Merge branch 'master' of https://github.com/tsdogs/yii2-user

Author: Alessandro Briosi

migrations/Migration.php

@@ -107,6 +107,37 @@ public function dropColumnConstraints($table, $column)
         }
     }
 
+    /*
+     *  Drops contratints referencing the Table
+     */
+    public function dropTableConstraints($table)
+    {
+        $table = Yii::$app->db->schema->getRawTableName($table);
+        $cmd = Yii::$app->db->createCommand('SELECT name, OBJECT_NAME(parent_object_id) as tbl FROM sys.foreign_keys
+                                WHERE referenced_object_id = object_id(:table)',
+                                [ ':table' => $table ]);
+        $constraints = $cmd->queryAll();
+        foreach ($constraints as $c) {
+            echo 'Dropping constrain: '.$c['name']."\n";
+            $this->execute('ALTER TABLE '.Yii::$app->db->quoteTableName($c['tbl']).' DROP CONSTRAINT '.Yii::$app->db->quoteColumnName($c['name']));
+        }
+        
+        // checking for indexes
+        $cmd = Yii::$app->db->createCommand('SELECT ind.name FROM sys.indexes ind
+                                                INNER JOIN sys.index_columns ic 
+                                                    ON  ind.object_id = ic.object_id and ind.index_id = ic.index_id 
+                                                INNER JOIN sys.columns col 
+                                                    ON ic.object_id = col.object_id and ic.column_id = col.column_id 
+                                                WHERE ind.object_id = object_id(:table)
+                                                AND col.name = :column',
+                                [ ':table' => $table, ':column' => $column ]);
+                                
+        $indexes = $cmd->queryAll();
+        foreach ($indexes as $i) {
+            $this->dropIndex($i['name'],$table);
+        }
+    }
+    
     /*
      *  Drops contratints referencing the Table
      */