running template system standalone on django 1.7.1 results in AppRegistryNotReady error

[Oliver Willekens]

I'm running into a problem when I'm trying to use Django's template system in a standalone application. Previously, in Django 1.4, I didn't have this problem.

As described at configuring the template system in standalone mode, I first configure the settings of Django and then call one of the template loaders. However, I get an AppRegistryNotReady error:

In [1]: from django.conf import settings

In [2]: settings.configure(**{'TEMPLATE_DIRS': ('/home/oliver/projects/autodelayv3/templates',), 'TEMPLATE_LOADERS': ('django.template.loaders.filesystem.Loader',)})

In [3]: from django.template.loader import render_to_string

In [4]: render_to_string('webform.html', {'first_name': 'Oliver'})
---------------------------------------------------------------------------
AppRegistryNotReady                       Traceback (most recent call last)
<ipython-input-4-d2451b904f1a> in <module>()
----> 1 render_to_string('webform.html', {'first_name': 'Oliver'})

/home/oliver/.virtualenvs/base/local/lib/python2.7/site-packages/django/template/loader.pyc in render_to_string(template_name, dictionary, context_instance, dirs)
    168         t = select_template(template_name, dirs)
    169     else:
--> 170         t = get_template(template_name, dirs)
    171     if not context_instance:
    172         return t.render(Context(dictionary))

/home/oliver/.virtualenvs/base/local/lib/python2.7/site-packages/django/template/loader.pyc in get_template(template_name, dirs)
    142     handling template inheritance recursively.
    143     """
--> 144     template, origin = find_template(template_name, dirs)
    145     if not hasattr(template, 'render'):
    146         # template needs to be compiled

/home/oliver/.virtualenvs/base/local/lib/python2.7/site-packages/django/template/loader.pyc in find_template(name, dirs)
    130     for loader in template_source_loaders:
    131         try:
--> 132             source, display_name = loader(name, dirs)
    133             return (source, make_origin(display_name, loader, name, dirs))
    134         except TemplateDoesNotExist:

/home/oliver/.virtualenvs/base/local/lib/python2.7/site-packages/django/template/loader.pyc in __call__(self, template_name, template_dirs)
     42
     43     def __call__(self, template_name, template_dirs=None):
---> 44         return self.load_template(template_name, template_dirs)
     45
     46     def load_template(self, template_name, template_dirs=None):

/home/oliver/.virtualenvs/base/local/lib/python2.7/site-packages/django/template/loader.pyc in load_template(self, template_name, template_dirs)
     48         origin = make_origin(display_name, self.load_template_source, template_name, template_dirs)
     49         try:
---> 50             template = get_template_from_string(source, origin, template_name)
     51             return template, None
     52         except TemplateDoesNotExist:

/home/oliver/.virtualenvs/base/local/lib/python2.7/site-packages/django/template/loader.pyc in get_template_from_string(source, origin, name)
    154     handling template inheritance recursively.
    155     """
--> 156     return Template(source, origin, name)
    157
    158

/home/oliver/.virtualenvs/base/local/lib/python2.7/site-packages/django/template/base.pyc in __init__(self, template_string, origin, name)
    130         if settings.TEMPLATE_DEBUG and origin is None:
    131             origin = StringOrigin(template_string)
--> 132         self.nodelist = compile_string(template_string, origin)
    133         self.name = name
    134         self.origin = origin

/home/oliver/.virtualenvs/base/local/lib/python2.7/site-packages/django/template/base.pyc in compile_string(template_string, origin)
    160     lexer = lexer_class(template_string, origin)
    161     parser = parser_class(lexer.tokenize())
--> 162     return parser.parse()
    163
    164

/home/oliver/.virtualenvs/base/local/lib/python2.7/site-packages/django/template/base.pyc in parse(self, parse_until)
    288                     self.invalid_block_tag(token, command, parse_until)
    289                 try:
--> 290                     compiled_result = compile_func(self, token)
    291                 except TemplateSyntaxError as e:
    292                     if not self.compile_function_error(token, e):

/home/oliver/.virtualenvs/base/local/lib/python2.7/site-packages/django/template/defaulttags.pyc in load(parser, token)
   1113             # add the library to the parser
   1114             try:
-> 1115                 lib = get_library(taglib)
   1116                 parser.add_library(lib)
   1117             except InvalidTemplateLibrary as e:

/home/oliver/.virtualenvs/base/local/lib/python2.7/site-packages/django/template/base.pyc in get_library(library_name)
   1329     lib = libraries.get(library_name, None)
   1330     if not lib:
-> 1331         templatetags_modules = get_templatetags_modules()
   1332         tried_modules = []
   1333         for module in templatetags_modules:

/home/oliver/.virtualenvs/base/local/lib/python2.7/site-packages/django/template/base.pyc in get_templatetags_modules()
   1304         templatetags_modules_candidates = ['django.templatetags']
   1305         templatetags_modules_candidates += ['%s.templatetags' % app_config.name
-> 1306             for app_config in apps.get_app_configs()]
   1307         for templatetag_module in templatetags_modules_candidates:
   1308             try:

/home/oliver/.virtualenvs/base/local/lib/python2.7/site-packages/django/apps/registry.pyc in get_app_configs(self)
    135         Imports applications and returns an iterable of app configs.
    136         """
--> 137         self.check_apps_ready()
    138         return self.app_configs.values()
    139

/home/oliver/.virtualenvs/base/local/lib/python2.7/site-packages/django/apps/registry.pyc in check_apps_ready(self)
    122         """
    123         if not self.apps_ready:
--> 124             raise AppRegistryNotReady("Apps aren't loaded yet.")
    125
    126     def check_models_ready(self):

AppRegistryNotReady: Apps aren't loaded yet.

In [5]: import django; print(django.get_version())
1.7.1


Sorry for the huge traceback. I'm trying to figure out if anyone else can reproduce this problem (I already tested it on LinuxMintDebianEdition and Raspbian) or tell me what I'm doing wrong.
The "webform.html" is a regular file under "/home/oliver/projects/autodelayv3/templates", obviously.

[Oliver Willekens]

Found it. That template had {% load staticfiles %} in it, which cannot be used in this standalone context.

Op donderdag 8 januari 2015 02:32:00 UTC+1 schreef Oliver Willekens: