https://community.qlik.com/t5/Talend-Studio/JSON-TDM-and-MongoDB-input-and-output-w-o-loosing-nested/m-p/2229418#M20366 I would like to be able to process MongoDB (JSON) hierarchies in and out out Talend Integration &amp; Mapping perspectives without loosing nested hierarchies. <BR />The mapping perspective works fine with JSON but how do I get nested loops in and out of TDM in a integration Job. <BR />The problem is not so much moving things at the top of the hierarchy at a field level but more how JSON is defined as both input and output in the DI metadata. I don't think nested looping is possible. <BR />This may be possible today and I might be miss-using components or we have to consider how effective we will be in the MongoDB area without these capabilities.&nbsp; <BR />It would be nice to treat JSON hierarchies more like we treat XML. Leave them intact and maybe even have a TJSONMAP component and then move at the field level leaving all hierarchies intact. Tue, 24 Feb 2015 18:10:28 GMT Anonymous 2015-02-24T18:10:28Z https://community.qlik.com/t5/Talend-Studio/JSON-TDM-and-MongoDB-input-and-output-w-o-loosing-nested/m-p/2229418#M20366 I would like to be able to process MongoDB (JSON) hierarchies in and out out Talend Integration &amp; Mapping perspectives without loosing nested hierarchies. <BR />The mapping perspective works fine with JSON but how do I get nested loops in and out of TDM in a integration Job. <BR />The problem is not so much moving things at the top of the hierarchy at a field level but more how JSON is defined as both input and output in the DI metadata. I don't think nested looping is possible. <BR />This may be possible today and I might be miss-using components or we have to consider how effective we will be in the MongoDB area without these capabilities.&nbsp; <BR />It would be nice to treat JSON hierarchies more like we treat XML. Leave them intact and maybe even have a TJSONMAP component and then move at the field level leaving all hierarchies intact. Tue, 24 Feb 2015 18:10:28 GMT https://community.qlik.com/t5/Talend-Studio/JSON-TDM-and-MongoDB-input-and-output-w-o-loosing-nested/m-p/2229418#M20366 Anonymous 2015-02-24T18:10:28Z https://community.qlik.com/t5/Talend-Studio/JSON-TDM-and-MongoDB-input-and-output-w-o-loosing-nested/m-p/2229419#M20367 Hi&nbsp; <BR />Can tExtractJsonFields fit the need? which&nbsp;can be used to extract data from a json string after you read the nested loop as a node.&nbsp; <BR />Best regards <BR />Shong Fri, 27 Mar 2015 00:58:39 GMT https://community.qlik.com/t5/Talend-Studio/JSON-TDM-and-MongoDB-input-and-output-w-o-loosing-nested/m-p/2229419#M20367 Anonymous 2015-03-27T00:58:39Z