sources off of my
index.html
file?

I'm looking at the Django Template language page (http://
www.djangoproject.com/documentation/templates/) and what
it's saying
(as well as my logic) isn't meshing with what you're saying.
Here's a
simple example I'm creating right now for educational
purposes:

index_title.html:

{% extends "index.html" %}
{% block tag_title %}THIS IS THE TITLE{% endblock %}

index.html:

<html>
<head>
<title>{% block block_title %}THIS IS NOT THE TITLE{%
endblock %}</
title>
</head>
<body>
{% block block_header %}THIS IS NOT THE HEADER{% endblock
%}<br />
<br />
{% block block_body %}THIS IS NOT THE BODY{% endblock
%}<br />
<br />
{% block block_footer %}THIS IS NOT THE FOOTER{% endblock
%}<br />
<br />
</body>
</html>

I'm going to load the "index_title.html" file? How
can I load the
proper files to extend the header, body and footer section
then? It
just seems like reverse logic to me.

On Oct 22, 11:54 am, "Karen Tracey"
<kmtra...gmail.com> wrote:
> On 10/22/07, DjangoFett <randallpri...gmail.com> wrote:
>
>
>
> > def Index( request ):
>
> >   t = loader.get_template( 'index.html' )
>
> I think you want:
>
> t = loader.get_template( 'index_title.html' )
>
> there.  Your view code needs to specify the
"extending" template you want to
> have rendered, not the base template being extended.
>
> Karen


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    Re: extends isn't working
  


  

     country flaguser name
United States		
     2007-10-22 11:37:16
  


  

    
I think I'm starting to see the point of extends now, as I
had been
assuming it was equivilant to the php include statements.
What I'm
assuming extends is for now is to always have
"base" files from which
to extend. You create particular layouts from which children
inherit
the parents overall template.

So, example:

You'll write up index_viewlist.html which only has the
individual
special "blocks" of code which are then used in
the index.html
template (index_viewlist.html->index.html). Then, you'll
have another
file called index_viewitem.html which will use the same
block names to
form new code using the index.html template
(index_viewitem.html-
>index.html).

I was hoping for more of a tree structure of
extensions...but I see
how that would breakdown when you want to use various views
to inheret
from a single index file using their own methods to put data
into that
index. Long story short, it's very much akin to templated
classes.

Randall Prince

On Oct 22, 12:10 pm, DjangoFett <randallpri...gmail.com> wrote:
> How, then, can i extend multiple code sources off of my
index.html
> file?
>
> I'm looking at the Django Template language page (http://www.djangoproject.com/documentation/templates/)
and what it's saying
> (as well as my logic) isn't meshing with what you're
saying. Here's a
> simple example I'm creating right now for educational
purposes:
>
> index_title.html:
>
> {% extends "index.html" %}
> {% block tag_title %}THIS IS THE TITLE{% endblock %}
>
> index.html:
>
> <html>
> <head>
> <title>{% block block_title %}THIS IS NOT THE
TITLE{% endblock %}</
> title>
> </head>
> <body>
> {% block block_header %}THIS IS NOT THE HEADER{%
endblock %}<br />
> <br />
> {% block block_body %}THIS IS NOT THE BODY{% endblock
%}<br />
> <br />
> {% block block_footer %}THIS IS NOT THE FOOTER{%
endblock %}<br />
> <br />
> </body>
> </html>
>
> I'm going to load the "index_title.html"
file? How can I load the
> proper files to extend the header, body and footer
section then? It
> just seems like reverse logic to me.
>
> On Oct 22, 11:54 am, "Karen Tracey"
<kmtra...gmail.com> wrote:
>
> > On 10/22/07, DjangoFett <randallpri...gmail.com> wrote:
>
> > > def Index( request ):
>
> > >   t = loader.get_template( 'index.html' )
>
> > I think you want:
>
> > t = loader.get_template( 'index_title.html' )
>
> > there.  Your view code needs to specify the
"extending" template you want to
> > have rendered, not the base template being
extended.
>
> > Karen


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    Re: extends isn't working
  


  

     user name

     2007-10-22 11:54:59
  


  

    

  


  

    On 10/22/07, DjangoFett < randallprincegmail.com">randallprincegmail.com> wrote:

I was hoping for more of a tree structure of extensions...

Note that extends can be chained.&nbsp; Using your example:

You start with index.html that defines all the blocks you want to customize, as you have it now.




Then, in index_title, you extend index and customize the tag_title block.



Then, perhaps in index_body, you extend index_title (which has already
customized tag_title), and customize block_header and block_body.



Then, perhaps in index_footer, you extend index_body and customize block_footer.  



At that point all your blocks have been customized and your view
specifies index_footer as the template to load, which in turn points to
index_body, which in turn refers to index_title, which finally gets
back to the base index template.



Now this particular sequence of extensions for customization may not make much logical sense, but the point is you do not have to override/customize everything in the base template at once. ; You can chain your extensions.  And by creating different extenders for the same base, create a tree of extensions.  Not sure if that's the kind of tree you were looking for, though.


Hoping this clarifies more than it muddies,
Karen


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    Re: extends isn't working
  


  

     country flaguser name
United States		
     2007-10-22 12:06:27
  


  

    
The more I "fiddle" with these templates, the more
I'm understanding
them. It was the initial learning curve that just had me
confused b/c
it wasn't what I was looking for. I think I understand all
you're
speaking of now, though. Thanks for your great help Karen!
I'll be
seeing you on here a lot with my new found love of Django!

Randall

On Oct 22, 12:54 pm, "Karen Tracey"
<kmtra...gmail.com> wrote:
> On 10/22/07, DjangoFett <randallpri...gmail.com> wrote:
>
>
>
> > I was hoping for more of a tree structure of
extensions...
>
> Note that extends can be chained.  Using your example:
>
> You start with index.html that defines all the blocks
you want to customize,
> as you have it now.
>
> Then, in index_title, you extend index and customize
the tag_title block.
>
> Then, perhaps in index_body, you extend index_title
(which has already
> customized tag_title), and customize block_header and
block_body.
>
> Then, perhaps in index_footer, you extend index_body
and customize
> block_footer.
>
> At that point all your blocks have been customized and
your view specifies
> index_footer as the template to load, which in turn
points to index_body,
> which in turn refers to index_title, which finally gets
back to the base
> index template.
>
> Now this particular sequence of extensions for
customization may not make
> much logical sense, but the point is you do not have to
override/customize
> everything in the base template at once.  You can chain
your extensions.
> And by creating different extenders for the same base,
create a tree of
> extensions.  Not sure if that's the kind of tree you
were looking for,
> though.
>
> Hoping this clarifies more than it muddies,
> Karen


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    Re: extends isn't working
  


  

     user name

     2007-10-22 14:20:39
  


  

    
Randall,

On 10/22/07, DjangoFett <randallprincegmail.com> wrote:
>
> The more I "fiddle" with these templates, the
more I'm understanding
> them. It was the initial learning curve that just had
me confused b/c
> it wasn't what I was looking for...

There is a description of how template inheritance works in
the no-tutorial
documentation:

  http://www.djangoproject.com/documenta
tion/templates/#template-inheritance

-- 
 Ramiro Morales

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