<SimpleFormIteratorBase>

<SimpleFormIteratorBase> helps building a component that lets users edit, add, remove and reorder sub-records. It is designed to be used as a child of <ArrayInputBase> or <ReferenceManyInputBase>. You can also use it within an ArrayInputContext containing a field array, i.e. the value returned by react-hook-form’s useFieldArray hook.

Usage

Here’s how one could implement a minimal SimpleFormIterator using <SimpleFormIteratorBase>:

import {
    SimpleFormIteratorBase,
    SimpleFormIteratorItemBase,
    useArrayInput,
    useFieldValue,
    useSimpleFormIterator,
    useSimpleFormIteratorItem,
    useWrappedSource,
    type SimpleFormIteratorBaseProps
} from 'ra-core';

export const SimpleFormIterator = ({ children, ...props }: SimpleFormIteratorBaseProps) => {
    const { fields } = useArrayInput(props);
    // Get the parent source by passing an empty string as source
    const source = useWrappedSource('');
    const records = useFieldValue({ source });

    return (
        <SimpleFormIteratorBase {...props}>
            <ul>
                {fields.map((member, index) => (
                    <SimpleFormIteratorItemBase
                        key={member.id}
                        index={index}
                        record={record}
                    >
                        <li>
                            {children}
                            <RemoveItemButton />
                        </li>
                    </SimpleFormIteratorItemBase>
                ))}
            </ul>
            <AddItemButton />
        </SimpleFormIteratorBase>
    )
}

const RemoveItemButton = () => {
    const { remove } = useSimpleFormIteratorItem();
    return (
        <button type="button" onClick={() => remove()}>Remove</button>
    )
}

const AddItemButton = () => {
    const { add } = useSimpleFormIterator();
    return (
        <button type="button" onClick={() => add()}>Add</button>
    )
}

Props

Prop	Required	Type	Default	Description
children	Optional	ReactNode	-	List of inputs to display for each array item