Expressions

Expressions let you pass data between nodes using template syntax. They are resolved at runtime before each node executes.

Basic Syntax

Reference any node's result with double curly braces:

text
{{nodeId.result.fieldName}}

{{trigger.result.amount}}

{{action-1.result.price}}

{{action-2.result.data.items[0]}}

Special Variables

Access workflow-scoped and organization-scoped persistent storage:

{{$storage.key}}

{{$org.storage.key}}

{{$org.stores.storeName.key}}

Access template parameters (when workflow is used as a template):

text
{{$props.key}}

Inside a for-each node's loop body:

{{$item}}

{{$index}}

For nested for-each nodes, access parent loop variables:

{{$parent_item}}

{{$for.nodeId.item}}
{{$for.nodeId.index}}

Type Preservation

Condition DSL

The if action uses a condition DSL that supports MongoDB-style operators:

json
{
  "condition": {
    "$gt": ["{{action-1.result.price}}", 100]
  }
}

Supported operators:

Filter DSL

The filter action uses the same DSL to filter arrays:

json
{
  "array": "{{action-1.result.items}}",
  "filter": {
    "$gt": ["{{@price}}", 100]
  }
}