Select checked value show


Topic: Select checked value show

movework pro premium asked 3 years ago

Hi,

I have a problem with the value that is displayed when we change the value of a select. My problem is weird because I use MDBSelect elsewhere and I don't have the problem.

In my render, I have this:

const options = [{checked: true, text: "bedroom", value: "7441"},{checked: false, text: "bathroom", value: "7449"}, {checked: false, text: "wc", value: "7474"}];

<MDBSelect
        name={id}
        getValue={this.handleChange}
        id={"room"}
        options={options}
    />

And when I redo a render by changing the values ​​of my variable by this, I always have "bedroom" displayed, not "bathroom".

const options = [{checked: false, text: "bedroom", value: "7441"},{checked: true, text: "bathroom", value: "7449"}, {checked: false, text: "wc", value: "7474"}];

Yet when I do an "inspect" on the select, I see "bathroom" :

<div name="room" id="room" options="[object Object],[object Object],[object Object]" value="" data-multiple="false"
 className="select-wrapper mdb-select md-form">
<span className="caret">▼</span>
<input type="text" className="select-dropdown" value="bathroom">
<ul className="dropdown-content select-dropdown fadeElement">...</ul>

Do you see where the problem comes from?


Aliaksandr Andrasiuk staff answered 3 years ago

Hi,

Can you show me the full code? Because I can't understand what's the problem.

In what way do you change your options?

The better way will be to store your options in the state.

For example:

import React, { Component } from "react";
import { MDBContainer, MDBSelect } from "mdbreact";

class App extends Component {
  state = {
    options: [
      { checked: true, text: "bedroom", value: "7441" },
      { checked: false, text: "bathroom", value: "7449" },
      { checked: false, text: "wc", value: "7474" }
    ]
  };

  render() {
    return (
      <MDBContainer>
        <MDBSelect
          selected=""
          getValue={this.handleChange}
          id={"room"}
          options={this.state.options}
        />
      </MDBContainer>
    );
  }
}

export default App;

movework pro premium answered 3 years ago

Hi,

I simplified my code because it is more complex but by doing like this, I still have my problem

import React, {Component} from 'react'
import {MDBSelect} from 'mdbreact'



class BarRight extends Component {

    state = {
        currentRoom: 7441
    }


    setRoom = (t) => {
        if(t[0] != this.state.currentRoom) this.setState({currentRoom: t[0]});
    }

    render() {

        const {currentRoom} = this.state;

        let options = [
            { checked: false, text: "bedroom", value: "7441" },
            { checked: false, text: "bathroom", value: "7449" },
            { checked: false, text: "wc", value: "7474" }
        ];


        for(const i in options){
            if(options[i].value == currentRoom) options[i].checked = true;
        }

        console.log(options);

        return (
        <div className={'bar-right-wrapper'} style={{'width': '250px'}}>
            <div className={'col-12'}>
                <MDBSelect
                    getValue={this.setRoom}
                    id={'room'}
                    selected={""}
                    options={options}
                ></MDBSelect>
            </div>
        </div>
        )
    }
}

export default BarRight

Aliaksandr Andrasiuk staff answered 3 years ago

Hi,

Is it necessary to not store your options in the state? It should resolve this problem.

You can try this code :

import React, { Component } from "react";
import { MDBSelect } from "mdbreact";

class BarRight extends Component {
  state = {
    currentRoom: 7441,
  };

  setRoom = t => {
    if (t[0] !== this.state.currentRoom) this.setState({ currentRoom: t[0] });
  };

  render() {
    const { currentRoom } = this.state;

    let options = [
      { checked: currentRoom === "7441", text: "bedroom", value: "7441" },
      { checked: currentRoom === "7449", text: "bathroom", value: "7449" },
      { checked: currentRoom === "7474", text: "wc", value: "7474" }
    ];

    return (
      <div className={"bar-right-wrapper"} style={{ width: "250px" }}>
        <div className={"col-12"}>
          <MDBSelect
            getValue={this.setRoom}
            id={"room"}
            selected={""}
            options={options}
          />
        </div>
      </div>
    );
  }
}

export default BarRight;

It works but it doesn't show the selected value after first initialization.


movework pro premium answered 3 years ago

Hi,

I don't really understand why but I did as you said and it works: store options in state and set checked true in the render

Thanks


Aliaksandr Andrasiuk staff commented 3 years ago

Glad I could help. If you have any questions I'm happy to help.

Best regards.


Please insert min. 20 characters.

FREE CONSULTATION

Hire our experts to build a dedicated project. We'll analyze your business requirements, for free.

Status

Answered

Specification of the issue
  • User: Pro
  • Premium support: Yes
  • Technology: MDB React
  • MDB Version: 4.13.0
  • Device: -
  • Browser: Chrome 74.0.3729.157
  • OS: -
  • Provided sample code: No
  • Provided link: No
Tags