nodeExists

DataWeave 2.2 is compatible and bundled with Mule 4.2. Standard Support for Mule 4.2 ended on May 2, 2021, and this version of Mule will reach its End of Life on May 2, 2023, when Extended Support ends.

Deployments of new applications to CloudHub that use this version of Mule are no longer allowed. Only in-place updates to applications are permitted.

MuleSoft recommends that you upgrade to the latest version of Mule 4 that is in Standard Support so that your applications run with the latest fixes and security enhancements.

nodeExists(Any, (value: Any, path: Path) -> Boolean): Boolean

Returns true if any node in the tree validates against the specified criteria.

Parameters

Name Description

value

The value to search.

callback

The criteria.

Example

This example checks for any user with the name peter.

Source

%dw 2.0
output application/json
---
* %dw 2.0
 import * from dw::util::Tree
  output application/json
  ---
 {
     user: [{
         name: "mariano",
         lastName: "achaval",
         friends: [
             {
                 name: "julian"
             },
             {
                 name: "tom"
             }
         ]
     },
     {
         name: "leandro",
         lastName: "shokida",
         friends: [
             {
                 name: "peter"
             },
             {
                 name: "robert"
             }
         ]

     }
     ],

 } nodeExists ((value, path) -> path[-1].selector == "name" and value == "peter")

Output

true

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