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PODjango Templatetags Import Error
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  1. PODjango Templatetags Import Error
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    copied!<p>I've been banging my head against this for a while, but can't seem to figure it out. I've got an app with a set of custom template tags:</p> <pre><code>from django import template from crowd.models import Payment, Project, ProjectCategory register = template.Library() @register.filter def is_customer(user, project): try: return Payment.objects.filter(user=user, project=project).count() &gt; 0 except: return False </code></pre> <p>That throws:</p> <pre><code>'project_tags' is not a valid tag library: ImportError raised loading crowd.templatetags.project_tags: No module named models </code></pre> <p>The app tree looks like:</p> <pre><code>crowd/ -- __init__.py -- models.py templatetags/ -- __init__.py -- project_tags.py </code></pre> <p>Importing from just models and crowd.models both give me the same error.</p> <p>Traceback: <a href="http://pastebin.com/6JYPT5qF" rel="nofollow">here</a></p> <h2>Update</h2> <p>I was working on something unrelated when I noticed this was broken, so I reverted to an earlier, known working version of the project. Still the same problem, so I think Daniels answer about the PYTHONPATH is correct, however, how can I repair this?</p> <pre><code>&gt;&gt;&gt; import sys &gt;&gt;&gt; sys.path ['/Users/****/Documents/dev/product/src/Product', ...] </code></pre> <p>The __init__.py's are all there all the way down, and crowd is in Product, so shouldn't it be on the path?</p> <h2>Update 2</h2> <p>I've done some investigating in the shell:</p> <pre><code>&gt;&gt;&gt; from crowd.models import * &gt;&gt;&gt; from crowd.managers import * &gt;&gt;&gt; from crowd.constants import * &gt;&gt;&gt; from crowd.templatetags import * &gt;&gt;&gt; from crowd.templatetags import project_tags Traceback (most recent call last): File "&lt;console&gt;", line 1, in &lt;module&gt; File "/Users/Murph/Documents/dev/product/src/Product/crowd/templatetags/project_tags.py", line 4, in &lt;module&gt; from crowd.forms import SearchForm File "/Users/Murph/Documents/dev/product/src/Product/crowd/forms.py", line 5, in &lt;module&gt; from crowd.models import Payment, Project, ProjectUpdate, GalleryPhoto ImportError: No module named models &gt;&gt;&gt; </code></pre> <p>Still don't know <em>why</em> specifically that's failing, especially since the blanket import works.</p> <h2>Update 3</h2> <p>Took me a while to see that the shell command was giving a more useful message than the django one, which led to this:</p> <p>Turns out it wasn't even related to project_tags directly, it just wasn't a very useful error message. The import in project_tags.py of:</p> <pre><code> from crowd.forms import SearchForm </code></pre> <p>was calling:</p> <pre><code>from crowd.models import Payment, Project, RewardLevel, ProjectUpdate, GalleryPhoto </code></pre> <p>in forms.py, which should have been:</p> <pre><code>from models import Payment, Project, RewardLevel, ProjectUpdate, GalleryPhoto </code></pre> <p>I'll add this as the answer when I can, apparently can't until 8 hours later.</p>
 

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