如何输入规范化状态树的分支？

Question

我有一个关于在 ngrx 库中输入规范化状态树的问题。例如：

const initialState: State = {
    dependencies: {
        1: {
            id: 1,
            name: "dependency1",
            type: "basic"
        },
        2: {
            id: 2,
            name: "dependency2",
            type: "complex"
        },
        3: {
            id: 3,
            name: "dependency3",
            type: "basic"
        }
    },
    dependencyIds: [1, 2, 3]
}

好的，那么我们可以在State接口中将dependencyIds声明为number[]，这样就很清楚了。 但问题是：有没有办法将 dependecies 键入为对象，在每个参数中都有一个 Dependency 对象？

像：

export interface State {
    dependencies: any,  <--- is there a {Dependency} instead of 'any' type, or sth?
    dependencyIds: number[]
}

Answer 1

是的，这是可能的。您可以使用 dependencies: { [key: number]: {...}

interface State {
    dependencies: { [key: number]: {
        id: number,
        name: string,
        type: "basic" | "complex"
    } }
    dependencyIds: number[]
}

或后续接口：

interface State {
    dependencies: { [key: number]: Dependency},
    dependencyIds: number[];
}

interface Dependency {
    id: number,
    name: string,
    type: "basic" | "complex"
}