ra-dependent-input

Introduces two new components for react-admin: and. Use these components to display inputs and fields depending on other inputs or fields values.

• Installation
• Usage
• API

Installation

Install with:

npm install --save ra-dependent-input

or

yarn add ra-dependent-input

Usage

Check that the field specified by dependsOn has a value (a truthy value):

import { Create, SimpleForm, TextInput, BooleanInput } from 'react-admin';
import { DependentInput } from 'ra-dependent-input';

export const UserCreate = (props) => (
    
        
            
            
            
            
                
            
        
    
);

Check that the field specified by dependsOn has a specific value:

import { Create, SimpleForm, TextInput, SelectInput } from 'react-admin';
import { DependentInput } from 'ra-dependent-input';

export const PostCreate = (props) => (
    
        
            

            

            
                
            

            
                
            

            
                
            
        
    
);

Check that the field specified by dependsOn matches a custom constraint:

import { Create, SimpleForm, TextInput, SelectInput } from 'react-admin';
import { DependentInput } from 'ra-dependent-input';

const checkCustomConstraint = (value) => value.startsWith('programming'));

export const PostCreate = (props) => (
    
        
            
            

            
                
            
        
    
);

All powers! Check whether the current full record matches your constraints:

import { Create, SimpleForm, TextInput, EmailInput } from 'react-admin';
import { DependentInput } from 'ra-dependent-input';

const checkRecord = (record) => record.firstName && record.lastName);

export const UserCreate = (props) => (
    
        
            
            

            
                
            
        
    
);

API

The DependentInput and DependentField components accepts the following props:

dependsOn

Either a string indicating the name of the field to check (eg: hasEmail) or an array of fields to check (eg: ['firstName', 'lastName']).

You can specify deep paths such as author.firstName.

value

If not specified, only check that the field(s) specified by dependsOn have a truthy value.

You may specify a single value or an array of values. Deep paths will be correctly retrieved and compared to the specified values.

If both value and resolve are specified, value will be ignored.

resolve

The resolve prop accepts a function which must return either true to display the child input or false to hide it.

If the dependsOn prop is specified, resolve will be called with either the value of the field specified by dependsOn (when a single field name was specified as dependsOn) or with an object matching the specified paths.

Note: When specifying deep paths (eg: author.firstName), resolve will be called with an object matching the specified structure. For example, when passing ['author.firstName', 'author.lastName'] as dependsOn, the resolve function will be passed the following object:

{ author: { firstName: 'bValue', lastName: 'cValue' } }

If dependsOn is not specified, resolve will be called with the current form values (DependentInput) or the full record (DependentField).

If both value and resolve are specified, value will be ignored.

Re-rendering the DependentInput children when the values of the dependencies change

This could be necessary to implement cascaded select. For example, a song may have a genre and a sub genre, which are retrieved with calls to an external service not hosted in our API. This is how we could display only the sub genres for the selected genre:

// in SubGenreInput.js
import React, { Component } from 'react';
import { translate, SelectInput } from 'react-admin';
import fetchSubGenres from './fetchSubGenres';

class SubGenreInput extends Component {
    state = {
        subgenres: [],
    }

    componentDidMount() {
        this.fetchData(this.props);
    }

    componentWillReceiveProps(nextProps) {
        if (nextProps.dependsOnValue !== this.props.dependsOnValue) {
            this.fetchData(nextProps);
        }
    }

    fetchData(props) {
        fetchSubGenres(props.dependsOnValue).then(subgenres => {
            this.setState({ subgenres });
        })
    }

    render() {
        return 
    }
}

SubGenreInput.propTypes = SelectInput.propTypes;
SubGenreInput.defaultProps = SelectInput.defaultProps;

export default SubGenreInput;