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PODjango NoReverseMatch error
 

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    <p>I am new to Django and have started working on a mature Django project.</p> <p>I want to add a new page to the user account screens, and link to it. But I am getting a NoReverseMatch error.</p> <p>To /users/urls.py I added:</p> <pre><code>url(r'^panel/history$', 'theproject.users.views.history', name='account_history' ), </code></pre> <p>...which is consistent with the line above it:</p> <pre><code>url(r'^panel$', 'theproject.users.views.control_panel', name='account_panel' ), </code></pre> <p>To /users/views.py I added:</p> <pre><code>@login_required def history(request): return render_to_response('users/ourbrand_history.html', {}, context_instance=RequestContext(request)) </code></pre> <p>...which is consistent with the line above it:</p> <pre><code>@login_required def control_panel(request): return render_to_response('users/ourbrand_panel.html', {}, context_instance=RequestContext(request)) </code></pre> <p>To /templates/users/ourbrand_panel.html I added:</p> <pre><code>&lt;a href="{% url account_history %}"&gt;History&lt;/a&gt; </code></pre> <p>...which is consistent with the line above it:</p> <pre><code>&lt;a href="{% url account_panel %}"&gt;Home&lt;/a&gt; </code></pre> <p>Now when I load /panel I get a TemplateSyntaxError: NoReverseMatch.</p> <pre><code>Reverse for 'account_history' with arguments '()' and keyword arguments '{}' not found. </code></pre> <p>UPDATE: As a test, I removed my link in the template -- and /panel loads fine. If I then delete /users/urls.py and /users/views.py /panel still loads. I have deleted all cookies, history etc. Do I have to run a command at the terminal (like rake in ruby) to commit changes to urls.py? Or should changes 'just work'? </p>
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    1. COAs far as I can tell, everything looks correct (although trailing slashes are a good idea, as @pastylegs says). Is there possibly something you didn't cut/paste, some minor syntax error in another line that might be affecting it? Maybe an extra quote " or something that changes how the template reads?
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    2. COAnd (although I presume you cut/paste the code and what is shown is correct) - you might double-check that you consistently used underscores `_` everywhere, and didn't accidently use a hyphen `-` :) I was just testing my named URLs, switching the hyphens I use for underscores (which worked). But when I mixed them, it generated the same error.
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    3. COIf you're running the Django development server, all file changes cause the server to reload the files, so you don't have to commit anything. However, in a template - if a variable doesn't exist, it just evaluates to an empty string, it doesn't give you any error, so the page will load fine.
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