删除 scala 中的 JSON 数组元素

Question

我有一个这样的JSON结果：

[
    {
        "id": 2202,
        "name": "name one",
        "phone": "[phone]",
        "email": "[e-mail]",
        "corporateId": null,
        "corporateName": null,
        "version": 119,
        "signupDate": "2016-01-28T00:00:00+07:00"
    },
    {
        "id": 2580,
        "name": "name two",
        "phone": "[phone]",
        "email": "[e-mail]",
        "corporateId": null,
        "corporateName": null,
        "version": 119,
        "signupDate": "2016-01-28T00:00:00+07:00"
    }
]

如何删除一些元素，以便我有这样的新 JSON 结果（删除corporateId和corporateName）：

[
    {
        "id": 2202,
        "name": "name one",
        "phone": "[phone]",
        "email": "[e-mail]",
        "version": 119,
        "signupDate": "2016-01-28T00:00:00+07:00"
    },
    {
        "id": 2580,
        "name": "name two",
        "phone": "[phone]",
        "email": "[e-mail]",
        "version": 119,
        "signupDate": "2016-01-28T00:00:00+07:00"
    }
]

Answer 1

有一些方法。其中一个是JSON转换器。

要删除corporateId和corporateName用例 6：从输入 JSON 中修剪分支：

(__  "corporateId").json.prune andThen (__  "corporateName").json.prune

要删除每个 JsArray 元素，请使用 Reads.list ：

Reads.list(
  (__  "corporateId").json.prune andThen (__  "corporateName").json.prune
)

适合您的复杂变压器将是：

json.transform(
  Reads.list(
    (__  "corporateId").json.prune andThen (__  "corporateName").json.prune
  ).map(JsArray)
)
res3: play.api.libs.json.JsResult[play.api.libs.json.JsArray] = JsSuccess([{"id":2202,"name":"name one","phone":"[phone]","email":"[e-mail]","version":119,"signupDate":"2016-01-28T00:00:00+07:00"},{"id":2580,"name":"name two","phone":"[phone]","email":"[e-mail]","version":119,"signupDate":"2016-01-28T00:00:00+07:00"}],)