How to create GraphQL request to Filter Content Structures

Issue

• When trying to filter Content Structure ( WebContent > Structures ), and using a wrong syntax, you might get any of the following errors:

• Exception while fetching data (/contentStructureStructuredContents) : null

• "Internal Server Error",classification": "DataFetchingException"

• "contentStructureStructuredContents": null

Environment

• Liferay DXP 7.4

Resolution

• You should use the following template for the request:
  

  {
   contentStructureStructuredContents(contentStructureId: <yourContentStructureId>, filter: "contentFields/yourStructureFieldReference eq 'yourWebContentTextEntry'") {
    items {
     id
      contentFields {
       contentFieldValue {
        data
      }
      label
     }
    }
   }
  }

  You can find and edit the structure's field reference when clicking on the text field and opening the “Advanced” tab.
  
  Note: You should change the contentStructureId to your own.