了解MuleSoft流转换

Question

我是MuleSoft和Mule flow的新手。

我想连接fromairport和toairport列。结果应该在以下列中：

fromairport           toairport

MUA                        LAX

MUA                        CLE

MUA                        SFO

.....

我正在转换以下json：

    [
      {
        "planeType": "Boeing 787",
        "code2": "0001",
        "takeOffDate": "2016-01-20T00:00:00",
        "code1": "rree",
        "fromAirport": "MUA",
        "price": 541,
        "seatsAvailable": 0,
        "toAirport": "LAX",
        "ID": 1,
        "airlineName": "American Airlines",
        "totalSeats": 200
      },
      {
        "planeType": "Boeing 747",
        "code2": "0123",
        "takeOffDate": "2016-01-25T00:00:00",
        "code1": "eefd",
        "fromAirport": "MUA",
        "price": 300,
        "seatsAvailable": 7,
        "toAirport": "CLE",
        "ID": 2,
        "airlineName": "American Airlines",
        "totalSeats": 345
      },
      {
        "planeType": "Boeing 777",
        "code2": "0192",
        "takeOffDate": "2016-01-20T00:00:00",
        "code1": "ffee",
        "fromAirport": "MUA",
        "price": 300,
        "seatsAvailable": 0,
        "toAirport": "LAX",
        "ID": 3,
        "airlineName": "American Airlines",
        "totalSeats": 300
      }
    ]

Answer 1

我认为问题表达不正确。 DataWeave中没有“列”这样的概念。有对象，数组和属性。列的等效项是对象的属性数组。您可以在输入JSON中看到相同的概念，其中planeType，code2等是“列”。

我假设您不希望此输出不是JSON或XML格式，但是您希望对其进行进一步处理，因此与该输出的最佳匹配应该是application / java。

在Mule 4.x中，DataWeave脚本为：

%dw 2.0
output application/java
---
payload map (
    $.fromAirport ++ " to " ++ $.toAirport
)

更新：基于注释，我更新了脚本以返回字符串列表。每个字符串都是fromAirport属性，文字字符串“ to”和toAirport属性的串联。这两个属性均应为字符串。

输出：

["MUA to LAX", "MUA to CLE", "MUA to LAX"]