Control Flow

Control flow in Laminar

Control flow basics

Adding if this then that logic in Laminar can be done using either JavaScript or JQ. Here are examples in both languages:

JavaScript Example

(payload) => {
  const { input } = payload;
  
  if ((input.activity_type === "route-destination-status" || 
       input.activity_type === "update-destinations") && 
      /skipped|failed|completed|loaded/.test(String(input.detailed_event)) &&
      input.order_id?.length > 0) {
    return {
      "lam.resolveThenExecute": {
        "lam.workflowId": 60,
        "lam.payload": input,
        "lam.result": { "status": "OK" }
      }
    };
  } else {
    return { "lam.exit": true };
  }
}

JQ Example

.input |
if ((.activity_type == "route-destination-status" or
     .activity_type == "update-destinations") and
    (.detailed_event? | tostring | test("skipped|failed|completed|loaded")) and
    (.order_id | length > 0))
then
{
  "lam.resolveThenExecute": {
    "lam.workflowId": 60,
    "lam.payload": .,
    "lam.result": { "status": "OK" }
  }
}
else 
    { "lam.exit": true } 
end

Another Control Flow Example

JavaScript Version

(payload) => {
  const results = payload.step_1.response.results;
  
  if (results.length === 0) {
    return { "lam.exit": true };
  } else if (results.length === 1) {
    return { 
      "order_ids": [Number(results[0].order_id)]
    };
  } else {
    return { "lam.exit": true };
  }
}

JQ Version

.step_1.response.results | 
if length == 0 then 
  { "lam.exit": true } 
elif length == 1 then 
  .[0] | { "order_ids": [(.order_id | tonumber)] }
else 
  { "lam.exit": true } 
end

Laminar Keywords

Keywords allow workflows to be executed conditionally from within flows, making it easier to support complex control flow logic within custom integrations.