BBGuy

/**
 * Implements hook_form_alter().
 */
function dwwcommerce_form_alter(&$form, &$form_state, $form_id) {
  // The style edit form.
  if ($form_id == 'product_style_node_form') {
    // Add a custom submit.
    $form['actions']['submit']['#submit'][] = 'mymodule_node_prod_display_form_submit';
  }
}

BBGuy

<?php

  // Get the request object.
  $request = \Drupal::request();
  // Query - get all parameter. 
  $q = $request->query->all();
  // Check if a query parameter exists.
  if ($request->query->has('commerce_product_v_id')) {
    // Get the query parameter.
    $pvid = $request->query->get('commerce_product_v_id');

BBGuy

<?php

// Working with commerce stock 8.x-1.x

// ****** Usfull commerce code. ******

    // Get the curent store and user 
    $currentStore = \Drupal::service('commerce_store.current_store')->getStore();
    $currentUser =   \Drupal::currentUser();
    // Load the user object

BBGuy

### Keybase proof

I hereby claim:

  * I am BBGuy on github.
  * I am guy_schneerson (https://keybase.io/guy_schneerson) on keybase.
  * I have a public key whose fingerprint is E0F9 7435 1C0D 3783 458E  5F99 CE91 6F6F 7690 BF49

To claim this, I am signing this object:

BBGuy

<?php

//******** user ***************//

  $current_user = \Drupal::currentUser();
  $current_user_id \Drupal::currentUser()->id();
  $user = User::load($user_id);


//******** messenger - set messeges ***************//

BBGuy

<?php

use Drupal\Core\Database\Database;

/**
 * Implements hook_schema().
 *
 *  Notes:
 * 'not null' = requiered
 */

BBGuy

<?php

public function buildForm(array $form, FormStateInterface $form_state) {

    // If the form was submited the form build has access to the user entered data.
    $user_input = $form_state->getUserInput();
    $has_been_submitted = !empty($user_input);
    
    // multiple submit buttons
    $form['cases']['submit'] = [

BBGuy

<?php

// Util functions to load a select lists options from a taxonomy or a node field with a text list.

function build_form() {
  $form = [];
  
  // Load a two level deep select tree from a taxonomy
  $options = load_taxonomy_as_select_options('example_taxonomy');
  $form['select_tree'] = [

BBGuy

<?php

use Drupal\file\Entity\File;

// Load a file using its ID
  $file = File::load($fid);


// Find a file using its URI

BBGuy

<?php

// Field group does not by default show on commerce relaed entities and those can be added using a hook

/**
 * Implements hook_field_group_content_element_keys_alter
 *
 * Add field groups to product and product variation.
 */
function fcl_commerce_field_group_content_element_keys_alter(&$keys) {