fixed bug

catch/permissions/database/migrations/20200409023815_change_permissions.php

@@ -28,6 +28,7 @@ class ChangePermissions extends Migrator
      */
     public function change()
     {
+        if ($this->hasTable('permissions')) {
             $table = $this->table('permissions');
 
             $table->addColumn('component', 'string', ['default' => '', 'comment' => '组件名称', 'limit' => '255', 'after' => 'permission_mark'])
@@ -37,3 +38,4 @@ class ChangePermissions extends Migrator
                 ->update();
         }
     }
+}

catch/permissions/database/migrations/20200422080926_permissions_add_column.php

@@ -28,9 +28,11 @@ class PermissionsAddColumn extends Migrator
      */
     public function change()
     {
+        if ($this->hasTable('permissions')) {
             $table = $this->table('permissions');
 
             $table->addColumn('level', 'string', ['default' => '', 'comment' => '层级', 'limit' => '50', 'after' => 'parent_id'])
                 ->update();
         }
     }
+}