greetings,
i have created a template loader to grab templates from the database:
from django.template import TemplateDoesNotExist
try:
from myproject.editor.models import Layout
except:
Layout = None
def load_template_source(name, template_dirs=None):
"""
Loads templates from the database instead of the filesystem.
"""
try:
t = Layout.objects.get(name=name)
return (t.content, 'loader:%s' % name)
except:
raise TemplateDoesNotExist, name
pass
load_template_source.is_usable = Layout is not None
and then we have the view to grab the data from the database and put
it all together to make it work:
def paint(request, slug):
p = get_object_or_404(Page, slug=slug)
pp = PagePart.objects.get(page_id=p.id)
t = template.Template(pp.content)
pp.content = t.render(request)
lay = Layout.objects.get(pk=p.layout_id_id)
return render_to_response(lay.name, {'content': pp},
RequestContext(request))
this has worked flowlessly for us until i tried to use a custom
template tag to display information within one of the database
templates. i have narrowed the problem down to the loader or the
view, since i can use the custom template tag with a file system
template but it does not work with the database templates. here is
the tag:
from django import template
from myproject.editor.models import Project
register = template.Library()
class GetProject(template.Node):
def __init__(self, arg1, arg2):
self.varname = arg1
self.slug = arg2
def render(self, context):
project = Project.objects.get(slug=self.slug)
t = template.Template()
context[self.varname] = t.render(project)
return ''
class DoGetProject:
"""
{% get_project as project %}
"""
def __init__(self, tag_name):
self.tag_name = tag_name
def __call__(self, parser, token):
bits = token.contents.split()
if len(bits) != 4:
raise template.TemplateSyntaxError, "'%s' tag takes three
arguments" % bits[0]
if bits[1] != "as":
raise template.TemplateSyntaxError, "First argument to
'%s' tag must be 'as'" % bits[0]
return GetProject(bits[2], bits[3])
register.tag('get_project', DoGetProject('get_project'))
from the template level you call {% get project as fp projectslug %
where fp is the name of context variable that will be used at the
template level and "projectslug" is the slug of the project. thus you
can display {{ fp.name }} or {{ fp.description }} etc.
i suspect that the problem lies in the view, but i cannot seem to see
where i might have gone wrong with the code. i have made various
changes to it, like:
t = template.Template(project.description)
context[self.varname] = t.render(context)
but to no avail. any help would be greatly appreciated.
saludos,
steve
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