如何從Typescript中的枚舉分配字符串類型？

Question

所以我有一個包含一組字符串的枚舉

export enum apiErrors {
    INVALID_SHAPE = "INVALID_SHAPE",
    NOT_FOUND = "NOT_FOUND",
    EXISTS = "EXISTS",
    INVALID_AUTH = "INVALID_AUTH",
    INTERNAL_SERVER_ERROR = "INTERNAL_SERVER_ERROR"
}

我定義了如下界面

export interface IApiResponse {
    status: boolean;
    payload: any;
    errorCode?: string; // I want this to be "INVALID_SHAPE" | "NOT_FOUND" and so on...
}

我知道我可以像"INVALID_SHAPE" | "NOT_FOUND" ...一樣定義"INVALID_SHAPE" | "NOT_FOUND" ... "INVALID_SHAPE" | "NOT_FOUND" ...

但是，是否有一種方法可以將枚舉結構分解為errorCode ，使其只能接受這些字符串之一？

Answer 1

如@JBNizet和@AviadP所述，只需將errorCode設置為apiErrors枚舉即可。 Typescript將自動確保實現IApiResponse接口的所有內容都將errorCode設置為這些值之一。

export enum apiErrors {
   INVALID_SHAPE = "INVALID_SHAPE",
   NOT_FOUND = "NOT_FOUND",
   EXISTS = "EXISTS",
   INVALID_AUTH = "INVALID_AUTH",
   INTERNAL_SERVER_ERROR = "INTERNAL_SERVER_ERROR"
}

export interface IApiResponse {
   status: boolean;
   payload: any;
   errorCode?: apiErrors // this is the change
}

// this would now be invalid
const invalidResponse: IApiResponse = {
   status: false,
   payload: {foo: 'bar'},
   errorCode: 'something not in the enum',
};

// this is valid
const validResponse: IApiResponse = {
   status: false,
   payload: {foo: 'bar'},
   errorCode: apiErrors.INVALID_SHAPE,
};

// this is also valid
const anotherValidResponse: IApiResponse = {
   status: true,
   payload: {foo: 'bar'},
   // errorCode isn't included at all
};