pouchDB distinct where column is-open source projects pouchdb/pouchdb

I need equivalent of select distinct(toc.content) from table where acModel='7X';

Here is my Document –

{
    acModel : "7X",
    relYear : 2014,
    optId : 11046,
    optNum : "2.386.ADW0",
    content : "Interior",
    cutInFrom : 253,
    cutInTo : 9999,
    weight : "Standard"
}

Here are the javascript functions –

createIndex: function () {
    this.createDesignDoc('by_acModel', function (doc) {
        emit(doc.acModel, doc.content);
    });
},
getDistinctContent: function(acModel){
    var result=[];
    function map(opt) {
        emit(opt.acModel, {content: content});
    }
    this.db.query(map,
        function (err, response) {
            for (var i = 0; i < response.total_rows; ++i) {
                if (response.rows[i].key == acModel) {
                     //Over here I am not sure ... Short of handling it manually, I don't know if I can get pouchDB to give distinct
                }
            }
    });
},
createDesignDoc: function(name, mapFunction) {
    var ddoc = {
        _id: '_design/' + name,
        views: {
        }
    };
    ddoc.views[name] = { map: mapFunction.toString() };
    return ddoc;
}
};