Loop through a multi value entity reference field working only on the first selected item

Question

1) I have an entity reference view articles_per_user listing all nodes of type article authored by the current logged in user.

2) On the Article Entity, there is a taxonomy reference field field_article_country referencing the taxonomy vocabulary: "Countries" (One value is allowed)

3) On the User Entity, there is a multi-value taxonomy reference field field_user_article_countries referencing the same taxonomy vocabulary: "Countries" (Unlimited value are allowed)

4) On a Webform, I have an entity reference field articles referencing the above entity reference view 'articles_per_user' with unlimited values where the users can select one or more article.

5) When Webform is submitted, I want to:

1. Load each selected Article.
2. Get value of the field_article_country
3. Load the current logged in user entity.
4. Set the retrieved value to field_user_article_countries
5. Save the User entity.

Quick Demonstration:

Say the Current User selected on the Webform 3 articles where:

• Article 1 has field_article_country = United States
• Article 2 has field_article_country = Egypt
• Article 3 has field_article_country = Spain

After the Webform is submitted, the field_user_article_countries at the User Entity must have 3 values selected:

• United States
• Egypt
• Spain

The error I am facing is at field_user_article_countries, I see only one value selected:

• United States

Below is my code:

// Function to be fired while submitting the Webform.
public function submitForm(array &$form, FormStateInterface $form_state, WebformSubmissionInterface $webform_submission) {

    // Load the account of current logged in user.
    $CurrentUid = \Drupal::currentUser()->id();
    $CurrentUser = \Drupal\user\Entity\User::load($CurrentUid);

    // Get the selected 'Articles' Value.
    $ArticleIDs = $values['articles'];     // NIDs

    // Load all "Articles" according to their IDs.
    $Articles = \Drupal\node\Entity\Node::loadMultiple($ArticleIDs);

    // Loop through loaded articles entities.
    foreach ($Articles as $Article) {

    // Get the "Article Country" Value from the loaded article.
    $ArticleCountry = $Article->get('field_article_country')->target_id;

    // Set the 'User Country' value on the user account.
    $CurrentUser->set('field_user_article_countries', $ArticleCountry);
    }

    // Save the User account.
    $CurrentUser->save();

}

Answer 1

foreach ($Articles as $Article) {

  // Get the "Article Country" Value from the loaded article.
  $ArticleCountry = $Article->field_article_country->target_id; // shorter way

  // Set the 'User Country' value on the user account.
  $CurrentUser->field_user_article_countries[] = ['target_id' => $ArticleCountry]; // use array

}