templatetags/include_string.py

   1 from django import template
   2 from django.conf import settings
   3
   4
   5 register = template.Library()
   6
   7
   8 class IncludeStringNode(template.Node):
   9         """The passed variable is expected to be a string of template code to be rendered with
  10         the current context."""
  11         def __init__(self, string):
  12                 self.string = string
  13
  14         def render(self, context):
  15                 try:
  16                         t = template.Template(self.string.resolve(context))
  17                         return t.render(context)
  18                 except template.TemplateSyntaxError:
  19                         if settings.TEMPLATE_DEBUG:
  20                                 raise
  21                         return settings.TEMPLATE_STRING_IF_INVALID
  22                 except:
  23                         return settings.TEMPLATE_STRING_IF_INVALID
  24
  25
  26 def do_include_string(parser, token):
  27         """
  28         Include a flat string by interpreting it as a template.
  29         {% include_string <template_code> %}
  30         """
  31         bits = token.split_contents()
  32         if len(bits) != 2:
  33                 raise TemplateSyntaxError("%r tag takes one argument: the template string to be included" % bits[0])
  34         string = parser.compile_filter(bits[1])
  35         return IncludeStringNode(string)
  36
  37
  38 register.tag('include_string', do_include_string)