First of all, this is not a duplicate of this question, as I can't see my block even though I click Place Block.

Below is my block class. To the best of my knowledge, it should appear in the list, but it doesn't. What am I doing wrong? There is another block class, and that can be discovered.


namespace Drupal\tcmb\Plugin\Block;

use Drupal\Core\Block\BlockBase;

 * Provides a 'Tcmb Currency' block.
 * @Block(
 *  id = "tcmb_currency_block",
 *  admin_label = @Translation("Tcmb: currency"),
 *  category = @Translation("Tcmb")
 * )

 * Display TCMB currencies as a block.
class TcmbCurrencyBlock extends BlockBase {
  • Can you provide the folder path and the name of the file you put this code in? Your issue may be here. Make sure you're following this
    – No Sssweat
    Commented Apr 19, 2019 at 9:10
  • DRUPAL_ROOT/modules/custom/tcmb/src/Plugin/Block/TcmbCurrencyBlock.php
    – Kartagis
    Commented Apr 19, 2019 at 9:16
  • So far looks good. Do you have a public function build() { ? Did you clear the cache? Is the tcmb module enabled? Are you sure you're looking at the correct site? If you're not developing locally, did you make sure your file changes uploaded to the server?
    – No Sssweat
    Commented Apr 19, 2019 at 9:21
  • All of them are yes, but one thing caught my eye. When I open my own file and webform's block class in vim, webform's @Block annotation is blue, whereas mine is green. Could that mean something?
    – Kartagis
    Commented Apr 19, 2019 at 9:30
  • That was because @Block and the following ( had a space in between, and I fixed that, followed by drush cr and still no.
    – Kartagis
    Commented Apr 19, 2019 at 9:33

1 Answer 1


The problem was me creating a document block above the class, creating an interference between the class and annotation. Another lesson learned the hard way.

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