mongodb - Mule Mongo Connector to produce INNER JOIN results -


i have 2 collections, 1 of organizations , 1 of brands within organization, , trying produce result set have brands related organization show as nested json inside organization json result.

the code getting results looks this, , return expected results, final json has quotes in each brad. how can include brands' json without including string?

query single org mongo id mongo:

    <mongo:find-one-object-using-query-map config-ref="mdb_config" collection="orgs" doc:name="fetch object mongo">         <mongo:query-attributes>                             <mongo:query-attribute key="_id">#[new org.bson.types.objectid(flowvars.orgid)]</mongo:query-attribute>         </mongo:query-attributes>     </mongo:find-one-object-using-query-map>     <mongo:db-object-to-map doc:name="map mongo object hashmap"/>

query orgs brands list:

    <foreach collection="#[payload.brands]" doc:name="for each" rootmessagevariablename="rootmessage">         <mongo:find-one-object-using-query-map config-ref="mdb_config" collection="brands" doc:name="fetch brands org">             <mongo:query-attributes>                                 <mongo:query-attribute key="_id">#[new org.bson.types.objectid(message.payload)]</mongo:query-attribute>             </mongo:query-attributes>         </mongo:find-one-object-using-query-map >          <!-- transform brand mongo json schema compliant json -->             <scripting:transformer doc:name="map mongo object json">                 <scripting:script engine="groovy"><![cdata[                      def builder = new groovy.json.jsonbuilder()                      def root = builder {                          brandid payload._id.tostring()                          //...                          isactive payload.platformheader.isactive                      }                      return builder.toprettystring();                  ]]></scripting:script>             </scripting:transformer>         <expression-component>brandresponses.add(message.payloadas(java.lang.string))         </expression-component>         <logger message="the result #[message.payloadas(java.lang.string)]"  level="info" doc:name="logger"/>     </foreach>      <logger level="info" message="#[brandresponses]"/>             <!-- transform org mongo json schema compliant json -->     <scripting:transformer doc:name="map mongo object json">         <scripting:script engine="groovy"><![cdata[            def brandspayload = flowvars.brandresponses             def builder = new groovy.json.jsonbuilder()             def root = builder {                 orgid payload._id.tostring()                 //...                 isactive payload.platformheader.isactive                 brands(brandspayload.collect {it})             }             return builder.toprettystring();         ]]></scripting:script>     </scripting:transformer>

resulting json

{     "orgid": "5565f305b85c31182a65a6a7",     "isactive": true,     "brands": [         "{         "brandid": "5565f2ff03758e0c189a753d",         "isactive": true         }",         "{         "brandid": "5565f2ff03758e0c189a7594",         "isactive": true         }"     ] }

the problem comes fact store string representation of brands in brandresponses, collect them strings in final json.

note producing json, there's no big gain in using groovy. building maps/lists mel , serializing them json objects/arrays json:object-to-json-transformer way easier (as comparison, grooxy easier xml generation).

in case, fix issue:

  • remove first scripting:transformer
  • replace expression component store brands in maps instead of strings, with: brandresponses.add(["brandid":payload._id.tostring(), "isactive":payload.platformheader.isactive])

i believe should it. if not, may need review collect closure generate json properly.


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