function hierarchical_taxonomy_importer_install in Hierarchical Taxonomy Import 8

{@inherit_doc}

As Foreign keys are not directly supported with Database API, hence adding Foreign key constraint manually.

File

./hierarchical_taxonomy_importer.install, line 58

This file will contain install and uninstall hooks for hierarchical_taxonomy_importer module.

Code

function hierarchical_taxonomy_importer_install() {

  // Query to alter mapping table and add a constraint.
  $query = "ALTER TABLE {hti_term_levels} ADD CONSTRAINT " . "  FOREIGN KEY(tid)" . "  REFERENCES " . "     {taxonomy_term_data}(tid)" . "     ON DELETE CASCADE";
  try {
    \Drupal\Core\Database\Database::getConnection()
      ->query($query);
  } catch (\Exception $ex) {
    print $ex
      ->getMessage();
    exit;
  }
}