Merge pull request #20 from robertpustulka/only-dirty

Added support for versioning only dirty properties.

Author: josegonzalez

README.md

@@ -228,3 +228,4 @@ There are three behavior configurations that may be used:
 - `versionTable`: (Default: `version`) The name of the table to be used to store versioned data. It may be useful to use a different table when versioning multiple types of entities.
 - `versionField`: (Default: `version_id`) The name of the field in the versioned table that will store the current version. If missing, the plugin will continue to work as normal.
 - `referenceName`: (Default: db table name) Discriminator used to identify records in the version table.
+- `onlyDirty`: (Default: false) Set to true to version only dirty properties.

src/Model/Behavior/VersionBehavior.php

@@ -59,7 +59,8 @@ class VersionBehavior extends Behavior
         'versionField' => 'version_id',
         'fields' => null,
         'foreignKey' => 'foreign_key',
-        'referenceName' => null
+        'referenceName' => null,
+        'onlyDirty' => false
     ];
 
     /**
@@ -161,7 +162,7 @@ public function beforeSave(Event $event, Entity $entity, ArrayObject $options)
         $options['associated'] = $newOptions + $options['associated'];
 
         $fields = $this->_fields();
-        $values = $entity->extract($fields);
+        $values = $entity->extract($fields, $this->_config['onlyDirty']);
 
         $model = $this->_config['referenceName'];
         $primaryKey = (array)$this->_table->primaryKey();

tests/TestCase/Model/Behavior/VersionBehaviorTest.php

@@ -131,6 +131,29 @@ public function testSaveLimitFields()
         $this->assertEquals('title', $results[0]['field']);
     }
 
+    public function testSaveDirtyFields()
+    {
+        $table = TableRegistry::get('Articles', [
+            'entityClass' => 'Josegonzalez\Version\Test\TestCase\Model\Behavior\TestEntity'
+        ]);
+        $table->addBehavior('Josegonzalez/Version.Version', ['onlyDirty' => true]);
+        $article = $table->find('all')->first();
+
+        $article->title = 'Titulo';
+        $article->body = 'Hello world!';
+        $table->save($article);
+
+        $versionTable = TableRegistry::get('Version');
+        $results = $versionTable->find('all')
+                                ->where(['foreign_key' => $article->id, 'version_id' => 3])
+                                ->hydrate(false)
+                                ->toArray();
+
+        $this->assertCount(2, $results);
+        $this->assertEquals('title', $results[0]['field']);
+        $this->assertEquals('body', $results[1]['field']);
+    }
+
     public function testFindVersionLimitFields()
     {
         $table = TableRegistry::get('Articles', [