Pagination Works From Record Source but Not Record Listing

I have a non-synced REST API that I am using to fetch data via an integration. This endpoint supports paging. In both the record data source and the integration, when I put a a!pagingInfo(x, y), in the pagingInfo test inputs, the data increments through pages correctly according to the values I give for x and y.

But, in the data model test listing and the record list URL, the first 50 records appear (as expected) with the correct record total (more than 1,000), but when I click the next button, the next page is blank and says "No items available". I can click the previous button, and the first 50 records display again. The Paging Info drop down on the data model page is mapped to the correct rule input on the record data source.

The Appian version is 23.2.

Here is my code for the dataSubset in the record data source:

a!dataSubset(
  startIndex: ri!pagingInfo.startIndex,
  batchSize: ri!pagingInfo.batchSize,
  totalCount: local!integrationResponse.result.body.total_items,
  data: a!forEach(
    local!integrationResponse.result.body.items,
    cast(
      'type!{urn:com:appian:types:YYY}YYY_MyRecordType',
      fv!item
    )
  ),
  identifiers: a!forEach(
    local!integrationResponse.result.body.items,
    fv!item.id
  )
),

I cannot seem to find anything wrong. What am I missing?

UPDATE:

The problem was that I needed to convert start index into a page number.

Much appreciation for the tremendous effort to help from @

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Parents Reply Children
  • Like the definition of the columns?

    {
      a!gridColumn(
        label: "Col1",
        sortField: 'recordType!{4d44effc-c462-4c70-b1aa-87905a73c395}YYY_MyRecord.fields.{col1}col1',
        value: fv!row['recordType!{4d44effc-c462-4c70-b1aa-87905a73c395}YYY_MyRecord.fields.{col1}col1']
      ),
      a!gridColumn(
        label: "Col2",
        sortField: 'recordType!{4d44effc-c462-4c70-b1aa-87905a73c395}YYY_MyRecord.fields.{col2}col2',
        value: fv!row['recordType!{4d44effc-c462-4c70-b1aa-87905a73c395}YYY_MyRecord.fields.{col2}col2']
      ),
      a!gridColumn(
        label: "Col3",
        sortField: 'recordType!{4d44effc-c462-4c70-b1aa-87905a73c395}YYY_MyRecord.fields.{col3}col3',
        value: fv!row['recordType!{4d44effc-c462-4c70-b1aa-87905a73c395}YYY_MyRecord.fields.{col3}col3']
      ),
      a!gridColumn(
        label: "Col4",
        sortField: 'recordType!{4d44effc-c462-4c70-b1aa-87905a73c395}YYY_MyRecord.fields.{col4}col4',
        value: fv!row['recordType!{4d44effc-c462-4c70-b1aa-87905a73c395}YYY_MyRecord.fields.{col4}col4']
      ),
      a!gridColumn(
        label: "Col5",
        sortField: 'recordType!{4d44effc-c462-4c70-b1aa-87905a73c395}YYY_MyRecord.fields.{col5}col5',
        value: fv!row['recordType!{4d44effc-c462-4c70-b1aa-87905a73c395}YYY_MyRecord.fields.{col5}col5']
      ),
      a!gridColumn(
        label: "Col6",
        sortField: 'recordType!{4d44effc-c462-4c70-b1aa-87905a73c395}YYY_MyRecord.fields.{col6}col6',
        value: fv!row['recordType!{4d44effc-c462-4c70-b1aa-87905a73c395}YYY_MyRecord.fields.{col6}col6']
      ),
      a!gridColumn(
        label: "Col7",
        sortField: 'recordType!{4d44effc-c462-4c70-b1aa-87905a73c395}YYY_MyRecord.fields.{col7}col7',
        value: fv!row['recordType!{4d44effc-c462-4c70-b1aa-87905a73c395}YYY_MyRecord.fields.{col7}col7']
      ),
      a!gridColumn(
        label: "Col8",
        sortField: 'recordType!{4d44effc-c462-4c70-b1aa-87905a73c395}YYY_MyRecord.fields.{col8}col8',
        value: fv!row['recordType!{4d44effc-c462-4c70-b1aa-87905a73c395}YYY_MyRecord.fields.{col8}col8']
      ),
      a!gridColumn(
        label: "Col9",
        sortField: 'recordType!{4d44effc-c462-4c70-b1aa-87905a73c395}YYY_MyRecord.fields.{col9}col9',
        value: fv!row['recordType!{4d44effc-c462-4c70-b1aa-87905a73c395}YYY_MyRecord.fields.{col9}col9']
      ),
      a!gridColumn(
        label: "Col10",
        sortField: 'recordType!{4d44effc-c462-4c70-b1aa-87905a73c395}YYY_MyRecord.fields.{col10}col10',
        value: fv!row['recordType!{4d44effc-c462-4c70-b1aa-87905a73c395}YYY_MyRecord.fields.{col10}col10']
      ),
      a!gridColumn(
        label: "Col11",
        sortField: 'recordType!{4d44effc-c462-4c70-b1aa-87905a73c395}YYY_MyRecord.fields.{col11}col11',
        value: fv!row['recordType!{4d44effc-c462-4c70-b1aa-87905a73c395}YYY_MyRecord.fields.{col11}col11']
      )
    }
    

  • 0
    Certified Lead Developer
    in reply to Ryan Daniels

    :-) I need to see all the code, except the columns!

    The grid needs to interact with your expression to read paged data from that API. There are a few way to do so and I am interested in the way how you did it.

  • I did not create an interface. I am just using the grid record list on the data record. I did not write the code for it.

    How do I give you the code of the record list on the data record? I don't see any buttons that let me see the whole thing, just the columns. As far as I can see, Appian does not give a way to see that, but hopefully I am wrong.

  • 0
    Certified Lead Developer
    in reply to Ryan Daniels

    OK. I understand. Then, there is no code.

    Can you share the record source configuration? I mean, assuming that the API supports paging, the integration successfully applies paging, and the wrapper expression as well, the only spot left, is the source config.

  • 0
    Certified Lead Developer
    in reply to Ryan Daniels

    Hm ... again, I do not see any obvious issues.

    Can you try to create an interface and add a grid to it that uses this record? The data preview in the record has some limitations.

  • I created the interface, and it pulls however many records are specified in page size, but then next pages say no records. If I put 10, it pulls 10 records from the REST service for the first page. If I put 300, it pulls 300 records from the REST service. In both cases, all of the next pages give blank results.

    {
      a!gridField(
        label: "Read-only Grid",
        labelPosition: "ABOVE",
        data: 'recordType!{4d44effc-c462-4c70-b1aa-87905a73c395}YYY Record',
        pageSize: 300,
        columns: {
          a!gridColumn(
            label: "YYY Column",
            value: fv!row['recordType!{4d44effc-c462-4c70-b1aa-87905a73c395}YYY Record.fields.{some_column}some_column']
          )
        },
        validations: {}
      )
    }

  • 0
    Certified Lead Developer
    in reply to Ryan Daniels

    Can you try to enable HTTP logging in the integration, do a few calls and check that the data is as expected?

  • I enabled logging for the integration. If I do to system logs, where do I find the logs related to these requests?

  • 0
    Certified Lead Developer
    in reply to Ryan Daniels

    As per the documentation in integration_req_resp_activity.log