我定义了以下枚举和数据模型:
const enum Models {
Location = 'Location',
Person = 'Person',
Vehicle = 'Vehicle'
}
export interface Location {
name?: string,
city?: string,
state: string,
zip?: string,
}
export interface Person {
firstname: string,
lastname?: string,
}
export interface Vehicle {
model: string,
year?: string,
}
我的数据定义如下:
type ModelMap = {[key in Models]: Location | Person | Vehicle}
const data: ModelMap = {
[Models.Location]: { state: 'CA' },
[Models.Location]: { state: 'OR' },
[Models.Location]: { state: 'CO', firstname: 'blah' },
[Models.Person]: { firstname: 'John', lastname: 'Doe' },
[Models.Vehicle]: { model: 'Ford', year: '2018' },
}
这有效,但不对每个对象强制使用特定类型。相反,它强制执行三种类型的联合,即位置|人车辆。
是否可以强制执行特定的对象类型以匹配枚举索引键?如果是这样,怎么办?
例如,我希望第三个location对象无法进行类型检查,因为Location接口没有firstname变量。似乎我缺少枚举模型与各个接口之间的映射,但不确定。任何帮助表示赞赏。谢谢。
答案 0 :(得分:2)
我最终在接口和枚举之间创建了一个映射,如下所示:
type EnumInterfaceMap = { Location: Location; Person: Person; Vehicle: Vehicle };
type ModelMap = {[key in Models]: EnumInterfaceMap[key]}