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The page "TagsInsideDocuments" has been deleted by JoanTouzet: https://wiki.apache.org/couchdb/TagsInsideDocuments?action=diff&rev1=6&rev2=7 - #redirect Tags_inside_documents - Tags are stored as a list of strings inside the document: - {{{ - { - "_id":"123BAC", - "_rev":"946B7D1C", - "type":"post", - "subject":"I like Planktion", - "author":"Rusty", - "created":"2006-08-15T17:30:12Z-04:00", - "body":"I decided today that I don't like baseball. I like plankton.", - "tags":["plankton", "baseball", "decisions"] - } - }}} - - == CouchDB Views == - - '''Retrieve all tags with their counts:''' - - ''map'' - - {{{ - function(doc) { - if (doc.type == 'post' && doc.tags) { - doc.tags.forEach(function(tag) { - emit(tag, 1); - }); - } - } - }}} - - ''reduce'' - - {{{ - function(keys, values) { - return sum(values); - } - }}} - - Note: when retrieving data from this view, if the results are reduced to a single row, you may need to use the ?group=true option to get counts reduced by tag. This may be a feature in version 0.8.0 and forward? see HttpViewApi. - - '''Retrieve documents by a specific tag:''' - - ''map'' - - {{{ - function(doc) { - if (doc.type == 'post' && doc.tags) { - doc.tags.forEach(function(tag) { - emit(tag, doc); - }); - } - } - }}} -
