Added support for ArrayContext

Author: jeremyharris

src/Validation/Validator.php

@@ -30,6 +30,20 @@
  */
 class Validator implements ArrayAccess, IteratorAggregate, Countable
 {
+    /**
+     * Default empty message
+     *
+     * @var string
+     */
+    const DEFAULT_EMPTY_MESSAGE = 'This field cannot be left empty';
+
+    /**
+     * Default required message
+     *
+     * @var string
+     */
+    const DEFAULT_REQUIRED_MESSAGE = 'This field is required';
+
     /**
      * Used to flag nested rules created with addNested() and addNestedMany()
      *
@@ -1937,9 +1951,9 @@ public function regex($field, $regex, $message = null, $when = null)
      */
     public function getRequiredMessage($field)
     {
-        $defaultMessage = 'This field is required';
+        $defaultMessage = static::DEFAULT_REQUIRED_MESSAGE;
         if ($this->_useI18n) {
-            $defaultMessage = __d('cake', 'This field is required');
+            $defaultMessage = __d('cake', $defaultMessage);
         }
 
         return isset($this->_presenceMessages[$field])
@@ -1955,9 +1969,9 @@ public function getRequiredMessage($field)
      */
     public function getEmptyMessage($field)
     {
-        $defaultMessage = 'This field cannot be left empty';
+        $defaultMessage = static::DEFAULT_EMPTY_MESSAGE;
         if ($this->_useI18n) {
-            $defaultMessage = __d('cake', 'This field cannot be left empty');
+            $defaultMessage = __d('cake', $defaultMessage);
         }
 
         return isset($this->_allowEmptyMessages[$field])

src/View/Form/ArrayContext.php

@@ -16,6 +16,7 @@
 
 use Cake\Http\ServerRequest;
 use Cake\Utility\Hash;
+use Cake\Validation\Validator;
 
 /**
  * Provides a basic array based context provider for FormHelper.
@@ -29,7 +30,8 @@
  *   will be used when there is no request data set. Data should be nested following
  *   the dot separated paths you access your fields with.
  * - `required` A nested array of fields, relationships and boolean
- *   flags to indicate a field is required.
+ *   flags to indicate a field is required. The value can also be a string to be used
+ *   as the required error message
  * - `schema` An array of data that emulate the column structures that
  *   Cake\Database\Schema\Schema uses. This array allows you to control
  *   the inferred type for fields and allows auto generation of attributes
@@ -53,7 +55,12 @@
  *    'defaults' => [
  *      'id' => 1,
  *      'title' => 'First post!',
- *    ]
+ *    ],
+ *    'required' => [
+ *      'id' => true, // will use default required message
+ *      'title' => 'Please enter a title',
+ *      'body' => false,
+ *    ],
  *  ];
  *  ```
  */
@@ -194,24 +201,36 @@ public function val($field, $options = [])
      * @return bool
      */
     public function isRequired($field)
+    {
+        return (bool)$this->getRequiredMessage($field);
+    }
+
+    /**
+     * {@inheritDoc}
+     */
+    public function getRequiredMessage($field)
     {
         if (!is_array($this->_context['required'])) {
-            return false;
+            return null;
         }
         $required = Hash::get($this->_context['required'], $field);
         if ($required === null) {
             $required = Hash::get($this->_context['required'], $this->stripNesting($field));
         }
 
-        return (bool)$required;
-    }
+        if ($required === false) {
+            return null;
+        }
 
-    /**
-     * {@inheritDoc}
-     */
-    public function getRequiredMessage($field)
-    {
-        return null;
+        if ($required === true) {
+            $required = Validator::DEFAULT_REQUIRED_MESSAGE;
+
+            if (function_exists('__d ')) {
+                $required = __d('cake', $required);
+            }
+        }
+
+        return $required;
     }
 
     /**

tests/TestCase/View/Form/ArrayContextTest.php

@@ -35,6 +35,23 @@ public function setUp()
         $this->request = new ServerRequest();
     }
 
+    public function testGetRequiredMessage()
+    {
+        $context = new ArrayContext($this->request, [
+            'required' => [
+                'Comments' => [
+                    'required' => 'My custom message',
+                    'nope' => false,
+                    'tags' => true
+                ]
+            ]
+        ]);
+
+        $this->assertSame('My custom message', $context->getRequiredMessage('Comments.required'));
+        $this->assertSame('This field is required', $context->getRequiredMessage('Comments.tags'));
+        $this->assertSame(null, $context->getRequiredMessage('Comments.nope'));
+    }
+
     /**
      * Test getting the primary key.
      *