Angular2 - 如何将 Rails json 错误响应解构为字符串

Question

来自 Rails API 的错误响应给了我这个 json 正文：

{"mobile":["is already taken"],"email":["is already taken"]}

如您所见，每个字段都可以有一组与之关联的错误消息。

我正在尝试 'deconstruct' 将它变成一个简单的字符串：

"mobile is already taken, email is already taken"

我正在尝试使用地图并为其提供一个函数。显然我需要考虑这些数组中可能有多个元素的事实，例如：

{"mobile":["is already taken","must start 07 for UK"],"email":["is already taken"]}

然后应该变成：

"mobile is already taken, mobile must start 07 for UK, email is already taken"

Answer 1

可以这样做：

let a = JSON.parse('{"mobile":["is already taken","must start 07 for UK"],"email":["is already taken"]}');
let message = Object.keys(a).reduce((prev, next) => prev.concat(a[next].map(v => next + ' ' + v).join(', ')), []).join(', ');

Answer 2

手头没有任何实际的努力，或者至少没有提供代码，感觉就像在做别人的功课。另一方面，这些是我喜欢的有趣的东西。不需要地图或其他任何东西。只是普通的 TypeScript：

let errorMessages: string[] = [];

let json: string = {"mobile":["is already taken","must start 07 for UK"],"email":["is already taken"]};

let keys: string[] = Object.keys(json);

for(let key of keys) {
   for(let msg of json[key]) {
       errorMessages.push(key + ' ' + msg);
   }
}

console.log(errorMessages.join(', '));

Angular2 - 如何将 Rails json 错误响应解构为字符串

Angular2 - how to destructure a Rails json error response into a string

json

dictionary

rails-api

angular