...but you can already see all that from Massimo's nice, concise
examples,
and I should not be sitting reading posts on a sunny Sunday
afternoon! I'm sure not to say much of anything smart while looking
out the window ;-)
On Oct 12, 5:28 pm, yarko <[EMAIL PROTECTED]> wrote:
> understood....
>
> I was arguing that having something like {{exterior_finish(car) }}
> is not any different than {{ car | pime | paint | bake | add_trim }}
> that is - where the code sits...
>
> But in the cases you meant, yes - {{my()}} <static stuff>
> {{is_nicer_all_here()}}
>
> Thanks.
>
> As for multilne code: write "normal" code, encapsulted in {{ }};
> for output, leave left side "blank" (dumps on template, so:
> {{=my_result(on_this)}}
> For starters, everywhere you would have "unindent" situation in
> python, in template put {{ pass }};
> Actually you only need where it would be ambiguous, but for starters,
> that's a good rule - after you have code working, try removing the
> "pass"s you think are not necessary.... won't take long to see where
> you don't need them.
>
> For HTML helpers, they take all (?) the (optional) parameters that the
> W3C defines for the HTML equivalents.
>
> For examples, get the appliances (e.g. KPAX, others on the "Repository
> of free apps" link at web2py.com)
>
> On Oct 12, 5:13 pm, pigmej <[EMAIL PROTECTED]> wrote:
>
> > Now I see that I can make with web2py templates almost everything :).
>
> > Massimo, I really think, You should add this recipes to howto :)
>
> > @yarko:
>
> > sometimes there is no staight way to modify something in controller.
> > But ok, I modify it, and then i loop them again in template -> so
> > there are two loops. One more than using filter in template ;)
>
> > How to write multiline python code in filter ?? I cannot find real
> > example for this momemt...
>
> > but maybe, replacing something in part of list/dictionary etc.
>
> > On 12 Paź, 23:49, yarko <[EMAIL PROTECTED]> wrote:
>
> > > This looks like only a stylistic discussion to me....
>
> > > Django has this too, and Jinja you say have a "shell like" syntax of
> > > "pipes" --- that is output of one operation feeds input of another.
> > > n
> > > {{ car | prime | paint }} is equivalent to {{ paint(prime(car)) }},
> > > or for that matter {{ car.paint().prime() }}
>
> > > Functionally, I don't see anything you can do one way over the
> > > other..... it's a matter of style, convenience, what your used to,
> > > what you like reading.
>
> > > I like the "pipeline" syntax, but I learned on UNIX in the mid-70's,
> > > so it's almost "genetic" for me to just read that. The downside to
> > > that is that you can get lulled into putting too much processing in
> > > the template ... precisely because it's so readable.
>
> > > Having a utility function in a module, or a application local function
> > > in a controller is - as you say - doable.
>
> > > But the more worthwhile thing is thinking about what you want to do,
> > > and putting it in a good place. And making the template as concise
> > > as makes sense.
>
> > > re: one loop more on contoller side - not sure I follow you on that.
> > > Wherever you write the filters, they are running (in these examples)
> > > on the server, applied similarly, and when they are done, the
> > > resulting output is rendered into something sent out over the
> > > network... You could look at how many "calls" you have when snippets
> > > are in the template vs. explicitly defined utility functions, but I
> > > think this is more about the patterns of code maintenance (and
> > > reading) than anything...
>
> > > I think it probably would not be hard to apply a transform to
> > > templates so that you can pile up calls with the "pipeline" flavor of
> > > showing transfer of control. But, other than end user reading - and
> > > what it might encourage about development steps - I don't think it
> > > materially changes anything.
>
> > > Am I missing something?
>
> > > Kind regards,
> > > Yarko
>
> > > On Oct 12, 4:30 pm, pigmej <[EMAIL PROTECTED]> wrote
>
> > > > massimo,
>
> > > > filters... ok but what if I need to make more operations with strings
> > > > etc, python operations, imports, parsing something ?
> > > > More lines of code.
>
> > > > For example I need to operate on dictionaries ( defining new, parsing
> > > > etc )
>
> > > > Theoretically, I can apply filters on controller side... but then
> > > > there is one ( or more ) loop more.
>
> > > > On 12 Paź, 23:01, mdipierro <[EMAIL PROTECTED]> wrote:
>
> > > > > You can do both:
>
> > > > > 1) Example of passing variables to parent.
> > > > > Here is layout.html
>
> > > > > <html><body><h1>{{=title}}</h1><p>{{include}}</p></body></html>
>
> > > > > and here is an example of index.html
>
> > > > > {{title='something'}}
> > > > > {{extend 'layout.html'}}
> > > > > Hello World
>
> > > > > Also are variables returned by the action and defined in models are
> > > > > also passed to the parent.
>
> > > > > 2) Example of a filter.
> > > > > You cannot filter HTML (because it does not make sense since you write
> > > > > it) but you can filter TEXT (coming from a variable for example) and
> > > > > the output of helpers. For example the following filter replaces
> > > > > newlines with <br />, sanitize everything else and wraps everything in
> > > > > a <p>.
>
> > > > > {{def myfilter(s):}}
> > > > > <p>{{=XML(str(s).replace('\n','<br />),sanitize=False)}}</p>
> > > > > {{return}}
>
> > > > > {{=myfilter("""Any<span>html code that
> > > > > you</span> like.""")
> > > > > {{=myfilter(H1(SPAN('Hello\nWorld')))}}
>
> > > > > Massimo
>
> > > > > On Oct 12, 3:42 pm, pigmej <[EMAIL PROTECTED]> wrote:
>
> > > > > > thanks for reply.
>
> > > > > > Python is templating engine - thats really good.
>
> > > > > > But I can only include file in one place and there is no way to
> > > > > > change
> > > > > > anything in parrent file. That's a minus, and the minor problem for
> > > > > > mine.
>
> > > > > > The same thing with filters/macros. I need to use the same macro/
> > > > > > filter in many files. I cannot find this "option" in web2py
> > > > > > templates...
>
> > > > > > On 12 Paź, 22:11, yarko <[EMAIL PROTECTED]> wrote:
>
> > > > > > > Also - if you want to use Genshi Templates (or try to do something
> > > > > > > similar for Jinja2), see the Genshi4web2py.py file and
> > > > > > > instructions
> > > > > > > here:
>
> > > > > > >http://mdp.cti.depaul.edu/AlterEgo/default/show/162
>
> > > > > > > On Oct 12, 2:59 pm, yarko <[EMAIL PROTECTED]> wrote:
>
> > > > > > > > There have been several discussions on this list on the topic -
> > > > > > > > for
> > > > > > > > example, look
> > > > > > > > throughhttp://groups.google.com/group/web2py/browse_thread/thread/1ef4eea826...
>
> > > > > > > > I think a raesonable summary is:
>
> > > > > > > > - web2py's templating, being very close to just being Python,
> > > > > > > > is
> > > > > > > > likely to continue to be default for some time;
> > > > > > > > - some people have written tools to convert skins for other
> > > > > > > > templates
> > > > > > > > to convert to web2py, so if it's available graphic designs you
> > > > > > > > want,
> > > > > > > > that's one way to go
> > > > > > > > - there has been talk about still allowing an interface for
> > > > > > > > other
> > > > > > > > engines.
>
> > > > > > > > I think interest (beyond one of discussion) has not been strong
> > > > > > > > enough
> > > > > > > > for someone to identify all the core web2py things that would
> > > > > > > > have to
> > > > > > > > be moved into a module, and rewritten for another template
> > > > > > > > engine.
> > > > > > > > This has spurned talk and work about modules for web2py, T2
> > > > > > > > being one
> > > > > > > > example. It has not yet spurned a design analysis of where
> > > > > > > > all the
> > > > > > > > boundaries are, and what it would take to implement that.
>
> > > > > > > > As for documentation, there's Chapter 5 of the web2py book...
> > > > > > > > but
> > > > > > > > basically, the template language is python, the helper
> > > > > > > > functions are
> > > > > > > > named after HTML, so you can discover them and use them as you
> > > > > > > > would
> > > > > > > > expect (<h2>This Heading</h2> ==> H2('This Heading') ) with all
> > > > > > > > the
> > > > > > > > named paramteres that w3c defines to h2 (for example) mirrored
> > > > > > > > in
> > > > > > > > H2(). There is a genshi translator (search these forums) and
> > > > > > > > there
> > > > > > > > is also Massimo's quick demonstraton of a layout builder - see
> > > > > > > > the
> > > > > > > > link onhttp://www.web2py.com. The builder has a link on it to
> > > > > > > > download the result of your layout experimentation.
>
> > > > > > > > Those are probably good starting places.
>
> > > > > > > > Hope this was helpful.
>
> > > > > > > > Regards,
> > > > > > > > Yarko
>
> > > > > > > > On Oct 12, 2:27 pm, pigmej <[EMAIL PROTECTED]> wrote:
>
> > > > > > > > > Is there any way to change default template engine in web2py?
>
> > > > > > > > > I would like to change it to something better with more
> > > > > > > > > features like
> > > > > > > > > Jinja2
>
> > > > > > > > > Or maybe there is a lot of undocumented things in default
> > > > > > > > > template
> > > > > > > > > engine ?
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