Trying to get the row information on clicking a row on table in reactJS

Question

I am building a simple app in ReactJS that works with a JSON array by calling a certain API. I am then populating the results of the array in a table. What I now want is to click on any row in the table and get those values to pass into some other component. I am wondering how to get the row information using onClick.

Here is my code.

class ParentComponent extends Component {

constructor(props){
  super(props);
  this.state = {data: []};
}


componentDidMount() {
   fetch('http://hostname:xxxx/yyyy/zzzz')
  .then(function(response) {
   return response.json();
  })
  .then(items=>this.setState({data: items}));
 } 

fetchAccountDetails () {

}

render(){
var newdata = this.state.data;

        return (
            <table className="m-table">
                <thead>
                        <tr>
                            <th>AccountName</th>
                            <th>ContractValue</th>
                        </tr>
                    </thead>
                <tbody>
                    {
                      newdata.map(function(account, index){
                        return (
                          <tr key={index} data-item={account}  onClick={this.fetchAccountDetails()}>
                            <td data-title="Account">{account.accountname}</td>
                            <td data-title="Value">{account.negotiatedcontractvalue}</td>
                          </tr>
                              )
                            }
                          )
                    }
                </tbody>
              </table>
            );
        }
    }

export default ParentComponent;

Shubham Khatri · Accepted Answer · 2017-06-01 17:52:30Z

1

Pass the index of the state element and retrieve from the state array. Also it is not required to copy state to another variable before mapping, you can do it with state itself

 render(){

    return (
        <table className="m-table">
            <thead>
                    <tr>
                        <th>AccountName</th>
                        <th>ContractValue</th>
                    </tr>
                </thead>
            <tbody>
                {
                  this.state.data.map((account, index) => {
                    return (
                      <tr key={index} data-item={account}  onClick={() => this.fetchAccountDetails(index)}>
                        <td data-title="Account">{account.accountname}</td>
                        <td data-title="Value">{account.negotiatedcontractvalue}</td>
                      </tr>
                          )
                        }
                      )
                }
            </tbody>
          </table>
        );
    }
}

fetchAccountDetails(index) {
    var values = this.state.data[index];
    console.log(values);
}

edited Jun 1, 2017 at 17:52

answered Jun 1, 2017 at 17:30

Shubham Khatri

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7 Comments

Midhun Mathew Sunny Over a year ago

Forgot to mention. I am getting this error when I add onClick property to the row.

TypeError: Cannot read property 'fetchAccountDetails' of undefined at http://localhost:8070/dist/index.js:2558:65  at Array.map (native)

Shubham Khatri Over a year ago

Didn't see it, that is a binding issue, use arrow function in map, updated the code for it

Midhun Mathew Sunny Over a year ago

Thanks. I have added those changes. Now, when I refresh the page, in the console, all values are printed without clicking on the rows. 'onClick' seems not to work. Also I have added index parameter while using fetchAccountDetails in 'onClick'

Shubham Khatri Over a year ago

Sorry my mistake, I had overwritten what was there in my first answer, you need to call onClick like onClick = {() => {this.fetchAccountDetails(index)}}

Midhun Mathew Sunny Over a year ago

Sure. Can you also tell me how this value can be passed to a different component while clicking on that row.

|

Vikram Saini · Accepted Answer · 2017-06-01 17:29:55Z

0

fetch the value using

fetchAccountDetails (event) {

Account:event.target.value
this.getData(Account);
}

getData: function(var account)
this.setState({
        state: account
    });

Now you have your data set as state and you can use it anywhere you want yo

answered Jun 1, 2017 at 17:29

Vikram Saini

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