从 Mule Dataweave 过滤 Json 数组

Question

我的请求 Json 如下所示。 我想检索所有将角色作为测试的 productNumber。

{
   "productRelation": [
      {
         "productNumber": 12345,
         "roles": [
            {
               "role": {
                  "code": "test",
                  "description": "test"
               }
            }
         ]
      },
      {
         "productNumber": 789,
         "roles": [
            {
               "role": {
                  "code": "dev",
                  "description": "dev"
               }
            }
         ]
      },
      {
         "productNumber": 111,
         "roles": [
            {
               "role": {
                  "code": "prod",
                  "description": "prod"
               }
            }
         ]
      }
   ]
}

我尝试使用 dataweave 过滤器将其过滤掉。 我使用 mule 4 和 dataweave 2.0

Answer 1

使用过滤器：

%dw 2.0
output application/json
---
payload.productRelation 
    filter ((item, index) -> item.roles..code contains "test") 
    map ((item, index) -> item.productNumber)

Answer 2

尝试这个：

%dw 2.0
output application/json
---
payload.productRelation reduce (e, acc=[]) -> (
    do {
        // Get the roles for the productNumber]
        var roles = e.roles..*code
        ---
        // if the roles contain test add the productNumber to the result
        if (roles contains "test") (acc + e.productNumber) else acc
    }
)