Filter nested CDT value from QueryEntity Result

If I recall correctly, back when Query Rules came out we ran into a similar situation and were not able to resolve directly in the filtering - sub CDT filtering was not supported, believe that still applies to queryEntity.

How are you using this data? Are you always expecting one item in the DataSubset with one to many equipment, or multiple parents with multiple equipment children?

You may have to do a little manipulation on the result from queryEntity before it is returned to the interface.  In this example, one parent has multiple sub/child CDTs and we filter out any of those children who's "data" field is "b", by casting back to the data types with only what we want to return.

Food for thought:

a!localVariables(
  local!cdt: 'type!{urn:com:gdit:types}chris_test_cdt'(
    id: 1,
    sub_cdt: {
      'type!{urn:com:appian:types}chris_test_cdt_sub'(data: "a"),
      'type!{urn:com:appian:types}chris_test_cdt_sub'(data: "b")
    }
  ),
  
  'type!{urn:com:gdit:types}chris_test_cdt'(
    id: local!cdt.id,
    sub_cdt: a!flatten(
      fn!reject(
        fn!isnull,
        a!forEach(
          items: local!cdt.sub_cdt,
          expression: {
            if(
              fv!item.data="b",
              null,
              'type!{urn:com:appian:types}chris_test_cdt_sub'(
                data: fv!item.data
              )
            )
          }
        )
      )
    )
  )
)

Yes, Chris. Result would return multiple tool service items along with multiple equipment associated (could be 0 or more equipment). 

I will certainly look into your provided thoughts. Much appreciated on the explanation and clear code walk through.

JT

No problem!  

This is an updated example for multiple service items:

a!localVariables(
  local!cdt: {
    'type!{urn:com:gdit:types}chris_test_cdt'(
      id: 1,
      sub_cdt: {
        'type!{urn:com:appian:types}chris_test_cdt_sub'(pId: 1, id: 1, data: "a"),
        'type!{urn:com:appian:types}chris_test_cdt_sub'(pId: 1, id: 2, data: "b"),
        'type!{urn:com:appian:types}chris_test_cdt_sub'(pId: 1, id: 3, data: "b"),
        'type!{urn:com:appian:types}chris_test_cdt_sub'(pId: 1, id: 4, data: "a")
      }
    ),
    'type!{urn:com:gdit:types}chris_test_cdt'(
      id: 2,
      sub_cdt: {
        'type!{urn:com:appian:types}chris_test_cdt_sub'(pId: 2, id: 5, data: "b"),
        'type!{urn:com:appian:types}chris_test_cdt_sub'(pId: 2, id: 6, data: "b"),
        'type!{urn:com:appian:types}chris_test_cdt_sub'(pId: 2, id: 7, data: "a"),
        'type!{urn:com:appian:types}chris_test_cdt_sub'(pId: 2, id: 8, data: "b")
      }
    ),
    'type!{urn:com:gdit:types}chris_test_cdt'(
      id: 3,
      sub_cdt: {
        'type!{urn:com:appian:types}chris_test_cdt_sub'(pId: 3, id: 9, data: "a"),
        'type!{urn:com:appian:types}chris_test_cdt_sub'(pId: 3, id: 10, data: "b"),
      }
    )
  },

  a!flatten(
    a!forEach(
      items: local!cdt,
      expression: {
        a!localVariables(
          local!cdt_active: fv!item,
          'type!{urn:com:gdit:types}chris_test_cdt'(
            id: local!cdt_active.id,
            sub_cdt: a!flatten(
              fn!reject(
                fn!isnull,
                a!forEach(
                  items: local!cdt_active.sub_cdt,
                  expression: {
                    if(
                      fv!item.data="b",
                      null,
                      'type!{urn:com:appian:types}chris_test_cdt_sub'(
                        id: fv!item.id,
                        pId: fv!item.pId,
                        data: fv!item.data
                      )
                    )
                  }
                )
              )
            )
          )
        )
      }
    )
  )
)

a!localVariables(
  local!motorNestedEquipment: a!queryEntity(
    entity: cons!EMS_DB_RM_UPDATE_MOTOR,
    query: a!query(
      pagingInfo: ri!pagingInfo,
      logicalExpression: a!queryLogicalExpression(
        operator: "AND",
        filters: {
          if(
            rule!HAL_checkNullOrEmpty(ri!toolServiceId),
            null,
            a!queryFilter(
              field: "motorToolServiceId",
              operator: "=",
              value: ri!toolServiceId
            )
          ),
          a!queryFilter(
            field: "isActive",
            operator: "<>",
            value: false
          )
        }
      )
    )
  ),
  a!flatten(
    a!forEach(
      items: local!motorNestedEquipment,
      expression: {
        a!localVariables(
          local!cdt_active: fv!item,
          'type!{urn:com:appian:types:EMS}EMS_RmUpdateMotor'(
            motorId: local!cdt_active.motorId,
            motorToolServiceId: local!cdt_active.motorToolServiceId,
            statusId: local!cdt_active.statusId,
            available: local!cdt_active.available,
            updatedBy: local!cdt_active.updatedBy,
            updatedOn: local!cdt_active.updatedOn,
            isActive: local!cdt_active.isActive,
            equipment: a!flatten(
              fn!reject(
                fn!isnull,
                a!forEach(
                  items: local!cdt_active.equipment,
                  expression: {
                    if(
                      fv!item.isActive = false(),
                      null,
                      'type!{urn:com:appian:types}EMS_MotorEquipment'(
                        id: fv!item.id,
                        motorId: fv!item.motorId,
                        sapEquipmentNumber: fv!item.sapEquipmentNumber,
                        createdBy: fv!item.createdBy,
                        createdOn: fv!item.createdOn,
                        updatedBy: fv!item.updatedBy,
                        updatedOn: fv!item.updatedOn,
                        isActive: fv!item.isActive
                      )
                    )
                  }
                )
              )
            )
          )
        )
      }
    )
  )
)

Great! :)

Great! :)