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From Jason Priem <>
Subject Find CouchDB docs missing an arbitrary field
Date Tue, 31 May 2011 21:03:44 GMT
Hi all,
I need a CouchDB view where I can get back all the documents that don't 
have an arbitrary field. This is easy to do if you know in advance what 
fields a document *might* not have. For example[1], this lets you send 
view/my_view/?key="foo" to easily retrieve docs without the "foo" field:

function (doc) {
   var fields = [ "foo", "bar", "etc" ];

   for (var idx in fields) {
     if (!doc.hasOwnProperty(fields[idx])) {
       emit(fields[idx], 1);

However, you're limited to asking about the three fields set in the 
view; something like view/my_view/?key="baz" won't get you anything, 
even if you have many docs missing field baz. I need a view where it 
will--where I don't need to specify possible missing fields in advance. 
Any thoughts?


(apologies for crosspost at 

Jason Priem
UNC Royster Fellow
School of  Information and Library Science
University of North Carolina at Chapel Hill

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