grid column coming as empty

Hi , I am building a document upload form after uploading the document it should be populating in the gridfield with the link format where user can download the lfile. but that field is coming as empty.  This is my code. The documentId field is  text now, we don't have access to edit it now . can changing the datatype will fix the issue or is there anything  elseI have to look into?

a!localVariables(
  local!documentId: null, 
  local!category: null,  
  local!comment: null,    
  local!showUploadSection: false(), 
  local!npdoDocumentList: ri!npdoDocument,

  a!formLayout(
    contents: {
      a!sectionLayout(
        contents: {
          a!boxLayout(
            label: "Supporting Documents",
            contents: {
              a!gridField(
                data: local!npdoDocumentList, 
                columns: {
                  a!gridColumn(
                    label: "Title",
                    value: a!linkField(
                      
                      label: fv!row['recordType!{a1b2b5cb-c59b-4595-aff1-2d50b50e490a}NPDO Document.fields.{0c0ce663-8d05-43a5-9c23-92394e8102ec}documentId'],
                      links: a!documentDownloadLink(
                        document: tointeger(fv!row['recordType!{a1b2b5cb-c59b-4595-aff1-2d50b50e490a}NPDO Document.fields.{0c0ce663-8d05-43a5-9c23-92394e8102ec}documentId'])
                      )
                    )
                  ),
                  a!gridColumn(
                    label: "Category",
                    value: fv!row['recordType!{a1b2b5cb-c59b-4595-aff1-2d50b50e490a}NPDO Document.fields.{408a7879-6ab6-45cb-a35e-7330c9caf15e}category']
                  ),
                  a!gridColumn(
                    label: "Comments",
                    value: fv!row['recordType!{a1b2b5cb-c59b-4595-aff1-2d50b50e490a}NPDO Document.fields.{dfc46fd3-86fc-4d85-b663-544b3b9d1031}comment']
                  ),
                  a!gridColumn(
                    label: "Uploaded On",
                    value: fv!row['recordType!{a1b2b5cb-c59b-4595-aff1-2d50b50e490a}NPDO Document.fields.{7481670c-f621-4872-bd46-d6d20909e139}uploadedOn']
                  ),
                  a!gridColumn(
                    label: "Uploaded By",
                    value: fv!row['recordType!{a1b2b5cb-c59b-4595-aff1-2d50b50e490a}NPDO Document.fields.{3ad4e016-cf0f-4bf3-8231-ef8cbf9bed92}uploadedBy']
                  ),
                  
                }
              )
            },
            style: "INFO",
            labelSize: "MEDIUM"
          )
        }
      ),
      a!sectionLayout(
        contents: {
          a!buttonLayout(
            primaryButtons: {
              a!buttonWidget(
                label: "Upload Docs",
                submit: false, 
                style: "SOLID",
                icon: "file-upload",
              
                saveInto: a!save(local!showUploadSection, true()),
                showWhen: not(local!showUploadSection) 
              )
            }
          )
        }
      ),
      a!sectionLayout(
        contents: {
          a!boxLayout(
            label: "Upload Document",
            contents: {
              a!fileUploadField(
                label: "Choose a file",
                required: true,
                target: cons!NPDO_REQUEST_DOCUMENTS_FOLDER, 
                maxSelections: 1, 
                value: local!documentId, 
                labelPosition: "ADJACENT",
                saveInto: local!documentId
              ),
              a!dropdownField(
                choiceLabels: { "New Request", "Miscellaneous" },
                choiceValues: { "New Request", "Miscellaneous" },
                label: "Category",
                required: true,
                labelPosition: "ADJACENT",
                placeholder: "Document category",
                value: local!category,
                saveInto: local!category
              ),
              a!paragraphField(
                label: "Comments",
                labelPosition: "ADJACENT",
                required: true,
                value: local!comment, 
                saveInto: local!comment
              )
            }
          )
        },
        showWhen: local!showUploadSection 
      )
    },
    buttons: a!buttonLayout(
      primaryButtons: {
        a!buttonWidget(
          label: "Submit",
          submit: true, 
          style: "SOLID",
          saveInto: {
            
            a!save(
              local!npdoDocumentList,
              append(
                local!npdoDocumentList,
              'recordType!{a1b2b5cb-c59b-4595-aff1-2d50b50e490a}NPDO Document'(
                'recordType!{a1b2b5cb-c59b-4595-aff1-2d50b50e490a}NPDO Document.fields.{0c0ce663-8d05-43a5-9c23-92394e8102ec}documentId': local!documentId,
               'recordType!{a1b2b5cb-c59b-4595-aff1-2d50b50e490a}NPDO Document.fields.{408a7879-6ab6-45cb-a35e-7330c9caf15e}category': local!category,
               'recordType!{a1b2b5cb-c59b-4595-aff1-2d50b50e490a}NPDO Document.fields.{dfc46fd3-86fc-4d85-b663-544b3b9d1031}comment': local!comment,
               'recordType!{a1b2b5cb-c59b-4595-aff1-2d50b50e490a}NPDO Document.fields.{13c5c9df-b703-4040-baf4-64a65ffc62f3}uploadedBySOEID': loggedInUser(),
               'recordType!{a1b2b5cb-c59b-4595-aff1-2d50b50e490a}NPDO Document.fields.{7481670c-f621-4872-bd46-d6d20909e139}uploadedOn': now(),
               'recordType!{a1b2b5cb-c59b-4595-aff1-2d50b50e490a}NPDO Document.fields.{041e09bf-8b95-4f82-87c6-6289b8c22b57}isActive': 1,
               'recordType!{a1b2b5cb-c59b-4595-aff1-2d50b50e490a}NPDO Document.fields.{3ad4e016-cf0f-4bf3-8231-ef8cbf9bed92}uploadedBy': concat(user(loggedInUser(), "firstName")," ",user(loggedInUser(), "lastName"))
                  
                )
              )
            ),
            a!save(ri!npdoDocument,local!npdoDocumentList),
            
            a!save(local!documentId, null),
            a!save(local!category, null),
            a!save(local!comment, null),
            a!save(local!showUploadSection, false())
          }
        )
      },
      secondaryButtons: {
        a!buttonWidget(
          label: "Cancel",
          submit: false,
          style: "OUTLINE",
          validate: false,
          saveInto: {
           
            a!save(local!documentId, null),
            a!save(local!category, null),
            a!save(local!comment, null),
            a!save(local!showUploadSection, false())
          }
        )
      },
      showWhen: local!showUploadSection 
    )
  )
)