Pass variables between Workflows

You can pass variables between Workflows. This is useful if you want to use a previously created variable within the scope of a single Workflow. For example:

• You want to collect user information in one Workflow, then validate it in a sub-Workflow.
• You have a Workflow that stores items in a virtual shopping cart, and you want to process payment for those items in a sub-Workflow.
• You have some condition in one Workflow, and you want a sub-Workflow to behave differently based on that condition.

From a parent Workflow to a sub-Workflow

1. Setup your input variable

   1. In your sub-Workflow (the one you want to pass the variable to), create a new Workflow variable.

   You can pass any kind of variable from your parent Workflow, but your sub-Workflow needs to treat it as a Workflow variable.

   2. Select your sub-Workflow’s Entry Node.
   3. Under Toggle Variables, select the variable you just created:

   This tells the parent Workflow that your sub-Workflow is expecting some input.

2. Pass the variable to the sub-Workflow

   In your parent Workflow, select the Card that transitions to the sub-Workflow. It should display the input variable you just created:

   You can manually enter a value to pass to the sub-Workflow, or use a previously created variable from your parent Workflow.

   Now, whatever value you pass from your parent Workflow will be available in your sub-Workflow as a Workflow variable.

From a sub-Workflow to a parent Workflow

1. Pass your output variable

   1. Select your sub-Workflow’s Exit Node.
   2. Under Toggle Variables, select the variable you want to pass:

   This tells the parent Workflow to expect some output from the sub-Workflow.

   You can only pass Workflow variables from a sub-Workflow to a parent Workflow.

2. Configure the sub-Workflow Card

   1. In the parent Workflow, select the Card that transitions to the sub-Workflow:

   2. Make sure the Exit Nodes option is selected.
3. Read the output variable in the parent Workflow

   To access the sub-Workflow’s output variable from within the parent Workflow, read:

   workflow.<cardName>.<variableName>

   Your parent Workflow now has access to its sub-Workflow’s variable.