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POdouble regroup in django template
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  1. POdouble regroup in django template
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    copied!<p>i have some output from a django view that requires some sorting. i'm hoping i can do this in the template rather in in code:</p> <p>basically, i need to represent a node/edge graph; however, there may be many edges between two nodes (directed) - therefore i want to create unique id's between them so that my json doesn't get overwritten ('measurement1' and 'measurement2'):</p> <pre><code>nodes: { nodeA: {}, nodeB: {} }, edges: { nodeA: { nodeB: { measurement1: {}, measurement2: {} } } } </code></pre> <p>so my model is basically like this:</p> <pre><code>class Measurement( models.Model ): service = models.ForeignKey( Service, db_index=True ) source_node = models.ForeignKey( Node, related_name='source' ) target_node = models.ForeignKey( Node, related_name='target' ) </code></pre> <p>the problem is that my template currently looks like this (which will overwrite the json :</p> <pre><code>"nodes": &lt;blah&gt; "edges": { {% regroup measurements by source_node_id as source_list %} {% for source in source_list %} "{{ source.grouper }}": { {% for item in source.list %} "{{ item.target_node_id }}": { "id": "{{ item.id }}", "service_type": "{{ item.service.service_type|lower }}" }{% if not forloop.last %},{% endif %} {% endfor %} }{% if not forloop.last %},{% endif %} {% endfor %} } </code></pre> <p>which in term gives something like:</p> <pre><code>edges: { nodeA: { nodeB: { id: measurement1, service_type: service1 }, nodeB: { id: measurement2, service_type: service2 } } </code></pre> <p>so basically, i need a nested regroup statement within the <code>for item in source.list</code> for just the measurements that match that particular source and target nodes within that loop; but i can't seem to get it to work. any suggestions?</p>
 

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