React : How to Show Message if there is no records

Question

I am working on project in ReactJS, I am fetching data from server through API. I did some search filtration, I want to display message if there is no records available? I am beginner to ReactJS and don't have much knowledge related to ReactJS.

Code:

        class Example extends React.Component {
  constructor(props) {
    super(props);

    this.state = {
      Item: 5,
      skip: 0
    }

    this.handleClick = this.handleClick.bind(this);
  }

  urlParams() {
    return `http://localhost:3001/meetups?filter[limit]=${(this.state.Item)}&&filter[skip]=${this.state.skip}`
  }

  handleClick() {
    this.setState({skip: this.state.skip + 1})
  }

  render() {
    return (
      <div>
        <a href={this.urlParams()}>Example link</a>
        <pre>{this.urlParams()}</pre>
        <button onClick={this.handleClick}>Change link</button>
      </div>
    )
  }
}


ReactDOM.render(<Example/>, document.querySelector('div#my-example' ))

Solution 1

You can check when you get the data back and set an error if no data:

  getData(){
    const {Item,skip}=this.state;
    axios.get(`http://localhost:8001/parties?filter[limit]=${Item}&&filter[skip]=${skip}`)
    .then(response=>{
      console.log(response.data);
      if (!response.data.length) {
        this.setState({noData: true}) 
      } else {
        this.setState({
          data:response.data, noData: false
        })
      }
    })
  }

Then in your render function:

render() {
  if (this.state.noData) {
    return <p>No Data was returned!</p>;
  }
  ...

Solution 2

You could check for the data before render the component and return another component if you don't have any. Using expressions such This example ‘’’ { doIHaveData ? < Component1 /> : < Component2 />} ‘’’

Where Component1 has your functionality and Component2 return a message or a spinner loader whatever you want .

I hope it helps!

When you are checking for the empty array you could check for array type and length. I would personally do something like

 {Array.isArray(array) && array.length === 0 ? <component1/> : <component2/>} 

Solution 3

You can make use of conditional rendering!

render(){
const filteredItems = this.getDataItems(this.state.filtered);
const dataItems = this.getDataItems(this.state.data);

if(dataItems){
return(
 <div>Your Message</div>
)
}
else{
//Your normal code

}
}

Comments

[Jon]

Actually , It not working . I want that if there is no data in array I want to show message .

[Jon]

I want to set error on search filter , if there is no data in array

[jsdeveloper]

Ok in render() just check if this.state.filteredData has any results. If not, add an error message in the render output.

[Jon]

Tried but still not working ! Can you please edit your answer and write exact code ? Thanks

[jsdeveloper]

Jon - I think you need to take the time to try to understand the technologies you are working with. What will you learn if others write the solution every time?