类型“DocumentData”不可分配给类型“IProduct”

Question

我刚刚开始使用打字稿，我希望你能帮助我，我不知道如何解决这个错误

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接口

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export interface IProduct {\n  name: string;\n  price: number[];\n    stock: number;\n    createdAt: firestore.Timestamp\n}\n\nexport interface IDataProduct {\n    [key: string]: IProduct\n}\n

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从 firestore 获取 ProductList

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export const fetchProducts = () => \n    async (dispatch: Dispatch, getState: () => any, { db }: IServices) => {        \n        try {\n            const snaps = await db.collection(\'productos\').get()\n\n            let products: IDataProduct = {}\n            snaps.forEach(x => {\n             return products[x.id] = x.data()\n            })\n\n            dispatch(fetchSucess(products))\n    } catch (error) { dispatch(fetchError(error)) }\n}\n

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错误\n “类型\'DocumentData\'无法分配给类型\'IProduct\'。\n类型\'DocumentData\'缺少类型\'IProduct\'中的以下属性：name、precio、stock、createdAt ” \在这里return products[x.id] = x.data()

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x返回

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{\nid: "IgzlwT6OlazrlBTmAIj4"\nref: (...)\nexists: (...)\nmetadata: t\nim: t {xT: FirebaseAppImpl, BT: t, INTERNAL: {\xe2\x80\xa6}, OT: t, WT: "[DEFAULT]", \xe2\x80\xa6}\nem: t {path: n}\nlm: n {key: t, version: t, Ee: t, te: false, hasCommittedMutations: false}\ndm: false\nfm: false\nom: undefined\n__proto__: t\n}\n

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和x.data()返回

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{\nstock: 64\nname: "ProductName 50Kg"\nprice: (3) [24, 23, 20]\ncreatedAt: t {seconds: 1587099600, nanoseconds: 0}\n}\n

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我无法解决这个问题

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Answer 1

如果您想假设x.data()返回一个完全符合接口的对象IProduct，则必须对其进行强制转换：

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