[英]Mule dataweave extract elements from json array
我有以下json,并尝试提取phones数组的某些元素。 我并不总是得到2个元素,可能是1,2或3。
{
"phones": [{
"id": 123,
"phoneType": "H",
"phoneNumber": "2125551212",
"countryCode": "1",
"isCellPhone": false,
"optInTexting": false
}, {
"id": 456,
"phoneType": "W",
"phoneNumber": "9197776262",
"countryCode": "1",
"isCellPhone": true,
"optInTexting": true
}
]
}
这就是我的输出:
%output application/java
---
{
HOMEPH: payload.phones filter ($.phoneType == "H") map {HOMEPH:.phoneNumber},
WORKPH: payload.phones filter ($.phoneType == "W") map {WORKPH:$.phoneNumber}
}
我从中得到的结果是:
HOMEPH: [{HOMEPH=2125551212}]
WORKPH: [{WORKPH=9197776262}]
我想要的是:
HOMEPH: "2125551212",
WORKPH: "9197776262"
尝试以下方法
%output application/java
---
{
HOMEPH: (payload.phones filter ($.phoneType == "H") map ($.phoneNumber)) [0],
WORKPH: (payload.phones filter ($.phoneType == "W") map ($.phoneNumber)) [0]
}
要么
%output application/java
%var phoneLookup = {(payload.phones map {
($.phoneType) : $
})}
---
{
HOMEPH: phoneLookup["H"].phoneNumber,
WORKPH: phoneLookup["W"].phoneNumber
}
第二种选择效率更高,因为它会迭代一次有效负载。 希望这可以帮助。
由于您将输出用作application/java
,因此可以尝试以下操作:
%dw 1.0
%output application/java
---
{
(payload.phones filter ($.phoneType == "H") map {HOMEPH:$.phoneNumber}),
(payload.phones filter ($.phoneType == "W") map {WORKPH:$.phoneNumber})
}
如果在Dataweave之后将Object添加到字符串转换器,您将获得:
{HOMEPH=2125551212, WORKPH=9197776262}
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