Cloud Firestore + React で、CRUDの例 #firebase #noSQL #React #node #javascript
■ 概要:
Cloud Firestore 関連となり。ReactでCRUDを作るメモです
・Firestore書き込み、firebase認証は。前と同様です
■ 環境
firebase
firebase Cloud Firestore
firebase.auth.GoogleAuthProvider
React
node 10.16
■ 前の、認証等の参考
https://note.com/knaka0209/n/nbed96c774175
■ 参考のコード
■ react実装
・firebase のkey設定は。下記
src/index.js
・Create
src/component/Task/Create.js
class Create extends Component {
constructor(props){
super(props)
this.state = {title: '', content: ''}
this.handleClick = this.handleClick.bind(this);
this.db = null
}
componentDidMount(){
this.database = firebase.firestore()
var self = this
firebase.auth().onAuthStateChanged(function(user) {
if (user) {
console.log("#Auth-OK");
} else {
alert("Error, auth error, please Google Login")
self.props.history.push("/task");
console.log('#no-User');
}
})
}
handleChangeTitle(e){
this.setState({title: e.target.value})
}
handleChangeContent(e){
this.setState({content: e.target.value})
}
add_item(){
var item = {
title: this.state.title,
content: this.state.content,
created_at: new Date(),
}
var self = this
if (this.newTodoName == "") { return; }
this.database.collection('tasks').add(item).then(function(docRef) {
console.log("Document written with ID: ", docRef.id)
self.props.history.push("/task");
}).catch(function(error) {
alert("Error save: "+ error)
console.error("Error adding document: ", error)
})
this.newTodoName = ""
}
handleClick(){
console.log("#-handleClick")
this.add_item()
// console.log( this.state )
}
render() {
return (
<div className="container">
<Link to="/task" className="btn btn-outline-primary mt-2">Back</Link>
<hr className="mt-2 mb-2" />
<h1 className="mt-2">Create - Task</h1>
<div className="row">
<div className="col-md-6">
<div className="form-group">
<label>Title:</label>
<input type="text" className="form-control"
onChange={this.handleChangeTitle.bind(this)}/>
</div>
</div>
</div>
<div className="row">
<div className="col-md-6">
<div className="form-group">
<label>Content:</label>
<input type="text" className="form-control"
onChange={this.handleChangeContent.bind(this)}/>
</div>
</div>
</div><br />
<div className="form-group">
<button className="btn btn-primary" onClick={this.handleClick}>Create
</button>
</div>
</div>
)
}
}
・index
src/component/Task/Index.js
class Index extends Component {
constructor(props) {
super(props);
this.state = {data: ''}
this.db = null
}
componentDidMount(){
this.get_items()
}
get_items(){
var items = []
var self = this
this.database = firebase.firestore()
var dbRef = this.database.collection('tasks')
dbRef = dbRef.orderBy("created_at", "desc")
dbRef.get().then(function(querySnapshot) {
querySnapshot.forEach(function(doc) {
/* console.log(doc.id, " => ", doc.data()) */
var item = doc.data()
items.push({
id : doc.id,
title : item.title,
content : item.content,
created_at : item.created_at
})
})
self.setState({ data: items })
console.log( items )
})
}
tabRow(){
if(this.state.data instanceof Array){
return this.state.data.map(function(object, i){
return <IndexRow obj={object} key={i} />
})
}
}
render(){
return (
<div className="container">
<h3>Task - index</h3>
<div className="row">
<div className="col-md-6">
<Link to="/task_create"
className="btn btn-sm btn-primary">+ Create
</Link>
</div>
<div className="col-md-6">
</div>
</div><br />
<table className="table table-hover">
<thead>
<tr>
<th>ID</th>
<th>Title</th>
<th>Conent</th>
<th>Actions</th>
</tr>
</thead>
<tbody>
{this.tabRow()}
</tbody>
</table>
</div>
)
}
}
・edit
src/component/Task/Edit.js
・Login
src/component/Users/Login.js
・Logout
src/component/Users/Logout.js
....
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