Django TemplateSyntaxError: Invalid filter: truncatechars
| July 24, 2013 | Posted by forumadmin under TechQns |
Comments off
|
Getting TemplateSyntaxError: Invalid filter: 'truncatechars' in app engine. I’m using latest django library. As per “Third-party Libraries in Python 2.7 on appengine” django latest version is 1.4 and truncatechars is included in the same version (django doc).
index.py
import webapp2
import os
from google.appengine.ext.webapp import template
class MainHandler(webapp2.RequestHandler):
def get(self):
title = " Python, an interactive, object-oriented, extensible programming language."
template_values = {
'title': title,
}
path = os.path.join(os.path.dirname(__file__), 'index.html')
self.response.out.write(template.render(path, template_values))
index.html
<html>
<body>
{{title|truncatechars:9}} // Error returns
{{title|slice:"9"}}{% if title|length > 9 %}...{% endif %}
</body>
</html>
In app.yaml
libraries:
- name: django
version: latest
I have tried with library version: "1.4" and have the same issue.
Error:
File "/home/user/google_appengine/lib/webapp2-2.5.2/webapp2.py", line 1535, in __call__
rv = self.handle_exception(request, response, e)
File "/home/user/google_appengine/lib/webapp2-2.5.2/webapp2.py", line 1595, in handle_exception
return handler(request, response, e)
File "/home/user/dimensionfinder/urls.py", line 43, in handle_500
response.write(template.render(path, template_values))
File "/home/user/google_appengine/google/appengine/ext/webapp/template.py", line 89, in render
t = _load_internal_django(template_path, debug)
File "/home/user/google_appengine/google/appengine/ext/webapp/template.py", line 163, in _load_internal_django
template = django.template.loader.get_template(file_name)
File "/home/user/google_appengine/google/appengine/_internal/django/template/loader.py", line 160, in get_template
template = get_template_from_string(template, origin, template_name)
File "/home/user/google_appengine/google/appengine/_internal/django/template/loader.py", line 168, in get_template_from_string
return Template(source, origin, name)
File "/home/user/google_appengine/google/appengine/_internal/django/template/__init__.py", line 158, in __init__
self.nodelist = compile_string(template_string, origin)
File "/home/user/google_appengine/google/appengine/_internal/django/template/__init__.py", line 186, in compile_string
return parser.parse()
File "/home/user/google_appengine/google/appengine/_internal/django/template/__init__.py", line 281, in parse
compiled_result = compile_func(self, token)
File "/home/user/google_appengine/google/appengine/_internal/django/template/defaulttags.py", line 693, in do_for
nodelist_loop = parser.parse(('empty', 'endfor',))
File "/home/user/google_appengine/google/appengine/_internal/django/template/__init__.py", line 262, in parse
filter_expression = self.compile_filter(token.contents)
File "/home/user/google_appengine/google/appengine/_internal/django/template/__init__.py", line 356, in compile_filter
return FilterExpression(token, self)
File "/home/user/google_appengine/google/appengine/_internal/django/template/__init__.py", line 538, in __init__
filter_func = parser.find_filter(filter_name)
File "/home/user/google_appengine/google/appengine/_internal/django/template/__init__.py", line 362, in find_filter
raise TemplateSyntaxError("Invalid filter: '%s'" % filter_name)
TemplateSyntaxError: Invalid filter: 'truncatechars'
 |
Asked By – Nijin Narayanan | Read Answers |
More Related Questions
