Question

我刚刚开始使用打字稿，希望您能为我提供帮助，我不知道如何解决此错误

接口

export interface IProduct {
  name: string;
  price: number[];
    stock: number;
    createdAt: firestore.Timestamp
}

export interface IDataProduct {
    [key: string]: IProduct
}

从Firestore获取产品列表

export const fetchProducts = () => 
    async (dispatch: Dispatch, getState: () => any, { db }: IServices) => {        
        try {
            const snaps = await db.collection('productos').get()

            let products: IDataProduct = {}
            snaps.forEach(x => {
             return products[x.id] = x.data()
            })

            dispatch(fetchSucess(products))
    } catch (error) { dispatch(fetchError(error)) }
}

错误 ” 不能将“ DocumentData”类型分配给“ IProduct”类型。类型'DocumentData'缺少类型'IProduct'中的以下属性：名称，名称，库存，createdAt “ 在这里return products[x.id] = x.data()

x 返回

{
id: "IgzlwT6OlazrlBTmAIj4"
ref: (...)
exists: (...)
metadata: t
im: t {xT: FirebaseAppImpl, BT: t, INTERNAL: {…}, OT: t, WT: "[DEFAULT]", …}
em: t {path: n}
lm: n {key: t, version: t, Ee: t, te: false, hasCommittedMutations: false}
dm: false
fm: false
om: undefined
__proto__: t
}

和 x.data（）返回

{
stock: 64
name: "ProductName 50Kg"
price: (3) [24, 23, 20]
createdAt: t {seconds: 1587099600, nanoseconds: 0}
}

我无法解决

Answer 1

如果您要假设x.data()返回一个完全符合IProduct接口的对象，则必须将其强制转换：

products[x.id] = x.data() as IProduct

无法将“ DocumentData”类型分配给“ IProduct”类型

1 个答案: