View a Workflow Run's Errors and Warnings

Modified on Wed, 15 Nov, 2023 at 4:17 PM

When working with Workflow scripting in LabOperator, it is common for users to make mistakes in the YAML file. To encounter that, LabOperator provides its feature to show errors and warnings after checking the uploaded YAML file, and during the execution of a Workflow Run.

User case of uploading YAML with scripting errors

There are many possible errors during workflow development, but they can be mainly categorized into:

LabOperator Schema invalidation errors
Design logic errors

Schema invalidation errors when uploading to LabOperator

In this example YAML script file, there is a typo that the “stepOne” is not correctly defined in the “steps” section of the Workflow.

schema_version: '1.0.1'
info:
  version: '0.0.1'
  uuid: f7cfccc4-204e-4c32-be6f-33a769439d1e
  title: Errors and Warnings Test: LO Schema Invalidation


fields:
  testField:
    type: string
    hidden: true


steps:
stepOne: # Schema invalidation here
  info:
    title: Test
 
  substeps:
    - primary: Test
      expandDescription: true
      description: |
        This is a test YAML file


        !{{testField}}
flow:
  - stepOne

When uploading to LabOperator, in the same window, the details of Schema invalidation could be seen.

Logic errors during the execution of Workflow Run

Many cases would cause Workflow Runs to fail during the execution, namely, wrong data fetching or accessing, wrong device selection with missing channels and commands, unallowed webhooks, etc.

In this example YAML script file, there is a button to trigger assigning values to a string field. To show the error notification in LabOperator, the assigned value is bound to the undefined field. This is a data fetching error during the execution of a Workflow Run.

schema_version: '1.0.1'
info:
  version: '0.0.2'
  uuid: f7cfccc4-204e-4c32-be6f-33a769439d1e
  title: Errors and Warnings Test: Logic design


fields:
  testField:
    type: string
    hidden: true


steps:
  stepOne:
    info:
      title: Test
   
    substeps:
      - primary: Test
        expandDescription: true
        description: |
          This is a test YAML file


          !{{testField}}
       
        buttons:
          - label: Test
            key: keyTest
            color: secondary


        behaviors:
          - when:
              on_manual:
                key: keyTest
            do:
              - set_field:
                  field: testField
                  value: missingField # This is a logic error


flow:
  - stepOne

After uploading this test script to LabOperator and starting a Workflow Run, when clicking on the button to assign value to the ‘testField’, there is a notification: WorkflowUtils::ScriptingError: no value provided for variables: missingField. If users start another Workflow Run, they will not see this notification.