Map Node
Map Nodes
Map Nodes allow you to easily run the same Subworkflow multiple times in a row or in parallel, with up to 96 concurrent executions.
Map Nodes take a JSON array as an input and run the same Subworkflow for each item in the array. The Subworkflow is provided with three input variables on each iteration: item (the value in the current iteration of the array), items (the entire array), and index (the position of the current iteration, as a number).
The output of every Subworkflow is then combined into a single value as the output of the Map Node, with the special Vellum type ARRAY (not JSON).
Tip: Map Node Inputs
If you don’t see your input as an option when setting the items input of the Map Node — make sure that the Node you’re using as an input has its output type as JSON and not ARRAY. ARRAY types are special Vellum types and won’t be recognized as inputs to Map Nodes.