Warning: flattenChildren (...): Two children met

Question

I looked at the same problem , but could not figure out where my error is.

It works fine in my real-time search box, but as soon as you delete your search query (word), a warning appears in the responsive console:

Warning: flattenChildren (...): There were two children with the same key .$1. Children's keys must be unique; when two children share the key, only the first child will be used.

This is my entire jsx file:

var SearchBox = React.createClass({
    doSearch:function(){
      // remove .getDOMNode() for newer version of reat-rails 1.4.x
      var query = (this.refs.searchInput.value).toLowerCase(); // this is the search text
      this.props.doSearch(query);
    },
    render:function(){
        return <input type="text" ref="searchInput" placeholder="Search title, country and city" value={this.props.query} onChange={this.doSearch}/>
    }
});

var DisplayTable = React.createClass({
    render:function(){
        //making the cards to display
        var cards=[];
        var default_url = "/assets/profile_avatar/thumb/missing.png";
        this.props.data.map(function(s) {
          cards.push(
            <a href={'/users/' + s.user.id + '/supports/' + s.id} key={s.id}>
              <div className="card">
                <div className="row">
                  <div className="small-5 large-6 columns">
                    <h5>{s.support_title}</h5>
                  </div>
                  <div className=" fi small-3 large-3 columns">
                    Reward: {s.reward_after_support}
                  </div>
                  <div className="small-4 large-3 columns talr">
                     {s.remote_support == 'on' ? 'Remote / Anywhere' : s.city + ', '+ s.country}
                  </div>
                  <hr />
                  <div className="cl">
                    <img className="profile-img" src={ s.profiles[0].avatar_file_name === null ? default_url : s.profiles[0].avatar_url}></img><span>{s.profiles[0].first_name}</span>
                  </div>
                  <div className="cr">
                    Applications: {s.interest_recieved} |
                    Posted: {moment(s.created_at).fromNow()}
                  </div>
                </div>
              </div>
            </a>
           )
        });
        //returning the card
        return(
          <div>
            {cards}
          </div>
        );
    }
});

var InstantBox = React.createClass({
    doSearch:function(queryText){
        //console.log(queryText)
        //get query result
        var queryResult=[];
        this.props.data.map(function(s){
          if(s.support_title.toLowerCase().indexOf(queryText)!=-1) {
            queryResult.push(s);
          }
          if (s.city != null) {
            if(s.city.toLowerCase().indexOf(queryText)!=-1) {
              queryResult.push(s);
            }
          }

          if (s.country != null) {
            if(s.country.toLowerCase().indexOf(queryText)!=-1) {
              queryResult.push(s);
            }
          }
        });

        this.setState({
            query:queryText,
            filteredData: queryResult
        })
    },
    getInitialState:function(){
        return{
            query:'',
            filteredData: this.props.data
        }
    },
    render:function(){
        return (
            <div className="InstantBox">
              <div className="search">
                <SearchBox query={this.state.query} doSearch={this.doSearch}/>
              </div>
                <DisplayTable data={this.state.filteredData}/>
            </div>
        );
    }
});

I really don't see the problem. Did I miss something?

Answer 1

Quirk , indexOf()!=-1 , .

'Milan'.indexOf('M') // = 0
'Milan'.indexOf('Q') // = -1
'Milan'.indexOf('') // = 0 !!

, , doSearch() , - .

. .

: = "", - "", "r" . ​​ "r" → . "r" → .

, :

if ( queryText == '' // if no search, then show all
  || s.support_title.toLowerCase().indexOf(queryText)!=-1
  || (s.city && s.city.toLowerCase().indexOf(queryText)!=-1)
  || (s.country && s.country.toLowerCase().indexOf(queryText)!=-1) ){
    queryResult.push(s);
  }

, .

Sidenote: , , . :

cards = this.props.data.map(function(s) {
  <a ...
});