Issue #2913244 by borisson_, StryKaizer: Disable boolean processor on non-boolean facets

src/Plugin/facets/processor/BooleanItemProcessor.php

@@ -2,6 +2,7 @@
 
 namespace Drupal\facets\Plugin\facets\processor;
 
+use Drupal\Core\TypedData\DataDefinitionInterface;
 use Drupal\facets\FacetInterface;
 use Drupal\Core\Form\FormStateInterface;
 use Drupal\facets\Processor\BuildProcessorInterface;
@@ -84,4 +85,17 @@ class BooleanItemProcessor extends ProcessorPluginBase implements BuildProcessor
     ];
   }
 
+  /**
+   * {@inheritdoc}
+   */
+  public function supportsFacet(FacetInterface $facet) {
+    $data_definition = $facet->getDataDefinition();
+    $property_definitions = $data_definition->getPropertyDefinitions();
+    foreach ($property_definitions as $k => $definition) {
+      if ($definition->getDataType() == "boolean") {
+        return TRUE;
+      }};
+    return FALSE;
+  }
+
 }

tests/src/Functional/ProcessorIntegrationTest.php

@@ -703,4 +703,15 @@ class ProcessorIntegrationTest extends FacetsTestBase {
     $this->assertNoFacetBlocksAppear();
   }
 
+  /**
+   * Tests that processors are hidden when the correct fields aren't there.
+   */
+  public function testHiddenProcessors() {
+    $facet_id = 'alpaca';
+    $this->editForm = 'admin/config/search/facets/' . $facet_id . '/edit';
+    $this->createFacet('Alpaca', $facet_id);
+    $this->drupalGet($this->editForm);
+    $this->assertSession()->pageTextNotContains('Boolean item label');
+  }
+
 }