admin-on-rest-fr05t1k/src/mui/form/getDefaultValues.js

A frontend Framework for building admin applications on top of REST services, using ES6, React and Material UI

import { Children } from 'react';
import { createSelector } from 'reselect';
import set from 'lodash.set';

const getDefaultValues = (children, data = {}, defaultValue = {}) => {
    const globalDefaultValue = typeof defaultValue === 'function' ? defaultValue() : defaultValue;
    const defaultValueFromChildren = children
        .map(child => ({ source: child.props.source, defaultValue: child.props.defaultValue }))
        .reduce((prev, next) => {
            if (next.defaultValue != null) {
                set(
                    prev,
                    next.source,
                    typeof next.defaultValue === 'function' ? next.defaultValue() : next.defaultValue,
                );
            }
            return prev;
        }, {});
    return { ...globalDefaultValue, ...defaultValueFromChildren, ...data };
};

const getChildren = (state, props) => props.children;
const getRecord = (state, props) => props.record;
const getDefaultValue = (state, props) => props.defaultValue;


export default createSelector(
    getChildren, getRecord, getDefaultValue,
    (children, record, defaultValue) => getDefaultValues(Children.toArray(children), record, defaultValue)
);