Body: <p>I am working on a plugin for Craft 3 that will add new matrix data to users profile and keep the old/current data that is in the matrix field.</p>
  
  <p>I have been looking at these but they are for Craft 2 so maybe that's the problem:</p>
  
  <ul>
  <li><p><a href="https://craftcms.stackexchange.com/questions/9996/updating-user-profile-matrix-block-with-plugin">Updating user profile matrix block with plugin</a></p></li>
  <li><p><a href="https://craftcms.stackexchange.com/questions/9054/creating-a-matrix-entry-with-a-plugin?rq=1">Creating a matrix entry with a plugin</a></p></li>
  </ul>
  
  <p>The below is what I have tried but getting the error "Class 'controllers\MatrixBlockModel' <strong>not found</strong>"</p>
  
  <pre><code>$member_id = Craft::$app-&gt;getUser()-&gt;getId();
  $dateCreated = date('Y-m-d H:i:s');
  
  $block = new MatrixBlockModel();
  $block-&gt;fieldId = 77;
  $block-&gt;ownerId = $member_id; //Users ID
  $block-&gt;typeId = 11; //Block Types ID
  $block-&gt;ownerLocale = 'en_us';
  $block-&gt;sortOrder = 1;
  
  $block-&gt;getContent()-&gt;setAttributes(array(
      'fileDownloaded' =&gt; 'fileDownloadedxxxxprotectedlinks_links',
      'manufacturer' =&gt; 'manufacturerxxxxprotectedlinks_links',
      'date' =&gt;  $dateCreated,
  ));
  
  $success = Craft::$app-&gt;matrix-&gt;saveBlock($block);
  </code></pre>
  
  <p>I also added:</p>
  
  <pre><code>use craft\elements\MatrixBlock;
  </code></pre>
  
  <p>Any ideas?</p>
  
Comments.ContentLicense: CC BY-SA 4.0
Comments.CreationDate: 2018-06-07T21:51:08.400Z
Comments.Text: I have a feeling your namespace is off, brush up here and see if anything is wrong http://php.net/manual/en/language.namespaces.php
Comments.UserDisplayName: Clark Nelson
Comments.ContentLicense: CC BY-SA 4.0
Comments.CreationDate: 2018-06-09T09:10:49.790Z
Comments.Text: As Clark already said: `MatrixBlockModel` is the wrong class, you want `new craft\elements\MatrixBlock()`
Comments.UserDisplayName: Robin Schambach
Tags: <plugin-development>
Title: Updating user profile matrix block with plugin (Craft 3)
ThreadText: # Updating user profile matrix block with plugin (Craft 3)
  
  (Asked by: username_0 on 2018-06-07)
  
  I am working on a plugin for Craft 3 that will add new matrix data to users profile and keep the old/current data that is in the matrix field.
  
  I have been looking at these but they are for Craft 2 so maybe that's the problem:
  
  * [Updating user profile matrix block with plugin](https://craftcms.stackexchange.com/questions/9996/updating-user-profile-matrix-block-with-plugin)
  * [Creating a matrix entry with a plugin](https://craftcms.stackexchange.com/questions/9054/creating-a-matrix-entry-with-a-plugin?rq=1)
  
  The below is what I have tried but getting the error "Class 'controllers\MatrixBlockModel' **not found**"
  
  ```
  $member_id = Craft::$app->getUser()->getId();
  $dateCreated = date('Y-m-d H:i:s');
  
  $block = new MatrixBlockModel();
  $block->fieldId = 77;
  $block->ownerId = $member_id; //Users ID
  $block->typeId = 11; //Block Types ID
  $block->ownerLocale = 'en_us';
  $block->sortOrder = 1;
  
  $block->getContent()->setAttributes(array(
      'fileDownloaded' => 'fileDownloadedxxxxprotectedlinks_links',
      'manufacturer' => 'manufacturerxxxxprotectedlinks_links',
      'date' =>  $dateCreated,
  ));
  
  $success = Craft::$app->matrix->saveBlock($block);
  
  ```
  
  I also added:
  
  ```
  use craft\elements\MatrixBlock;
  
  ```
  
  Any ideas?
  
  **Tags:** plugin-development
  
  > **Comments:**
  > **username_1**: I have a feeling your namespace is off, brush up here and see if anything is wrong http://php.net/manual/en/language.namespaces.php  
  > **username_2**: As username_1 already said: `MatrixBlockModel` is the wrong class, you want `new craft\elements\MatrixBlock()`  
  
  ---
  
  ## 0 answers
  
  