Issue #2951715 by dravenk, marvil07, rakesh.gectcr, davidsonjames, heddn, Jo...

Issue #2951715 by dravenk, marvil07, rakesh.gectcr, davidsonjames, heddn, Jo Fitzgerald, quietone, alexpott, maxocub: Log message if static_map plugin skips the row

core/modules/migrate/src/Plugin/migrate/process/StaticMap.php

@@ -3,6 +3,7 @@
 namespace Drupal\migrate\Plugin\migrate\process;
 
 use Drupal\Component\Utility\NestedArray;
+use Drupal\Component\Utility\Variable;
 use Drupal\migrate\ProcessPluginBase;
 use Drupal\migrate\MigrateException;
 use Drupal\migrate\MigrateExecutableInterface;
@@ -140,7 +141,7 @@ public function transform($value, MigrateExecutableInterface $migrate_executable
         return $this->configuration['default_value'];
       }
       if (empty($this->configuration['bypass'])) {
-        throw new MigrateSkipRowException();
+        throw new MigrateSkipRowException(sprintf("No static mapping found for '%s' and no default value provided for destination '%s'.", Variable::export($value), $destination_property));
       }
       else {
         return $value;

core/modules/migrate/tests/src/Unit/process/StaticMapTest.php

@@ -2,6 +2,7 @@
 
 namespace Drupal\Tests\migrate\Unit\process;
 
+use Drupal\Component\Utility\Variable;
 use Drupal\migrate\MigrateException;
 use Drupal\migrate\MigrateSkipRowException;
 use Drupal\migrate\Plugin\migrate\process\StaticMap;
@@ -50,7 +51,7 @@ public function testMapwithEmptySource() {
    * Tests when the source is invalid.
    */
   public function testMapwithInvalidSource() {
-    $this->setExpectedException(MigrateSkipRowException::class);
+    $this->setExpectedException(MigrateSkipRowException::class, sprintf("No static mapping found for '%s' and no default value provided for destination '%s'.", Variable::export(['bar']), 'destinationproperty'));
     $this->plugin->transform(['bar'], $this->migrateExecutable, $this->row, 'destinationproperty');
   }