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POMysterious error in Python Urlobject called from Django Rest Framework
 

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  1. POMysterious error in Python Urlobject called from Django Rest Framework
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    <p>I am using the <a href="http://django-rest-framework.org/" rel="nofollow" title="Django Rest Framework">Django Rest Framework</a> to build an api, and have an implementation on my development machine. I wanted to quickly deploy it today and it is proving far more error prone than I expected. I have re-installed dependancies, re-installed Django, spent hours hunting down bugs, but this latest one has defeated me and Google.</p> <p>On the development machine, when I call one of the views from the framework I get the correct response (minus the static files but I'll deal with that later.) On the deployment machine however, I get this error:</p> <pre><code>'SplitResult' object has no attribute '_replace' </code></pre> <p>The traceback goes through a template tag in the rest framework, but the error seems to be thrown in urlobject in this method:</p> <pre><code>def __replace(self, **replace): """Replace a field in the ``urlparse.SplitResult`` for this URL.""" return type(self)(urlparse.urlunsplit( urlparse.urlsplit(self)._replace(**replace))) </code></pre> <p>I cannot reproduce this on my development machine, and I cannot find any references to this error anywhere. Just in case I have tried it on the deployment server with Django 1.2, 1.3, and 1.4, but the error seems to be unrelated to Django itself.</p> <p>Here is the full traceback:</p> <pre><code>Django Version: 1.3.1 Python Version: 2.5.2 Installed Applications: ['django.contrib.auth', 'django.contrib.contenttypes', 'django.contrib.sessions', 'django.contrib.sites', 'django.contrib.messages', 'staticfiles', 'django.contrib.admin', 'django.contrib.admindocs', 'char', 'djangorestframework'] Installed Middleware: ('django.middleware.common.CommonMiddleware', 'django.contrib.sessions.middleware.SessionMiddleware', 'django.middleware.csrf.CsrfViewMiddleware', 'django.contrib.auth.middleware.AuthenticationMiddleware', 'django.contrib.messages.middleware.MessageMiddleware') Traceback: File "/usr/lib/python2.5/site-packages/django/core/handlers/base.py" in get_response 111. response = callback(request, *callback_args, **callback_kwargs) File "/usr/lib/python2.5/site-packages/django/views/generic/base.py" in view 47. return self.dispatch(request, *args, **kwargs) File "/usr/lib/python2.5/site-packages/django/views/decorators/csrf.py" in wrapped_view 39. resp = view_func(*args, **kwargs) File "/usr/lib/python2.5/site-packages/django/views/decorators/csrf.py" in wrapped_view 52. return view_func(*args, **kwargs) File "/home/wfrp/wfrp-django/DjangoWfrp/external apps/django-rest-framework/djangorestframework/views.py" in dispatch 243. return self.final(request, response, *args, **kwargs) File "/home/wfrp/wfrp-django/DjangoWfrp/external apps/django-rest-framework/djangorestframework/views.py" in final 196. return self.render(response) File "/home/wfrp/wfrp-django/DjangoWfrp/external apps/django-rest-framework/djangorestframework/mixins.py" in render 251. content = renderer.render(response.cleaned_content, media_type) File "/home/wfrp/wfrp-django/DjangoWfrp/external apps/django-rest-framework/djangorestframework/renderers.py" in render 351. ret = template.render(context) File "/usr/lib/python2.5/site-packages/django/template/base.py" in render 123. return self._render(context) File "/usr/lib/python2.5/site-packages/django/template/base.py" in _render 117. return self.nodelist.render(context) File "/usr/lib/python2.5/site-packages/django/template/base.py" in render 744. bits.append(self.render_node(node, context)) File "/usr/lib/python2.5/site-packages/django/template/base.py" in render_node 757. return node.render(context) File "/usr/lib/python2.5/site-packages/django/template/loader_tags.py" in render 127. return compiled_parent._render(context) File "/usr/lib/python2.5/site-packages/django/template/base.py" in _render 117. return self.nodelist.render(context) File "/usr/lib/python2.5/site-packages/django/template/base.py" in render 744. bits.append(self.render_node(node, context)) File "/usr/lib/python2.5/site-packages/django/template/base.py" in render_node 757. return node.render(context) File "/usr/lib/python2.5/site-packages/django/template/defaulttags.py" in render 311. return self.nodelist_true.render(context) File "/usr/lib/python2.5/site-packages/django/template/base.py" in render 744. bits.append(self.render_node(node, context)) File "/usr/lib/python2.5/site-packages/django/template/base.py" in render_node 757. return node.render(context) File "/usr/lib/python2.5/site-packages/django/template/defaulttags.py" in render 227. nodelist.append(node.render(context)) File "/usr/lib/python2.5/site-packages/django/template/defaulttags.py" in render 500. output = self.nodelist.render(context) File "/usr/lib/python2.5/site-packages/django/template/base.py" in render 744. bits.append(self.render_node(node, context)) File "/usr/lib/python2.5/site-packages/django/template/base.py" in render_node 757. return node.render(context) File "/usr/lib/python2.5/site-packages/django/template/base.py" in render 792. output = self.filter_expression.resolve(context) File "/usr/lib/python2.5/site-packages/django/template/base.py" in resolve 536. new_obj = func(obj, *arg_vals) File "/home/wfrp/wfrp-django/DjangoWfrp/external apps/django-rest-framework/djangorestframework/templatetags/add_query_param.py" in add_query_param 7. return unicode(URLObject(url).with_query(param)) File "/home/wfrp/wfrp-django/DjangoWfrp/external apps/urlobject/lib/urlobject/urlobject.py" in with_query 117. return self.__replace(query=query) File "/home/wfrp/wfrp-django/DjangoWfrp/external apps/urlobject/lib/urlobject/urlobject.py" in __replace 181. urlparse.urlsplit(self)._replace(**replace))) Exception Type: AttributeError at /api/ Exception Value: 'SplitResult' object has no attribute '_replace' </code></pre> <p>This is my first time on Stack Overflow — thanks for the help.</p>
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    1. USmichel.iamit
    1. USVic Smith
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    1. COMy guess is python version mismatch. My 2.7 does indeed have a `_replace` but I can't find docs on it.
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      1. USYuji 'Tomita' Tomita
 

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