te')); return $arr; } /* 遍历用户所有主题 * @param $uid 用户ID * @param int $page 页数 * @param int $pagesize 每页记录条数 * @param bool $desc 排序方式 TRUE降序 FALSE升序 * @param string $key 返回的数组用那一列的值作为 key * @param array $col 查询哪些列 */ function thread_tid_find_by_uid($uid, $page = 1, $pagesize = 1000, $desc = TRUE, $key = 'tid', $col = array()) { if (empty($uid)) return array(); $orderby = TRUE == $desc ? -1 : 1; $arr = thread_tid__find($cond = array('uid' => $uid), array('tid' => $orderby), $page, $pagesize, $key, $col); return $arr; } // 遍历栏目下tid 支持数组 $fid = array(1,2,3) function thread_tid_find_by_fid($fid, $page = 1, $pagesize = 1000, $desc = TRUE) { if (empty($fid)) return array(); $orderby = TRUE == $desc ? -1 : 1; $arr = thread_tid__find($cond = array('fid' => $fid), array('tid' => $orderby), $page, $pagesize, 'tid', array('tid', 'verify_date')); return $arr; } function thread_tid_delete($tid) { if (empty($tid)) return FALSE; $r = thread_tid__delete(array('tid' => $tid)); return $r; } function thread_tid_count() { $n = thread_tid__count(); return $n; } // 统计用户主题数 大数量下严谨使用非主键统计 function thread_uid_count($uid) { $n = thread_tid__count(array('uid' => $uid)); return $n; } // 统计栏目主题数 大数量下严谨使用非主键统计 function thread_fid_count($fid) { $n = thread_tid__count(array('fid' => $fid)); return $n; } ?>javascript - Filtering JSON in React - Stack Overflow

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    javascript - Filtering JSON in React - Stack Overflow

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    I'm loading some JSON data using FETCH. I'm trying to add/create a simple filtering functionality on the content displayed.

    I'm getting this error:

    Uncaught TypeError: Cannot read property 'toLowerCase' of undefined

    Any idea what could be causing this error?

    This my code so far:

    let Table = React.createClass({
    getInitialState: function(){
        return { 
            accounts: [{
                "product": "Fixed Saver", 
                "interestRate": 2.20,
                "minimumDeposit": 500,
                "interestType": "Fixed"
            }],
            searchString: ''
        }
    },
    ponentDidMount: function(){
        fetch('http://localhost:8888/table/json/accounts.json')
            .then(response => {
                return response.json()
            })
            .then(json => {
                this.setState({accounts: json})
            });
    },
    handleChange: function(e){
        this.setState({searchString:e.target.value});
    },
    render: function(){
        var libraries,
        libraries = this.state.accounts,
        searchString = this.state.searchString.trim().toLowerCase();

        if(searchString.length > 0){
            libraries = libraries.filter(l => {
                return l.name.toLowerCase().match( searchString );
            });
        }

        return (
            <div className="container">

            <input type="text" value={this.state.searchString} onChange={this.handleChange} placeholder="Type here" />

                <ul className="header clearfix">
                    <li>Product</li>
                    <li>Interest rate</li>
                    <li>Minimum deposit</li>
                    <li>Interest type</li>
                </ul>

                {libraries.map(l => {
                return (
                    <div className="account clearfix" key={l.id}>
                        <div className="product">{l.product}</div>
                        <div>{l.interestRate} %</div>
                        <div>£ {l.minimumDeposit}</div>
                        <div>{l.interestType}</div>
                    </div>
                    )
                })} 
            </div>
        )
    }
});

let App = React.createClass({
    render: function(){
        return(
            <Table />
        );
    }
});

ReactDOM.render( <App />, document.getElementById('table') );

    JSON

    [
   {
      "id": 1,
      "product": "Fixed Saver", 
      "interestRate": 2.20,
      "minimumDeposit": 500,
      "interestType": "Fixed"
   },
   {
      "id": 2,
      "product": "Fixed Saver", 
      "interestRate": 1.50,
      "minimumDeposit": 0,
      "interestType": "Tracker"
   },
   {
      "id": 3,
      "product": "Offset Saver", 
      "interestRate": 1.8,
      "minimumDeposit": 1000,
      "interestType": "Fixed"
   }
]

    I'm loading some JSON data using FETCH. I'm trying to add/create a simple filtering functionality on the content displayed.

    I'm getting this error:

    Uncaught TypeError: Cannot read property 'toLowerCase' of undefined

    Any idea what could be causing this error?

    This my code so far:

    let Table = React.createClass({
    getInitialState: function(){
        return { 
            accounts: [{
                "product": "Fixed Saver", 
                "interestRate": 2.20,
                "minimumDeposit": 500,
                "interestType": "Fixed"
            }],
            searchString: ''
        }
    },
    ponentDidMount: function(){
        fetch('http://localhost:8888/table/json/accounts.json')
            .then(response => {
                return response.json()
            })
            .then(json => {
                this.setState({accounts: json})
            });
    },
    handleChange: function(e){
        this.setState({searchString:e.target.value});
    },
    render: function(){
        var libraries,
        libraries = this.state.accounts,
        searchString = this.state.searchString.trim().toLowerCase();

        if(searchString.length > 0){
            libraries = libraries.filter(l => {
                return l.name.toLowerCase().match( searchString );
            });
        }

        return (
            <div className="container">

            <input type="text" value={this.state.searchString} onChange={this.handleChange} placeholder="Type here" />

                <ul className="header clearfix">
                    <li>Product</li>
                    <li>Interest rate</li>
                    <li>Minimum deposit</li>
                    <li>Interest type</li>
                </ul>

                {libraries.map(l => {
                return (
                    <div className="account clearfix" key={l.id}>
                        <div className="product">{l.product}</div>
                        <div>{l.interestRate} %</div>
                        <div>£ {l.minimumDeposit}</div>
                        <div>{l.interestType}</div>
                    </div>
                    )
                })} 
            </div>
        )
    }
});

let App = React.createClass({
    render: function(){
        return(
            <Table />
        );
    }
});

ReactDOM.render( <App />, document.getElementById('table') );

    JSON

    [
   {
      "id": 1,
      "product": "Fixed Saver", 
      "interestRate": 2.20,
      "minimumDeposit": 500,
      "interestType": "Fixed"
   },
   {
      "id": 2,
      "product": "Fixed Saver", 
      "interestRate": 1.50,
      "minimumDeposit": 0,
      "interestType": "Tracker"
   },
   {
      "id": 3,
      "product": "Offset Saver", 
      "interestRate": 1.8,
      "minimumDeposit": 1000,
      "interestType": "Fixed"
   }
]
    • javascript
    • json
    • reactjs
    • filtering
    Share Improve this question asked Sep 22, 2016 at 2:53 JohnJohn 3,78914 gold badges44 silver badges49 bronze badges 1
    • can you verify accounts get populated in console?My guess is your fetch doesn't bind to the ponent itself – kasperite Commented Sep 22, 2016 at 3:00
    Add a ment  | 

    1 Answer 1

    Reset to default 12

    Seem that you got the error from this line

    libraries = libraries.filter(l => {
  return l.name.toLowerCase().match( searchString );
});

    Because of l.name is undefined. You can check again your JSON data. It doesn't have name attribute, seem that it is product.

    You should not modify your state directly by: libraries = libraries.filter... State should be updated by setState function. In this case you should create temporary variable to display the results instead of directly use libraries variable. I believe if your sample is worked, you only may search for the first time and next time the results will be only in your last search results, though.

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