Expression Rule

Hi,

Are you looking for an expression to check if RollNumber1 and RollNumber2 both exist in the database?

a!localVariables(
  local!dataSet: a!queryEntity(
    entity: "< DSE_Constant >",
    query: a!query(
      logicalExpression: a!queryLogicalExpression(
        operator: "AND",
        filters: {
          a!queryFilter(
            field: "rollnumber",
            operator: "in",
            value: { "AB000", "AB0001" }
          )
        },
        ignoreFiltersWithEmptyValues: true
      ),
      pagingInfo: a!pagingInfo(startIndex: 1, batchSize: 50)
    ),
    fetchTotalCount: true
  ),
  if(
    local!dataSet.totalCount = length({ "AB000", "AB0001" }),
    "All Values Present",
    if(
      local!dataSet.totalCount >= 1,
      "Partially Present",
      "Not Present"
    )
  )
)

What if one is present and another is not present .

If a user is entering two at a same time . If both are present then it should be restricted and if only one  is present and another not then also it should be restricted and if both are not present then it should continue

Use the below expression

  if(
    local!dataSet.totalCount = 0,
    true, /*continue*/
    false, /*Restricted */
  )

Use the below expression

  if(
    local!dataSet.totalCount = 0,
    true, /*continue*/
    false, /*Restricted */
  )