Alex Beyer Alex Beyer - 2 months ago 9
HTML Question

React data pull not working

I am new to react and trying to build a table component that changes based on what is passed in for headers and rows.

I have been following the fb react tutorials and I have hit a road block I have looked on here and did some changes but nothing is working.

Here is my HTML page that gets the generated content.

<!DOCTYPE html>
<html lang="en-us">
<head>
<meta charset='utf-8'>
<meta http-equiv="X-UA-Compatible" content="IE=10; IE=9; IE=8; IE=7; IE=EDGE" />
<meta name="viewport" content="width=device-width, initial-scale=1">

<!-- CSS -->
<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/bootstrap-datepicker/1.4.1/css/bootstrap-datepicker3.css"/>
<link rel="stylesheet" type="text/css" href="/vendor/twbs/bootstrap/dist/css/bootstrap.min.css">
<link rel="stylesheet" type="text/css" href="/vendor/etdsolutions/sweetalert/sweetalert.css?<?= assetCacheQueryStr() ?>" />
<link rel="stylesheet" type="text/css" href="/lib/jquery-ui-1.11.4/jquery-ui.css">
<link rel="stylesheet" type="text/css" media="screen" href="https://cdnjs.cloudflare.com/ajax/libs/bootstrap-select/1.9.3/css/bootstrap-select.min.css">

<!-- Javascript -->
<script src="https://unpkg.com/react@15.3.2/dist/react.js"></script>
<script src="https://unpkg.com/react-dom@15.3.2/dist/react-dom.js"></script>
<script src="https://unpkg.com/babel-core@5.8.38/browser.min.js"></script>
<script src="https://unpkg.com/jquery@3.1.0/dist/jquery.min.js"></script>
<script src="https://unpkg.com/remarkable@1.6.2/dist/remarkable.min.js"></script>
<script src="/vendor/etdsolutions/sweetalert/sweetalert.min.js?<?= assetCacheQueryStr()?>"></script>
<script src="/vendor/twbs/bootstrap/dist/js/bootstrap.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/bootstrap-select/1.9.3/js/bootstrap-select.min.js"></script>
<script src="/lib/sorttable.js"></script>
<script type="text/javascript" src="https://cdnjs.cloudflare.com/ajax/libs/bootstrap-datepicker/1.4.1/js/bootstrap-datepicker.min.js"></script>

<title>React</title>
</head>
<body>
<div id="loadboardContainer"></div>

<!-- Import the table react setup. -->
<script type="text/babel" src="test.js"></script>
</body>
</html>


Now I have the external react script in the test.js file which is this.

var Table = React.createClass({
getInitialState: function() {
return {
results: [],
columns: []
}
},
componentDidMount: function() {
this.serverRequest = $.get(this.props.source, function(result) {
result = JSON.parse(result);
this.setState({
results: result['resultRows'],
columns: $.makeArray(result['resultCols'])
});
}.bind(this));
},
componentWillUnmount: function(){
this.serverRequest.abort();
},
render: function() {
// Set array for rows.
var rows = [];
var header = [];

this.state.columns.map(function(cols) {
header.push(<TableColumns data={cols.cols} key={cols.id} />);
});

this.state.results.map(function(result) {
rows.push(<TableRow data={result.rows} key={result.id} />);
});

// Loop through head to get columns.
/*this.props.columns.forEach(function(cols) {
header.push(<TableColumns data={cols.cols} key={cols.id} />);
});

// Loop through the returned rows and display.
this.props.results.forEach(function(result) {
rows.push(<TableRow data={result.rows} key={result.id} />);
});*/


// Return the table.
return (
<table className="table table-condensed">
<thead>
{header}
</thead>
<tbody>
{rows}
</tbody>
</table>
);
}
});

// Set up columns
var TableColumns = React.createClass({
render: function() {
var colNodes = this.props.data.map(function(col, i){
return (
<th key={i}>{col}</th>
);
});
return (
<tr>
{colNodes}
</tr>
);
}
});

// Set up row
var TableRow = React.createClass({
render: function() {
var rowNodes = this.props.data.map(function(row, i){
return (
<td key={i}>{row}</td>
);
});
return (
<tr>
{rowNodes}
</tr>
);
}
});

var futureContainer = document.getElementById('loadboardContainer');

ReactDOM.render(<Table source="getTableValues.php" />, futureContainer);


As you can see I have the commented out part of what used to be the props calls to the table. Now that I am trying to get the information from another file it looks like on here I have to use state.

On the other file this is what I have. Its just an array of array to return data before I actually query the stuff.

<?php
// Start the session.
session_start();

// Set Variables.
$returned = array(); // Returns results

$returned['resultRows'][0] = array();
$returned['resultRows'][0]['id'] = 10221;
$returned['resultRows'][0]['rows'] = array("654221", "2016-03-26", "Customer 1", "98755/54622", "Carrier 1", "Driver 1", "2016-03-28", "TX - IN", "DRY", "1240", "", "", "This is a test note");

$returned['resultRows'][1] = array();
$returned['resultRows'][1]['id'] = 10223;
$returned['resultRows'][1]['rows'] = array("654221", "2016-03-26", "Customer 1", "98755/54622", "Carrier 2", "Driver 2", "2016-03-28", "TX - IN", "DRY", "1240", "", "", "This is a test note2");

$returned['resultCols']['id'] = 100;
$returned['resultCols']['cols'] = array("PO Number", "Load Date", "Customer(s)", "Customer PO", "Carrier", "Driver", "Delivery Date", "Lane", "Temp", "Weight", "Attention Date", "ND Date", "Notes");

echo json_encode($returned);
?>


I keep getting an error this.state.columns.map is not a function.
The same is true if I use this.props. So what am I doing wrong on this? I know how to make it work if I statically put in the data and insert that way on the since page but the call is not working.

Answer

You try to map a string at the beginning because of async $.get

replace this :

getInitialState: function() {
  return {
     results: '',
     columns: ''
  }
}

by this :

getInitialState: function() {
  return {
     results: [],
     columns: []
  }
}

EDIT TO MATCH PHP RETURN

var Table = React.createClass({
  getInitialState: function() {
    return {
      results: [],
      columns: []
    }
  },
  componentDidMount: function() {
    this.serverRequest = $.get(this.props.source, function(result) {
      result = JSON.parse(result);
      this.setState({
        results: result['resultRows'],
        columns: result['resultCols'].cols
      });
    }.bind(this));
  },
  componentWillUnmount: function(){
    this.serverRequest.abort();
  },
  render: function() {    

    // Return the table.
    return (
      <table className="table table-condensed">
        <thead>
          <TableColumns data={this.state.columns} />
        </thead>
        <tbody>
          {this.state.results.map(function(result) {
            rows.push(<TableRow data={result.rows} key={result.id} />);
          })}
        </tbody>
      </table>
    );
  }
});

// Set up columns
var TableColumns = React.createClass({
  render: function() {
    var colNodes = this.props.data.map(function(col, i){
      return (
        <th key={i}>{col}</th>
      );
    });
    return (
      <tr>
        {colNodes}
      </tr>
    );
  }
});

// Set up row
var TableRow = React.createClass({
  render: function() {
    var rowNodes = this.props.data.map(function(row, i){
      return (
        <td key={i}>{row}</td>
      );
    });
    return (
      <tr>
        {rowNodes}
      </tr>
    );
  }
});

var futureContainer = document.getElementById('loadboardContainer');

ReactDOM.render(<Table source="getTableValues.php" />, futureContainer);