Merge pull request #212 from sdepablos/master

Fix dropping foreign key multiple times with test

lib/Doctrine/DBAL/Schema/Comparator.php

@@ -95,6 +95,18 @@ class Comparator
         foreach ($diff->removedTables as $tableName => $table) {
             if (isset($foreignKeysToTable[$tableName])) {
                 $diff->orphanedForeignKeys = array_merge($diff->orphanedForeignKeys, $foreignKeysToTable[$tableName]);
+
+                // deleting duplicated foreign keys present on both on the orphanedForeignKey
+                // and the removedForeignKeys from changedTables
+                foreach ($foreignKeysToTable[$tableName] as $foreignKey) {
+                    // strtolower the table name to make if compatible with getShortestName
+                    $localTableName = strtolower($foreignKey->getLocalTableName());
+                    if (isset($diff->changedTables[$localTableName])) {
+                        foreach ($diff->changedTables[$localTableName]->removedForeignKeys as $key => $removedForeignKey) {
+                            unset($diff->changedTables[$localTableName]->removedForeignKeys[$key]);
+                        }
+                    }
+                }
             }
         }
 

tests/Doctrine/Tests/DBAL/Schema/ComparatorTest.php

@@ -781,6 +781,36 @@ class ComparatorTest extends \PHPUnit_Framework_TestCase
         $this->assertCount(0, $diff->removedSequences);
     }
 
+
+    /**
+     * You can get multiple drops for a FK when a table referenced by a foreign
+     * key is deleted, as this FK is referenced twice, once on the orphanedForeignKeys
+     * array because of the dropped table, and once on changedTables array. We
+     * now check that the key is present once.
+     */
+    public function testAvoidMultipleDropForeignKey()
+    {
+        $oldSchema = new Schema();
+
+        $tableForeign = $oldSchema->createTable('foreign');
+        $tableForeign->addColumn('id', 'integer');
+
+        $table = $oldSchema->createTable('foo');
+        $table->addColumn('fk', 'integer');
+        $table->addForeignKeyConstraint($tableForeign, array('fk'), array('id'));
+
+
+        $newSchema = new Schema();
+        $table = $newSchema->createTable('foo');
+
+        $c = new Comparator();
+        $diff = $c->compare($oldSchema, $newSchema);
+
+        $this->assertCount(0, $diff->changedTables['foo']->removedForeignKeys);
+        $this->assertCount(1, $diff->orphanedForeignKeys);
+    }
+
+
     /**
      * @param SchemaDiff $diff
      * @param int $newTableCount