Validation

Hey Guys,

I have a database table that contains teams that have applied to the competition. I want to check the validation, if I insert team and competition to apply that already exists in the table displays as "Already applied.

a!formLayout(
    label: "Apply Team to Competition",
    contents: {
      a!sectionLayout(
        label: "",
        contents: {
          a!columnsLayout(
            columns: {
              a!columnLayout(
                contents: {
                  a!pickerFieldRecords(
                    label: "Choose a Team",
                    recordType: 'recordType!{9590f767-061f-48ac-850e-63e14f7db91d}SGDC Dance Team',
                    value: ri!map.teamId,
                    saveInto: ri!map.teamId,
                    showRecordLinks: false,
                    maxSelections: 1,
                    required: true
                  )
                }
              ),
              a!columnLayout(
                contents: {
                  a!pickerFieldRecords(
                    label: "Choose a Competition",
                    recordType: 'recordType!{fa469098-7d29-4880-bf7d-18b43769b332}SGDC Dance Competition',
                    value: ri!map.compId,
                    saveInto: ri!map.compId,
                    showRecordLinks: false,
                    maxSelections: 1,
                    required: true,
                    validations: ""
                  )
                }
              )
            }
          )
        }
      )
    },
    buttons: a!buttonLayout(
      primaryButtons: {
        a!buttonWidget(
          label: "Apply",
          saveInto: {},
          submit: true,
          style: "PRIMARY",
          validate: true
        )
      },
      secondaryButtons: {
        a!buttonWidget(
          label: "Cancel",
          value: true,
          saveInto: ri!cancel,
          submit: true,
          style: "NORMAL",
          validate: false
        )
      }
    )
  )