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The following page has been changed by ChrisAnderson: http://wiki.apache.org/couchdb/Formatting_with_Show_and_List The comment on the change is: documentation for list funs ------------------------------------------------------------------------------ == Listing Views == + List funcitons are stored under the `lists` key of design documents. Here's an example desgin doc with list functions: + + {{{ + { + "_id" : "_design/examples", + "views" { + "posts-by-date" : "function(doc){...}", + "posts-by-tag" : "function(doc){...}", + "people-by-name" : "function(doc) {...}" + }, + "lists" : { + "index-posts" : "function(head, row, req, row_info) {...}", + "browse-people" : "function(head, row, req, row_info) { ... }" + } + }}} + + These lists are run by querying URLs like: + + {{{ + GET /db/_list/examples/index-posts/posts-by-date?descending=true&limit=10 + + GET /db/_list/examples/index-posts/posts-by-tag?key="howto" + + GET /db/_list/examples/browse-people/people-by-name?startkey=["a"]&limit=10 + + }}} + + List functions have a more interesting signature, as they are passed the head of the view on first invocation, then each row in turn, then called once finally for the tail of the view. They also have the ability to abort iteration early, which is handy for some filtering operations. + + Example list function: + + {{{ + function(head, row, req, row_info) { + if (head) { + return "<p>head: "+JSON.stringify(head)+"</p><ul>""; + } else if (row) { + return "<li>"+JSON.stringify(row)+"</li>"; + } else { + return "</ul><h4>the tail</h4>" + } + } + }}} + + Hopefully that gets you enough to get started. For a more complete set of examples, see the CouchDB test suite, especially show_documents.js and list_views.js +
