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PODjango regroup many to many field
 

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  1. PODjango regroup many to many field
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    <p>I'm having some trouble making this work on the template, wonder if I could get some help:</p> <p>I have a table with plants in it, and the plant table has a many-to-many relationship with the category table. Such that a plant can be in one or more categories. I'm using Django 1.5, here are the models:</p> <pre><code>class Plant(models.Model): scientific_name = models.CharField(max_length=128, unique=True) category = models.ManyToManyField(Category) ... class Category(models.Model): category = models.CharField(max_length=128) ... </code></pre> <p>And the view:</p> <pre><code>class PlantListView(ListView): context_object_name='plant_list' template_name='plants/index.html' model = Plant def get_queryset(self): return self.model.objects.all().order_by('category') </code></pre> <p>I've tried this:</p> <pre><code>{% regroup plant_list by category as category_list %} &lt;ul&gt; {% for category in category_list %} &lt;li&gt;{{ category.grouper }} &lt;ul&gt; {% for plant in plant_list.list %} &lt;li&gt;{{ plant.scientific_name }}&lt;/li&gt; {% endfor %} &lt;/ul&gt; &lt;/li&gt; {% endfor %} &lt;/ul&gt; </code></pre> <p>But all I get is:</p> <pre><code>&lt;django.db.models.fields.related.ManyRelatedManager object at 0x1053bfb90&gt; &lt;django.db.models.fields.related.ManyRelatedManager object at 0x1053bfbd0&gt; &lt;django.db.models.fields.related.ManyRelatedManager object at 0x1053bfd50&gt; </code></pre> <p>Of course, what I really want is:</p> <ul> <li>Annuals <ul> <li>Ageratum houstonianum </li> <li>Abutilon hybridum </li> <li>Acalypha hispida</li> </ul></li> <li>Bulbs Perennial <ul> <li>Ageratum houstonianum</li> <li>Allium giganteum </li> <li>Allium karataviense</li> </ul></li> </ul> <p>... etc ...</p> <p>Note that the same plant can exist in multiple categories, and should be listed in each.</p> <p>What am I doing wrong?</p> <p>Thanks in advance!!</p>
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    1. USRob L
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      1. VTUpMod
    1. COtry this: `{% regroup plant_list by category.category as category_list %}`. If I am not wrong, you could use `.` in template syntax.
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      1. USFallenAngel
    2. COThat's not it. `category_list` == `[{u'list': [<Plant: Acidanthera bicolor>, <Plant: Achimenes>, <Plant: Acidanthera bicolor>], u'grouper': None}]`. grouper is empty.
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      1. USRob L
 

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Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

Related data can be related in a to-one or a to-many fashion. Captions of data related in a to-many fashion link to a list view showing a filtered view of the table.

Try moving around until you find a non-empty to-many entry and click on the label to get to one. You can move back to the root by clicking on the database name in the header.

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