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POHow to reference other documents in a couchDB view (joining like functionality)
 

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  1. POHow to reference other documents in a couchDB view (joining like functionality)
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    <p>We have a CouchDB representation of an XML database which we use to power a javascript based front-end for manipulating the XML documents. The basic structure is a simple 3 level hierarchy. i.e.</p> <p>A -> B -> C</p> <p>A: Parent document (type A) B: any number of child documents of parent type A C: any number of child documents of parent type B</p> <p>We represent these 3 document types in CouchDB with a <code>type</code> attribute:</p> <p>e.g. </p> <pre><code>{ "_id":"llgc-id:433", "_rev":"1-3760f3e01d7752a7508b047e0d094301", "type":"A", "label":"Top Level A document", "logicalMap":{ "issues":{ "1":{ "URL":"http://hdl.handle.net/10107/434-0", "FILE":"llgc-id:434" }, "2":{ "URL":"http://hdl.handle.net/10107/467-0", "FILE":"llgc-id:467" etc... } } } } { "_id":"llgc-id:433", "_rev":"1-3760f3e01d7752a7508b047e0d094301", "type":"B", "label":"a B document", } </code></pre> <p>What I want to do is produce a view which returns documents just like the A type but includes the label attribute from the B document within the logicalMap list e.g.</p> <pre><code>{ "_id":"llgc-id:433", "_rev":"1-3760f3e01d7752a7508b047e0d094301", "type":"A", "label":"Top Level A document", "logicalMap":{ "issues":{ "1":{ "URL":"http://hdl.handle.net/10107/434-0", "FILE":"llgc-id:434", "LABEL":"a B document" }, "2":{ "URL":"http://hdl.handle.net/10107/467-0", "FILE":"llgc-id:467", "LABEL":"another B document" etc... } } } } </code></pre> <p>I'm struggling to get my head around the best way to perform this. It looks like it should be fairly simple though! </p>
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