Query a nested CDT

RE: Query a nested CDT

Acacio Barrado — Thu, 01 Jul 2021 23:34:28 GMT

Hi Marta,

What would be the result of this query:

a!queryEntity(
      entity: cons!P2P_POINTER_ENT_PRODUCT_ORDERED_DETAILS,
      query: a!query(
        logicalExpression: a!queryLogicalExpression(
          operator: "AND",
          filters: {
            a!queryFilter(
              field: "productOrdered.productOrderedId",
              operator: "=",
              value: ri!productOrderedId
            )
          }
        ),
        pagingInfo: a!pagingInfo(startIndex: 1, batchSize: - 1)
      )
    ).data

RE: Query a nested CDT

Marta — Thu, 01 Jul 2021 09:34:46 GMT

Hi Acacio,

Thanks for the information.

Our PurchaseOrder (Parent) has the possibility to have many (child array) ProductOrdered.

I'm able to get the information regarding both, but whenever I query the child via expression rule, I never get a reference to the parent.

For example, using this code:

if(
  rule!P2P_isNullOrEmpty(ri!productOrderedId),
  null,
  cast(
    'type!{urn:com:appian:types:P2P}P2P_ProductOrderedDetails?list',
    a!queryEntity(
      entity: cons!P2P_POINTER_ENT_PRODUCT_ORDERED_DETAILS,
      query: a!query(
        logicalExpression: a!queryLogicalExpression(
          operator: "AND",
          filters: {
            a!queryFilter(
              field: "productOrderedId",
              operator: "=",
              value: ri!productOrderedId
            )
          }
        ),
        pagingInfo: a!pagingInfo(startIndex: 1, batchSize: - 1)
      )
    ).data
  )
)

I'm able to retrieve the information regarding a specific ProductOrdered, but I never get a reference to the parent.

My goal is to be able to retrieve the PurchaseOrder number via a ProductOrdered.

Nevertheless, I do have a reference to the parent in the database:

I just can't seem to retrieve the info via expression rule.

RE: Query a nested CDT

Acacio Barrado — Thu, 01 Jul 2021 03:15:16 GMT

Hi Marta,

Im not sure if fully understood your scenario but seems to me that what you described is correct. In your PurchaseOrderDetails you will have and column called productOrdered that should have the PK from the ProductOrderedDetails.

As you can see in the link that you attached in your post, you can create a normal queryEntity using the Pk of the PurchaseOrderDetails and in the return of this query you will receive all the ProductOrderedDetails related.

To access the data in there you can use index or dot notation in the productOrdered.

Please correct me if I did not understood your scenario.

Regards,

Acacio B.