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/ 9 Years ago, mon, january 18, 2016, 12:00:00
I know there are a few similar questions here and here but I am having a tough time understanding what is the correct thinking today on this and extrapolating it to my situation.
I have a simple app, ScoreBox has a ScoreList which has many Scores. I want to have a Score onClick call ScoreList handleScoreRemove. I am showing the full js file, but the most important lines are line 5 and line 77.
var Score = React.createClass({
removeRecord: function(e){
// How do I do this?
ScoreList.handleScoreRemove(e);
},
render: function() {
var team1_style = (this.props.team1_score >= this.props.team2_score) ?
{fontWeight: 'bold'} : {};
var team2_style = (this.props.team2_score >= this.props.team1_score) ?
{fontWeight: 'bold'} : {};
return (
<tr>
<td style={team1_style}>{this.props.team1_name}:</td><td style={team1_style}>{this.props.team1_score}</td>
<td style={team2_style}>{this.props.team2_name}:</td><td style={team2_style}>{this.props.team2_score}</td>
<td><a hef=# id={this.props.id} onClick={this.removeRecord}>remove</a></td>
</tr>
);
}
});
var ScoreBox = React.createClass({
loadScoresFromServer: function() {
$.ajax({
url: this.props.url,
dataType: 'json',
cache: false,
success: function(data) {
this.setState({data: data});
}.bind(this),
error: function(xhr, status, err) {
console.error(this.props.url, status, err.toString());
}.bind(this)
});
},
handleScoreSubmit: function(score) {
var scores = this.state.data;
// Optimistically set an id on the new score. It will be replaced by an
// id generated by the server. In a production application you would likely
// not use Date.now() for this and would have a more robust system in place.
score.id = Date.now();
var newScores = scores.concat([score]);
this.setState({data: newScores});
$.ajax({
url: this.props.url,
dataType: 'json',
type: 'POST',
data: score,
success: function(data) {
this.setState({data: data});
}.bind(this),
error: function(xhr, status, err) {
this.setState({data: scores});
console.error(this.props.url, status, err.toString());
}.bind(this)
});
},
getInitialState: function() {
return {data: []};
},
componentDidMount: function() {
this.loadScoresFromServer();
setInterval(this.loadScoresFromServer, this.props.pollInterval);
},
render: function() {
return (
<div className=scoreBox>
<h1>Scores</h1>
<ScoreList data={this.state.data} />
<ScoreForm onScoreSubmit={this.handleScoreSubmit} />
</div>
);
}
});
var ScoreList = React.createClass({
handleScoreRemove: function(score) {
var scores = this.state.data;
var index_of_score = array.indexOf(score);
var newScores = scores.splice(index_of_score, 1);
this.setState({data: newScores});
$.ajax({
url: this.props.url + / + score[id],
dataType: 'json',
type: 'DELETE',
success: function(data) {
this.setState({data: data});
}.bind(this),
error: function(xhr, status, err) {
this.setState({data: scores});
console.error(this.props.url, status, err.toString());
}.bind(this)
});
},
render: function() {
var scoreNodes = this.props.data.map(function(score) {
return (
<Score key={score.id} id={score.id} team1_name={score.team1_name} team1_score={score.team1_score} team2_name={score.team2_name} team2_score={score.team2_score} >
</Score>
);
});
return (
<div className=scoreList>
<table>
<tbody>
{scoreNodes}
</tbody>
</table>
</div>
);
}
});
var ScoreForm = React.createClass({
checkForCompleteForm: function(){
if (this.state.team1_name.length > 0 && this.state.team2_name.length > 0 && this.state.team1_score.length > 0 && this.state.team2_score.length > 0)
{
// enable the button
$(input[type=submit]).removeAttr('disabled');
}
},
getInitialState: function() {
return {id: '', team1_name: '', team1_score: '', team2_name: '', team2_score: ''};
},
handleChange : function (e) {
// this is a generic handle change function that uses the html id to set the state instead of
// having a bunch of if statements
var stateObject = function() {
var returnObj = {};
returnObj[this.target.id] = this.target.value;
return returnObj;
}.bind(e)();
// setState is async which makes this painful
// JCN - why when I pass checkForCompleteForm as 2nd param it doesnt work, but instead I need this
// function bind stuff... need to understand exactly what this is doing
this.setState( stateObject, function(){
this.checkForCompleteForm();
}.bind(this));
},
handleSubmit: function(e) {
e.preventDefault();
var team1_name = this.state.team1_name.trim();
var team1_score = this.state.team1_score.trim();
var team2_name = this.state.team2_name.trim();
var team2_score = this.state.team2_score.trim();
if (!team1_name || !team1_score ) {
return;
}
this.props.onScoreSubmit({team1_name: team1_name, team1_score: team1_score,team2_name: team2_name, team2_score: team2_score });
this.setState({team1_name: '', team1_score: '', team2_name: '', team2_score: ''});
},
render: function() {
return (
<form className=scoreForm onSubmit={this.handleSubmit}>
<input
id='team1_name'
type=text
placeholder=Team1 Name
value={this.state.team1_name}
onChange={this.handleChange}
/>
<input
id='team1_score'
type=number
placeholder=Team1 Score
value={this.state.team1_score}
onChange={this.handleChange}
/>
<input
id='team2_name'
type=text
placeholder=Team2 Name
value={this.state.team2_name}
onChange={this.handleChange}
/>
<input
id='team2_score'
type=number
placeholder=Team2 Score
value={this.state.team2_score}
onChange={this.handleChange}
/>
<input type=submit value=Post disabled />
</form>
);
}
});
ReactDOM.render(
<ScoreBox url=/api/scores pollInterval={2000} />,
document.getElementById('content')
);
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