[英]Working with Firestore documents and collection data
我在 Firestore 中有一些具有以下集合结构的文档
_fl_meta_: Object { createdBy: "Kz5vTvzlmGhRCxqKuDhrvvANqPe2", docId: "76qlSYWItERvJVnLKSDt", env: "production", … }
author: "asd"
content: "last 1"
date: "2019-06-19T12:00:00-07:00"
id: "76qlSYWItERvJVnLKSDt"
imageDeck: Array [ {…} ]
order: 0
parentId: 0
status: "published"
summary: "last 1"
title: "last 1"
我试图遍历我的文档并将其收集数据呈现给我的组件,但我遇到了问题。
我的query
const db = firebase.firestore();
db
.collection('fl_content')
.where('_fl_meta_.schema', '==', 'blog')
.get()
.then(querySnapshot => {
querySnapshot.forEach(doc => {
console.log(doc.data());
// let results = Object.keys(doc.data()).map(function (key) {
// return [String(key), doc.data()[key]];
// })
// this.setState({ cards: results });
});
})
.catch(error => {
console.log("Error getting documents: ", error);
});
该查询从firestore
输出上述集合。 谢谢您的帮助
获取您的querySnapshot
并将其映射到包含您的文档的对象数组。
const querySnapshot = firebase.firestore().collection('fl_content')
.where('_fl_meta_.schema', '==', 'blog').get()
.then((querySnapshot) => {
// The following line will result in an array of objects (each object is your document data)
const yourDocuments = querySnapshot.docs.map((doc) => doc.data());
this.setState({cards: yourDocuments});
})
.catch((error) => {
console.log(error);
});
然后你可以做这样的事情:
// INSIDE YOUR RENDER METHOD
const cardItems = this.state.cards.map((item,index) =>
<CardComponent key={index}>
{item.name} // Here you can access and display the fields of your documents
</CardComponent>
);
return(
<SomeContainerComponent>
{cardItems}
</SomeContainerComponent>
);
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