FIX for #4417: Ensuring ->removeValidation() is defined on instances of Validator. Setup new API for enabling/disabling validation. Documentation and better type handling.

src/Forms/RequiredFields.php

@@ -48,6 +48,7 @@ class RequiredFields extends Validator
      */
     public function removeValidation()
     {
+        parent::removeValidation();
         $this->required = array();
 
         return $this;

src/Forms/Validator.php

@@ -29,6 +29,11 @@ abstract class Validator extends Object
      */
     protected $result;
 
+    /**
+     * @var bool
+     */
+    private $enabled = true;
+
     /**
      * @param Form $form
      * @return $this
@@ -47,7 +52,9 @@ abstract class Validator extends Object
     public function validate()
     {
         $this->resetResult();
-        $this->php($this->form->getData());
+        if ($this->getEnabled()) {
+            $this->php($this->form->getData());
+        }
         return $this->result;
     }
 
@@ -129,6 +136,34 @@ abstract class Validator extends Object
      */
     abstract public function php($data);
 
+    /**
+     * @param bool $enabled
+     * @return $this
+     */
+    public function setEnabled($enabled)
+    {
+        $this->enabled = (bool)$enabled;
+        return $this;
+    }
+
+    /**
+     * @return bool
+     */
+    public function getEnabled()
+    {
+        return $this->enabled;
+    }
+
+    /**
+     * @return $this
+     */
+    public function removeValidation()
+    {
+        $this->setEnabled(false);
+        $this->resetResult();
+        return $this;
+    }
+
     /**
      * Clear current result
      *

tests/php/Forms/ValidatorTest.php

@@ -0,0 +1,58 @@
+<?php
+
+namespace SilverStripe\Forms\Tests;
+
+use SilverStripe\Control\Controller;
+use SilverStripe\Dev\SapphireTest;
+use SilverStripe\Forms\FieldList;
+use SilverStripe\Forms\Form;
+use SilverStripe\Forms\Tests\ValidatorTest\TestValidator;
+use SilverStripe\Forms\TextField;
+
+/**
+ * @package framework
+ * @subpackage tests
+ */
+class ValidatorTest extends SapphireTest
+{
+
+    /**
+     * Common method for setting up form, since that will always be a dependency for the validator.
+     *
+     * @param    array $fieldNames
+     * @return    Form
+     */
+    protected function getForm(array $fieldNames = array())
+    {
+        // Setup field list now. We're only worried about names right now.
+        $fieldList = new FieldList();
+        foreach ($fieldNames as $name) {
+            $fieldList->add(new TextField($name));
+        }
+
+        return new Form(new Controller(), "testForm", $fieldList, new FieldList([/* no actions */]));
+    }
+
+
+    public function testRemoveValidation()
+    {
+        $validator = new TestValidator();
+
+        // Setup a form with the fields/data we're testing (a form is a dependency for validation right now).
+        $data = array("foobar" => "");
+        $form = $this->getForm(array_keys($data)); // We only care right now about the fields we've got setup in this array.
+        $form->disableSecurityToken();
+        $form->setValidator($validator); // Setup validator now that we've got our form.
+        $form->loadDataFrom($data); // Put data into the form so the validator can pull it back out again.
+
+        $result = $form->validationResult();
+        $this->assertFalse($result->isValid());
+        $this->assertCount(1, $result->getMessages());
+
+        // Make sure it doesn't fail after removing validation AND has no errors (since calling validate should reset errors).
+        $validator->removeValidation();
+        $result = $form->validationResult();
+        $this->assertTrue($result->isValid());
+        $this->assertEmpty($result->getMessages());
+    }
+}

tests/php/Forms/ValidatorTest/TestValidator.php

@@ -0,0 +1,23 @@
+<?php
+
+namespace SilverStripe\Forms\Tests\ValidatorTest;
+
+use SilverStripe\Dev\TestOnly;
+use SilverStripe\Forms\Validator;
+
+class TestValidator extends Validator implements TestOnly
+{
+
+    /**
+     * Requires a specific field for test purposes.
+     *
+     * @param array $data
+     * @return null
+     */
+    public function php($data)
+    {
+        foreach ($data as $field => $data) {
+            $this->validationError($field, 'error');
+        }
+    }
+}