CODEWITHSUNDEEP
javascriptreactjsmongodbrestfetch-api
Kamil Lewandowski
Kamil Lewandowski

Reputation: 446

REACT fetch post request

I have problem with routing post request I need to build register form and post input from form to mongodb I made router and post route on server side and it works ok (when I use postman)

//form is required model​ 

router.route('/').post(function(req,res,next){
 res.send(req.body)
 form.create(
  {"first_name": req.body.first_name,
  "last_name": req.body.last_name
 })
  .then(function(data){ 
  res.send(data);
  console.log(data);
 }).catch(function(err){console.log(err)});
});

But I need to fire it form client side, not postman. And here i am lost. I can do it with but when i add onSubmit action it doesnt work. And I need to use new function to fire another thing without redirecting to another page. How to pass this.refs.first_name.value to body so that i could use fetch function?? Below react component

added this JavaScript/JSON snippet

export default class Form extends React.Component {
 constructor(props){
  super(props);
  this.handleSubmit = this.handleSubmit.bind(this);
 }
 handleSubmit(event){ 
  event.preventDefault();
  console.log(this.refs.first_name.value);
  fetch('/', {
   method: 'post',
   body: {
    "first_name": this.refs.first_name.value
   }
  });
 };
 render () {
  return (
   
   <div id="signup">
    <form onSubmit={this.handleSubmit}>
        <input ref="first_name" placeholder="First Name" type="text" name="first_name"/><br />
        <input placeholder="Last Name" type="text" name="last_name"/><br />
       <button type="Submit">Start</button>
    </form>
​
   </div>
​
  )
 }
}

Upvotes: 26

Views: 151533

Answers (4)

Sabri Mevis
Sabri Mevis

Reputation: 2431

This is how I made my post request in React.js;

const res = fetch('http://15.11.55.3:8040/Device/Movies', {
    method: 'post',
    headers: { 'Content-Type': 'application/json' },
    body: {
     id: 0,
    },
   })
   .then((response) => response.json())
   .then((responseJson) => {
     return responseJson.movies;
   })
   .catch((error) => {
     console.error(error);
   });

Upvotes: 3

Manoj Rana
Manoj Rana

Reputation: 3440

we need to make sending data as json stringify 

handleSubmit(event){ 
    event.preventDefault();
    fetch('/', {
       method: 'post',
       headers: {'Content-Type':'application/json'},
       body: JSON.stringify({
            "first_name": this.state.firstName
       })
    });
};

Upvotes: 21

Rohith Murali
Rohith Murali

Reputation: 5669

You can use the concept of controlled components.

For that, add state value,

constructor(props){
  super(props);
  this.handleSubmit = this.handleSubmit.bind(this);
  this.state={ firstname:"", lastname:""} 
}

Now input fields to be like,

<input placeholder="First Name" type="text" value={this.state.firstname} onChange={(ev)=>this.setState({firstname:ev.target.value})}/>
<input placeholder="Last Name" type="text" value={this.state.lastname} onChange={(ev)=>this.setState({lastname:ev.target.value})}/>

and handleSubmit should be like,

handleSubmit(event){ 
  event.preventDefault();
  fetch('/', {
   method: 'post',
   headers: {'Content-Type':'application/json'},
   body: {
    "first_name": this.state.firstName
   }
  });
 };

Upvotes: 1

Amir Hoseinian
Amir Hoseinian

Reputation: 2352

I guess the way you are using ref has been deprecated. try below see if you have any luck.

export default class Form extends React.Component {
 constructor(props){
  super(props);
  this.handleSubmit = this.handleSubmit.bind(this);
 }

 handleSubmit(event){ 
  event.preventDefault();
  fetch('/', {
   method: 'post',
   headers: {'Content-Type':'application/json'},
   body: {
    "first_name": this.firstName.value
   }
  });
 };

 render () {
  return (
   
   <div id="signup">
    <form onSubmit={this.handleSubmit}>
        <input ref={(ref) => {this.firstName = ref}} placeholder="First Name" type="text" name="first_name"/><br />
        <input ref={(ref) => {this.lastName = ref}} placeholder="Last Name" type="text" name="last_name"/><br />
       <button type="Submit">Start</button>
    </form>
​
   </div>
​
  )
 }
}

Here is a link to react docs about refs

Upvotes: 20

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