<p>I design a report with Birt on datasource mongoDB, when i create a dataset i can select a collection and select the data for my report, but i need using a filter to select only any document not all, so i have a param (factura=1000) created in Birt.</p>
<p> </p>
<p>So, in query expression i put:</p>
<p> </p>
<p>{"data.dam.fac.num":"'+params["factura"].value+'"} </p>
<p> </p>
<p>but i have error when see preview result, the error is:</p>
<p> </p>
<div>org.eclipse.datatools.connectivity.oda.OdaException: Error in parsing the JSON expression: {"data.dam.fac.num":"'+params["factura"].value+'"} ;</div>
<div> com.mongodb.util.JSONParseException: </div>
<div>{"data.dam.fac.num":"'+params["factura"].value+'"}</div>
<div> </div>
<div> </div>
<div>How, i can doit this??</div>
