用ReactJS和Python的Flask框架编写留言板的代码示例

var React = require("react");
var MessageList = require("./MessageList");
var MessageForm = require("./MessageForm");
var Pager = require("./Pager");

var MessageBoard = React.createClass({
 getInitialState : function(){
  return {
   messages: [],
   page:0,
   pages:0
  }
 },
 submitMessage : function (author, content) {
  $.ajax({
   type:'post',
   url:'/message',
   data:{author:author,content:content}
  }).done(function (data) {
   console.log(data);
   this.listMessage(1);
  }.bind(this));
 },
 listMessage : function(page){
  console.log("listMessages page:"+page)
  $.ajax({
   type:'get',
   url:'/messages',
   data:{page:page}
  }).done(function (resp) {
   if(resp.status == "success"){
    var pager = resp.pager;
    console.log(pager);
    this.setState({
     messages:pager.messages,
     page:pager.page,
     pages:pager.pages
    });
   }
  }.bind(this));
 },
 componentDidMount : function(){
  this.listMessage(1);
 },
 render : function(){
  var pager_props = {
   page : this.state.page,
   pages : this.state.pages,
   listMessage : this.listMessage
  };
  return(


<div>
    <MessageForm submitMessage={this.submitMessage}/>
    <MessageList messages = {this.state.messages}/>
    <Pager {...pager_props}/>
   </div>


  )
 }
});

module.exports = MessageBoard;

var React = require("react");

var MessageForm = React.createClass({
 handleSubmit : function (e) {
  e.preventDefault();
  var author = this.refs.author.getDOMNode().value.trim();
  var content = this.refs.content.getDOMNode().value.trim();

  this.props.submitMessage(author,content);

  this.refs.author.getDOMNode().value = "";
  this.refs.content.getDOMNode().value = ""
 },
 render : function(){
  return(
    <div className="well">
     <h4>Leave a Message:</h4>
     <div role="form">
      <div className="form-group">
       <input ref="author" className="form-control" placeholder="Name"/>
       <textarea ref="content" className="form-control" rows="3" placeholder="Leave your message here"></textarea>
      </div>
      <a className="btn btn-primary" onClick={this.handleSubmit}>Submit</a>
     </div>
    </div>
  )
 }
});
module.exports = MessageForm;

var React = require("react");

var Message = React.createClass({
 render : function(){
  var msg = this.props.message;
  return(


<div>
    <h3>{msg.author}  
     <small>{msg.time.toLocaleString()}</small>
    </h3>
    <p>{msg.content}</p>
   </div>


  )
 }
});

module.exports = Message;

var React = require("react");
var Message = require("./Message");

var MessageList = React.createClass({
 render : function () {
  var messages = this.props.messages.map(function(item){
   return <Message message={item}/>
  });
  console.log(messages);
  return(
   <div>
    {messages}
   </div>
  )
 }
});

module.exports = MessageList;

var React = require("react/addons");

var Pager = React.createClass({
 getDefaultProps : function(){
  return{
   page:0,
   pages:0
  }
 },
 clickHandler: function(e){
  e.preventDefault();
  console.log(e.target.dataset.page);
  console.log(e.target.dataset.page.value);
  this.props.listMessage(e.target.dataset.page);

 },
 render : function(){
  var cx = React.addons.classSet;
  var preClass = cx({
   'previous':true,
   'disabled':this.props.page == 1
  });
  var nextClass = cx({
   'next':true,
   'disabled':this.props.page == this.props.pages
  });

  return(
   <ul className="pager">
    <li className={preClass} onClick={this.clickHandler}>
     <a href="#" data-page={this.props.page-1}>←Prev</a>
    </li>
    <li>
     <span>{this.props.page}/{this.props.pages}</span>
    </li>
    <li className={nextClass} onClick={this.clickHandler}>
     <a href="#" data-page={this.props.page+1}>Next→</a>
    </li>
   </ul>
  )
 }
});

module.exports = Pager;