todo.yaml

        fulfill-sample:
          type: form
          title: Fulfill Sample
          entity: todo
          input:
          - todo: todo[sample-not-started]
          submit_button: Add Sample
          value: |
            {sample := { sample_type := null() }}
          fields:
          - value_key: sample
            type: fieldset
            fields:
            - value_key: sample_type
              label: Sample Type
              type: entity
              using: radio-group
              required: true
              data:
                entity: sample_type
                title: title
                mask: exists(sample_type_x_todo?todo=$todo)
            - value_key: date_collected
              label: Date Collected
              type: date
            - value_key: collected_by
              label: Collected By
              type: entity
              data:
                entity: user
                title: __title__
            - value_key: tube
              label: Tubes
              type: list
              required: true
              fields:
              - value_key: volume_amount
                label: Volume
                type: number
              - value_key: volume_unit
                label: Unit
                type: enum
                options:
                - label: ml
                  value: ml
                - label: ul
                  value: ul
              - value_key: concentration_amount
                label: Concentration
                type: number
              - value_key: concentration_unit
                label: Concentration Unit
                type: enum
                options:
                - label: ng-ul
                  value: ng-ul
          query: |
            /do(
              create_sample_todo_fulfillment($todo, $sample),
              {id := $todo}
            )