我有一个名为ProfileSettingsContainer
的TrackerReact容器,它将Meteor.user()
返回给user()
函数并将其传递给ProfileSettings
组件。我的最终目标是为用户的个人资料创建“设置”页面,用户可以在其中更改其头像并更新其他信息。这是我的代码。
profile_settings_container.js
import React, { Component } from 'react';
import TrackerReact from 'meteor/ultimatejs:tracker-react';
import ProfileSettings from './profile_settings';
export default class ProfileSettingsContainer extends TrackerReact(Component) {
user(){
return Meteor.user();
}
render() {
let user = this.user;
return (
<ProfileSettings user={user} />
);
}
}
profile_settings.js
import React, { Component } from 'react';
import { Link } from 'react-router';
export default class ProfileSettings extends Component {
constructor(props) {
super(props);
this.state = {
avatar: props.user.profile.avatar || "../../../public/user-default.svg"
}
}
componentWillMount(){
// we create this rule both on client and server
Slingshot.fileRestrictions("avatar", {
allowedFileTypes: ["image/png", "image/jpeg", "image/gif"],
maxSize: 2 * 500 * 500
});
}
upload(){
var userId = Meteor.user()._id;
var metaContext = {avatarId: userId};
var uploader = new Slingshot.Upload("UsersAvatar", metaContext);
uploader.send(document.getElementById('input').files[0], function (error, downloadUrl) { // you can use refs if you like
if (error) {
console.error('Error uploading', uploader.xhr.response);
alert (error);
}
else {
Meteor.users.update(Meteor.userId(), {$set: {"profile.avatar": downloadUrl}});
}
this.setState({avatar: downloadUrl});
}.bind(this));
}
formSubmit(){
let avatarUrl = this.state.avatar;
Meteor.users.update( {_id: Meteor.userId() }, {
$set: {'profile.avatar': avatarUrl}
});
}
render() {
return (
<div>
<div className="sticky-header">
<h3>Settings</h3>
</div>
<form>
<div className="row well">
<div className="col-md-6">
<div className="form-group">
<label htmlFor="exampleInputFile">File input</label>
<input type="file" id="input" onChange={this.upload.bind(this)} />
<p className="help-block">Image max restriction: 2MB, 500x500. Cropped: 200x200</p>
</div>
</div>
<div className="col-md-6 utar-r">
<img src={this.state.avatar} height="200" width="200" alt="..." className="img-rounded" />
</div>
<div className="form-group">
<button className="btn btn-lg btn-primary btn-block" type="submit" onClick={this.formSubmit.bind(this)}>Update Profile</button>
</div>
</div>
</form>
<footer className="sticky-footer">
<Link to="/app/profile">
<button className="profile-edit bg-black">
<h3>Cancel</h3>
</button>
</Link>
<Link to="">
<button className="profile-edit">
<h3>Save Changes</h3>
</button>
</Link>
</footer>
</div>
);
}
}
以下是加载设置页面时出现的控制台错误:profile_settings.js:11Uncaught TypeError: Cannot read property 'avatar' of undefined
除此之外,我已经检查过RoboMongo并且可以确认user.profile.avatar存在。我在Accounts.createUser()
组件的signup
函数中指定了默认图像“/user-default.svg”。
答案 0 :(得分:0)
用户尚未加载(已定义),因此只需添加类似if (user) return(<ProfileSettings user={user}/>) else return ""