I understand that.
You can define at the top of layout and do
{{def block(name):
try:
name()
return False
except:
return True
pass
return}}
and do
#layout.html
<html><head>
<title>{{if block(title):}}index{{pass}} - mysite.com</title>
</head><body>
<div id="left_colunmn"># some navigation links here</div>
<div id="content">{{include}}</div>
<div id="right_column">
{{if block(right_col):}}
<h3>Latest Comments</h3>
<ul>....</ul>
<h3>Latest RSS Feeds</h3>
<ul>....</ul>
{{pass}}
</div>
</body></html>
#default/search.html
{{def right_col():}}
... search options
{{=search_form}}
<h4>Search Tips</h4>
<ul><li>Try using keywords</li></ul>
{{return}}
{{extend 'layout.html'}}
{{=BEAUTIFY(results)}}
On Nov 23, 12:08 am, Thadeus Burgess <thade...@thadeusb.com> wrote:
> I think you're trying to use blocks incorrectly. Blocks are defined in a
> base template that is to be extended. When the extending template declares a
> block that exists in the parent template, it will replace everything in
> between the parent block, like inheritance and overriding. However the
> parent template can display a default value for the block, in case it does
> not get overridden.
>
> A case example, say on every page I want to display the latest posts,
> comments, and updated RSS feeds. However on my search page, I want to
> replace this column with a search form instead, so I display a lengthy form
> so you can select between categories, tags, search phrase, etc.
>
> I do not believe this is possible in pure template code in web2py, you have
> to do something from your controller such as response.right_column =
> "latest_stuff.html", and then if you want to set it to something else you
> have to set it from your specific action, def search():
> response.right_column = "default/search_sidebar.html". I don't like this
> because it starts to blend the line between a Controller, and a View.
>
> With blocks this is how it would be implemented, all from within the views.
>
> #layout.html
>
> <html><head>
>
> <title>{{block title}}index{{endblock}} - mysite.com</title>
>
> </head><body>
>
> <div id="left_colunmn"># some navigation links here</div>
>
> <div id="content">{{include}}</div>
>
> <div id="right_column">
> {{block right_col}}
>
> <h3>Latest Comments</h3>
>
> <ul>....</ul>
>
> <h3>Latest RSS Feeds</h3>
>
> <ul>....</ul>
>
> {{endblock}}
> </div>
>
> #default/search.html
>
> {{block right_col}}
>
> ... search options
>
> {{=search_form}}
>
> <h4>Search Tips</h4>
> <ul><li>Try using keywords</li></ul>
>
> {{endblock}}
>
> {{=BEAUTIFY(results)}}
>
> </body></html>
>
> -Thadeus
>
> On Sun, Nov 22, 2009 at 10:03 PM, mdipierro <mdipie...@cs.depaul.edu> wrote:
>
> > Here is my problem with blocks:
>
> > #extended
> > {{block a}}hello{{endblock}} world {{block b}}hello{{endblock}}
>
> > #extending
> > {{block a}}HELLO{{endblock}} WORLD {{block b}}HELLO{{endblock}}
>
> > where does WORLD go? It gets lost. Blocks are convenient and not well
> > defined.
>
> > I believe {{def a():}}HELLO{{return}}, the current web2py way, is more
> > Pythonic and it is better defined.
>
> > Massimo
>
> > On Nov 22, 9:46 pm, Thadeus Burgess <thade...@thadeusb.com> wrote:
> > > Would blocks be too much to ask for?
>
> > > -Thadeus
>
> > > On Sun, Nov 22, 2009 at 9:15 AM, mdipierro <mdipie...@cs.depaul.edu>
> > wrote:
>
> > > > Perhaps you are talking about something equivalent to Django blocks?
> > > > We do not have that.
> > > > We have other ways to do a similar thing. There are two basic things
> > > > you can do:
>
> > > > 1) Extending
> > > > #extedened.html
> > > > <html><body>{{include}}</body></html>
>
> > > > #extending.html
> > > > {{extends 'extended.html'}}<h1>Hello<h1>
>
> > > > 2) Including
> > > > #including.html
> > > > <html><body>{{include 'body.html'}}</body></html>
>
> > > > #body.html
> > > > <h1>Hello<h1>
>
> > > > And you can mix and match.
> > > > You can also pass functions to the extended function
>
> > > > Extending
> > > > #extedened.html
> > > > <html><body><h1>{{header()}}</h1>{{include}}<h1>{{footer()}}</h1></
> > > > body></html>
>
> > > > #extending.html
> > > > {{def header():}}This is the header{{return}}
> > > > {{def footer():}}This is the footer{{return}}
> > > > {{extends 'extended.html'}}<h1>Hello<h1>
>
> > > > and you can do these things in a try ... except to have a default:
>
> > > > <html><body><h1>{{try: header()}}{{except:}}default{{pass}}</h1>
> > > > {{include}}<h1>{{footer()}}</h1></body></html>
>
> > > > Massimo
>
> > > > On Nov 22, 7:18 am, jensmun <j...@acamedia.org> wrote:
> > > > > Hi,
>
> > > > > Typical case of embarrassing situation. I don't know anything about
> > > > > programming and wanted to try this out. Unfortunately I can't even
> > get
> > > > > my head around extensions of views. And I can't seem to find a
> > > > > description of something this basic.
>
> > > > > I've tried stripped the example app in web2py from everything but a
> > > > > default controller, two views and the db-model. But I can't get the
> > > > > extension of views to work. And the Welcome-application is far too
> > > > > complicated for somebody like me to understand.
>
> > > > > I would be grateful for a pointer to some place which explains view
> > > > > and their extensions. If for example there are two places where I use
> > > > > <h1> how does the extension view know which of these two replace with
> > > > > the <h1> in the extension.
>
> > > > > Stupid question I know - but I've been trying to create a model and
> > > > > extension view which changes top "Welcome customize me" and not been
> > > > > succeeding.
>
> > > > > And Massimo's manual assumes a lot of this knowledge already I feel -
> > > > > since the examples moves quickly past how extensions change the
> > parent-
> > > > > node.
>
> > > > > Grateful for any direction,
>
> > > > > Jens
>
>
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