React + Backbone 嵌套组件
React + Backbone nested components
我最近开始将 reactjs 与 backbone 一起使用。我搜索并找到 Dan Abramov's answer here。在我开始使用嵌套组件之前,我一直在成功地使用他的 mixin。
假设我有一个 user
模型如下
{
id: 1,
name: "John Doe",
email: "john@doe.com"
}
连同 users
合集
我的react代码如下
var EditableContent = React.createClass({
getInitialState: function() {
return {
editing: false,
value: this.props.value,
temp: this.props.value
};
},
editValue: function() {
this.setState({editing: true})
},
valueChanged: function() {
var newVal = this.refs.text.getDOMNode().value;
this.setState({temp: newVal});
},
valueUpdated: function() {
var oldVal = this.state.value,
newVal = this.refs.text.getDOMNode().value;
this.setState({
value: newVal,
editing: false
});
if (this.props.onUpdate) this.props.onUpdate(newVal, oldVal);
},
abortEdit: function() {
var oldVal = this.state.value;
this.setState({
value: oldVal,
temp: oldVal,
editing: false
});
},
render: function() {
if (this.state.editing) {
return(
<span className={"form-inline"}>
<input type="text" className="form-control" ref="text" value={this.state.temp} onChange={this.valueChanged} />
<button className={"btn btn-success"} onClick={this.valueUpdated}>
<i className={"fa fa-check"}></i>
</button>
<button className={"btn btn-danger"} onClick={this.abortEdit}>
<i className={"fa fa-close"}></i>
</button>
</span>
);
} else {
return (
<span>{this.state.value}
<button className={"btn btn-warning"} onClick={this.editValue}>
<i className={"fa fa-pencil"}></i>
</button>
</span>
);
}
}
});
var UserRow = React.createClass({
mixins: [BackboneMixin],
getBackboneState: function(props) {
return {
user: props.user.toJSON()
};
},
watchBackboneProps:function(props, listenTo){
listenTo(props.user, 'change');
},
emailUpdate:function(email) {
this.props.user.set('email', email, {silent:true});
},
render: function() {
return (
<tr>
<td>{this.state.user.name}</td>
<td><EditableContent value={this.state.user.email} onUpdate={this.emailUpdate}/></td>
</tr>
);
}
});
var UserTable = React.createClass({
mixins: [BackboneMixin],
getBackboneState: function(props) {
return {
users: props.users.toJSON()
};
},
watchBackboneProps:function(props, listenTo) {
listenTo(props.users, 'add remove change reset');
},
componentDidMount: function() {
/**$.get('/api/users.php'), function(data){
this.props.users.add(data);
}.bind(this));**/
this.props.users.add([
{
"id": 1,
"name": "Idona Reese",
"email": "vehicula.risus@semperpretiumneque.org"
},{
"id": 2,
"name": "Norman Santana",
"email": "ut.mi.Duis@Cumsociisnatoque.edu"
},{
"id": 3,
"name": "Colt Fulton",
"email": "mauris.id@ultrices.edu"
}
]);
},
render: function() {
return (
<table className={"table"}>
<thead>
<tr>
<th>Username</th>
<th>Email</th>
</tr>
</thead>
<tbody>
{this.state.users.map(function(elem){
return <UserRow key={elem.id} user={this.props.users.get(elem.id)} />
}, this)}
</tbody>
</table>
)
}
});
React.render(<UserTable users={users} />, document.getElementById('main'))
我不断收到 Uncaught Error: Listener already exists.
我已经得出结论,这是由于嵌套组件,因为当我从 UserRow
中删除混入并改用 getInitialState
时,一切正常。
从视图到模型的数据正确更新,但反之则不然。任何帮助将不胜感激。
提前致谢!
问题出在您的代码中 !
。我不确定它是从哪里来的,因为我没有在 mixin 中。
原代码:
_unbindBackboneEvents: function () {
if (!_.isFunction(this.watchBackboneProps)) {
return;
}
来自您的 fiddle 的代码:
_unbindBackboneEvents: function() {
if (!!_.isFunction(this.watchBackboneProps)) {
return;
}
如果您将 !!
固定为 !
,它会起作用。
我最近开始将 reactjs 与 backbone 一起使用。我搜索并找到 Dan Abramov's answer here。在我开始使用嵌套组件之前,我一直在成功地使用他的 mixin。
假设我有一个 user
模型如下
{
id: 1,
name: "John Doe",
email: "john@doe.com"
}
连同 users
合集
我的react代码如下
var EditableContent = React.createClass({
getInitialState: function() {
return {
editing: false,
value: this.props.value,
temp: this.props.value
};
},
editValue: function() {
this.setState({editing: true})
},
valueChanged: function() {
var newVal = this.refs.text.getDOMNode().value;
this.setState({temp: newVal});
},
valueUpdated: function() {
var oldVal = this.state.value,
newVal = this.refs.text.getDOMNode().value;
this.setState({
value: newVal,
editing: false
});
if (this.props.onUpdate) this.props.onUpdate(newVal, oldVal);
},
abortEdit: function() {
var oldVal = this.state.value;
this.setState({
value: oldVal,
temp: oldVal,
editing: false
});
},
render: function() {
if (this.state.editing) {
return(
<span className={"form-inline"}>
<input type="text" className="form-control" ref="text" value={this.state.temp} onChange={this.valueChanged} />
<button className={"btn btn-success"} onClick={this.valueUpdated}>
<i className={"fa fa-check"}></i>
</button>
<button className={"btn btn-danger"} onClick={this.abortEdit}>
<i className={"fa fa-close"}></i>
</button>
</span>
);
} else {
return (
<span>{this.state.value}
<button className={"btn btn-warning"} onClick={this.editValue}>
<i className={"fa fa-pencil"}></i>
</button>
</span>
);
}
}
});
var UserRow = React.createClass({
mixins: [BackboneMixin],
getBackboneState: function(props) {
return {
user: props.user.toJSON()
};
},
watchBackboneProps:function(props, listenTo){
listenTo(props.user, 'change');
},
emailUpdate:function(email) {
this.props.user.set('email', email, {silent:true});
},
render: function() {
return (
<tr>
<td>{this.state.user.name}</td>
<td><EditableContent value={this.state.user.email} onUpdate={this.emailUpdate}/></td>
</tr>
);
}
});
var UserTable = React.createClass({
mixins: [BackboneMixin],
getBackboneState: function(props) {
return {
users: props.users.toJSON()
};
},
watchBackboneProps:function(props, listenTo) {
listenTo(props.users, 'add remove change reset');
},
componentDidMount: function() {
/**$.get('/api/users.php'), function(data){
this.props.users.add(data);
}.bind(this));**/
this.props.users.add([
{
"id": 1,
"name": "Idona Reese",
"email": "vehicula.risus@semperpretiumneque.org"
},{
"id": 2,
"name": "Norman Santana",
"email": "ut.mi.Duis@Cumsociisnatoque.edu"
},{
"id": 3,
"name": "Colt Fulton",
"email": "mauris.id@ultrices.edu"
}
]);
},
render: function() {
return (
<table className={"table"}>
<thead>
<tr>
<th>Username</th>
<th>Email</th>
</tr>
</thead>
<tbody>
{this.state.users.map(function(elem){
return <UserRow key={elem.id} user={this.props.users.get(elem.id)} />
}, this)}
</tbody>
</table>
)
}
});
React.render(<UserTable users={users} />, document.getElementById('main'))
我不断收到 Uncaught Error: Listener already exists.
我已经得出结论,这是由于嵌套组件,因为当我从 UserRow
中删除混入并改用 getInitialState
时,一切正常。
从视图到模型的数据正确更新,但反之则不然。任何帮助将不胜感激。
提前致谢!
问题出在您的代码中 !
。我不确定它是从哪里来的,因为我没有在 mixin 中。
原代码:
_unbindBackboneEvents: function () {
if (!_.isFunction(this.watchBackboneProps)) {
return;
}
来自您的 fiddle 的代码:
_unbindBackboneEvents: function() {
if (!!_.isFunction(this.watchBackboneProps)) {
return;
}
如果您将 !!
固定为 !
,它会起作用。