How to create multiple meta fields in gutenberg block - wordpress

Question

I need to create a wordpress Gutenberg block that will allow me to insert some data as name and surname, company name, the best sentence from the references.
So far I managed to create a Gutenberg block that is saving one text field.
dc-references-block.php
// register custom meta tag field
function dcr_register_post_meta() {
register_post_meta( 'page', 'dc_references_block_field', array(
'show_in_rest' => true,
'single' => true,
'type' => 'string',
) );
}
add_action( 'init', 'dcr_register_post_meta' );
function dcr_enqueue() {
wp_enqueue_script(
'dc-references-block-script',
plugins_url( 'dc-references-block.js', __FILE__ ),
array( 'wp-blocks', 'wp-element', 'wp-components' )
);
}
add_action( 'enqueue_block_editor_assets', 'dcr_enqueue' );
dc-references-block.js
( function( wp ) {
var el = wp.element.createElement;
var registerBlockType = wp.blocks.registerBlockType;
var TextControl = wp.components.TextControl;
registerBlockType( 'dc-references-block/dc-references-block', {
title: 'Title',
icon: 'edit',
category: 'common',
attributes: {
blockValue: {
type: 'string',
source: 'meta',
meta: 'dc_references_block_field'
}
},
edit: function( props ) {
var className = props.className;
var setAttributes = props.setAttributes;
function updateBlockValue( blockValue ) {
setAttributes({ blockValue });
}
return el(
'div',
{ className: className },
el( TextControl, {
label: 'write here name of company',
value: props.attributes.blockValue,
onChange: updateBlockValue
}
)
);
},
save: function() {
return null;
}
} );
} )( window.wp );
Whenever I try to add a second text field or textarea to the block I get an error "site does not support this block".
Could anyone explain to me how to, in this situation, add correctly more then one text field and textarea to a block?

Answer 1

It would be better if you included the code that did not work. In any case, I changed your code by adding another text input and a textarea (with relevant entries in attributes and meta).
Here is the modified code. Also, I have changed some of the code to be more readable.
Javascript
( function( wp ) {
const el = wp.element.createElement;
const registerBlockType = wp.blocks.registerBlockType;
const TextControl = wp.components.TextControl;
const TextareaControl = wp.components.TextareaControl;
registerBlockType( 'dc-references-block/dc-references-block', {
title: 'Title',
icon: 'edit',
category: 'common',
attributes: {
blockValue: {
type: 'string',
source: 'meta',
meta: 'dc_references_block_field'
},
// Add two new attributes
name: {
type: 'string',
source: 'meta',
meta: 'dc_references_block_field_name'
},
desc: {
type: 'string',
source: 'meta',
meta: 'dc_references_block_field_desc'
}
},
edit: function( props ) {
const className = props.className;
const setAttributes = props.setAttributes;
// Original element with onChange event as an anonymous function
const text = el( TextControl, {
label: 'write here name of company',
value: props.attributes.blockValue,
key: 'companyName',
onChange: function( value ) {
setAttributes( { name: value } );
}
} );
//Add two new elements
const secondText = el( TextControl, {
label: 'Write your name',
value: props.attributes.name,
key: 'username',
onChange: function( value ) {
setAttributes( { name: value } );
}
} );
const textArea = el( TextareaControl, {
label: 'Write a description',
value: props.attributes.desc,
key: 'desc',
onChange: function( value ) {
setAttributes( { desc: value } );
}
} );
return el(
'div',
{ className: className },
// Children of the main div as an array
[ text, secondText, textArea ]
);
},
save: function() {
return null;
}
} );
}( window.wp ) );
PHP
register_post_meta( 'page', 'dc_references_block_field', array(
'show_in_rest' => true,
'single' => true,
'type' => 'string',
) );
// register two new meta corresponding to attributes in JS
register_post_meta( 'page', 'dc_references_block_field_name', array(
'show_in_rest' => true,
'single' => true,
'type' => 'string',
) );
register_post_meta( 'page', 'dc_references_block_field_desc', array(
'show_in_rest' => true,
'single' => true,
'type' => 'string',
) );