I am confused with how the react refs works.
The issue for me is, whenever I change the input select value, update_cart function is called.
I then call actions to set the value using relevant APIs.
However, currently, whenever I change the value, the whole component refreshes and the refs value are set to undefined.
What am I doing wrong?
Please note I have included only relevant codes.
/** @jsx React.DOM */
'use strict'
var React = require('react')
var connect = require("react-redux").connect
var moment = require('moment')
var actions=require("../actions");
var Calendar=require("./calendar");
var utils=require("../utils");
var CartChangeQty = require('./cart_change_qty')
var Table = require('react-bootstrap').Table
var Input = require('react-bootstrap').Input
var Register = require('./register')
var GroceryCheckout = React.createClass({
getInitialState: function() {
return {provinces: [], postal_codes: []};
},
render: function() {
console.log("GroceryCheckout.render");
var day_slots=[];
if (this.props.grocery_cart) {
var delivery_date=this.props.grocery_cart.delivery_date;
if (!delivery_date) delivery_date=this.props.grocery_cart.delivery_slots[0][0];
_.each(this.props.grocery_cart.delivery_slots,function(obj) {
if (obj[0]==delivery_date) {
day_slots=obj[1];
}
}.bind(this));
console.log("###### day_slots",day_slots);
}
return <div className="plr-grocery-checkout">
<a className="plr-anchor" id="checkout"></a>
<h2>Grocery Checkout</h2>
{function() {
if (!this.props.grocery_cart) return <p>Your grocery cart is empty.</p>;
if (!this.props.user_data) {
return <div>
<p>
Is this your first time ordering? <input type="radio" name="first_time" ref="first_time_yes" onClick={this.onchange_first_time.bind(this,true)}/> Yes <input type="radio" name="first_time" ref="first_time_no" onClick={this.onchange_first_time.bind(this,false)}/> No
</p>
{function() {
if (this.state.first_time==true) {
return <Register/>
} else if (this.state.first_time==false) {
return ///something
} else {
return <div>
///something
<div>
<h4><i className="glyphicon glyphicon-home"> </i> Delivery Address</h4>
<Input type="select" onChange={this.update_cart} ref="ship_address" style={{width:'auto',padding:'inherit',height:'auto'}}>
{this.props.user_data.contact_id.addresses.map(function(obj) {
return <option key={obj.id} value={obj.id}>{obj.address}</option>
})}
</Input>
<h4><i className="glyphicon glyphicon-calendar "> </i> Please select your preferred delivery time slot:</h4>
<Calendar />
<div className="form-group">
<label className="col-sm-2 control-label">Payment Method</label>
<div className="col-sm-6">
<Input type="select" onChange={this.update_cart} ref="pay_method" style={{width:'auto',padding:'inherit',height:'auto'}}>
{this.props.grocery_cart.payment_methods.map(function(obj) {
console.log("********************** payment method",obj.name)
return <option key={obj.id} value={obj.id}>{obj.name}</option>
}.bind(this))}
</Input>
</div>
</div>
<div className="form-group">
<label className="col-sm-2 control-label">Payment Amount</label>
<div className="col-sm-6">
<p>{this.props.grocery_cart.amount_total} ฿</p>
</div>
</div>
</div>
<hr/>
<h4><i className=" glyphicon glyphicon-list-alt"> </i> Other Information</h4>
<div className="form-horizontal">
<div className="form-group">
<label className="col-sm-2 control-label">Return Foam Box</label>
<div className="col-sm-6">
<input type="checkbox" onChange={this.update_cart}/>
<span style={{margin:10}}>For this delivery, would you like us to take back the foam box for recycling?</span>
</div>
</div>
</div>
<div className="form-horizontal">
<div className="form-group">
<label className="col-sm-2 control-label">No Call</label>
<div className="col-sm-6">
<input type="checkbox" onChange={this.update_cart}/>
<span style={{margin:10}}>For this delivery, please do NOT call me one hour before delivery to re-confirm unless delayed</span>
</div>
</div>
</div>
<button className="btn btn-lg btn-primary" onClick={this.send_order} disabled={this.props.grocery_cart.amount_total<1500?true:false}><span className="glyphicon glyphicon-ok"></span> Send Order</button>
{this.props.sending_grocery_order?<span><img src="/static/img/spinner.gif"/> Sending order...</span>:null}
{function() {
if (this.props.grocery_cart.amount_total>=1500) return;
return <span className="plr-warning" style={{marginLeft:"20px"}}>Min. order: 1500 ฿!</span>
}.bind(this)()}
</div>
}
}.bind(this)()}
</div>
},
onchange_first_time: function(value) {
console.log("GroceryCheckout.onchange_first_time",value);
this.setState({first_time: value});
},
update_cart: function() {
console.log("GroceryCheckout.update_cart");
console.log("this.refs.pay_method.value",this.refs.pay_method.value);
var vals={
customer_id: this.props.user_data.contact_id.id,
ship_address_id: this.refs.ship_address.value||null,
bill_address_id: this.refs.bill_address.value||null,
pay_method_id: parseInt(this.refs.pay_method.value),
};
this.props.dispatch(actions.grocery_cart_update(vals));
},
onchange_qty: function(product_id,qty) {
console.log("GroceryItem.onchange_qty",product_id,qty);
this.props.dispatch(actions.grocery_cart_set_qty(product_id,qty));
},
})
var select=function(state) {
return {
grocery_cart: state.grocery_cart,
grocery_cart_loading: state.grocery_cart_loading,
user_data: state.user_data,
user_data_loading: state.user_data_loading,
sending_grocery_order: state.sending_grocery_order,
}
}
module.exports=connect(select)(GroceryCheckout);
The input i am using is a react bootstrap
<Input type="select" onChange={this.update_cart} ref="ship_address" style={{width:'auto',padding:'inherit',height:'auto'}}>
{this.props.user_data.contact_id.addresses.map(function(obj) {
return <option key={obj.id} value={obj.id}>{obj.address}</option>
})}
</Input>
The problem was whenever the onchange was called the render method was again called. It rerenders because i am calling the set state in here.
One way to fix the issue is to put the input into a different component , where it just re renders that component on change .
Cheers.