1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
|
Templates
=========
A *template* is a file on disk which can be used to render data
provided by a *view* in a form that is meaningful for a particular
*context*.
Default Templating With z3c.pt Page Templates
------------------------------------------------
Like Zope, ``repoze.bfg`` uses Zope Page Templates (ZPT) as its default
templating language. However, ``repoze.bfg`` uses a different
implementation of the ZPT specification: the `z3c.pt
<http://pypi.python.org/pypi/z3c.pt>`_ templating engine. This
templating engine complies with the `Zope Page Template
<http://wiki.zope.org/ZPT/FrontPage>`_ template specification. While
``z3c.pt`` doesn't implement the METAL specification (feature or
drawback, depending on your viewpoint,) it is significantly faster. And
faster, of course, is the zen of ``repoze.bfg``.
Given a template named ``foo.html`` in a directory in your application
named "templates", you can render the template in a view via::
from repoze.bfg.template import render_template_to_response
return render_template_to_response('templates/foo.html', foo=1, bar=2)
You can also wire up page templates via ZCML:
.. sourcecode:: xml
<bfg:view
for=".models.IMapping"
view=".views.contents_view"
name="contents.html"
/>
Both approaches load the template and keep it in memory between
requests. This means that modifications to the ZPT require a restart
before you can see the changes.
Templating with XSLT
------------------------
``repoze.bfg`` also supports XSLT as an optional templating language.
Like ZPT, an XSLT template is loaded once and re-used between requests.
Given a template ``foo.xsl`` in the templates directory, you can render
an XSLT as follows::
from repoze.bfg.template import render_transform_to_response
from lxml import etree
node = etree.Element("root")
return render_transform_to_response('templates/foo.xsl', node)
As shown, the second argument to ``render_transform_to_response`` is
the element (and children) that you want as the top of the data for
the XSLT.
You can also pass XSLT parameters in as keyword arguments::
from repoze.bfg.template import render_transform_to_response
from lxml import etree
node = etree.Element("root")
value1 = "'app1'"
return render_transform_to_response('templates/foo.xsl', node, param1=value1)
This would then assign 'app1' as the value of an ``<xsl:param
name="param1"/>`` parameter in the XSLT template.
|
