From 6b74472bd2e13afa23f082531d8f3ddcc7600a35 Mon Sep 17 00:00:00 2001
From: Angel Guevara <angeldelcaos@gmail.com>
Date: Sun, 14 Jun 2015 11:35:11 -0500
Subject: [PATCH] Generate 'exist' rules based on foreign keys

---
 generators/model/Generator.php | 13 +++++++++++++
 1 file changed, 13 insertions(+)

diff --git a/generators/model/Generator.php b/generators/model/Generator.php
index 00da5ffbb..8adc71004 100644
--- a/generators/model/Generator.php
+++ b/generators/model/Generator.php
@@ -317,6 +317,19 @@ public function generateRules($table)
             // doesn't support unique indexes information...do nothing
         }
 
+        // Exist rules for foreign keys.
+        foreach ($table->foreignKeys as $refs) {
+            $refClassName = $this->generateClassName($refs[0]);
+            unset($refs[0]);
+            $rules[] = "[['" . implode("', '", array_keys($refs)) . "'], "
+                . "'exist', "
+                . "'skipOnError' => true, "
+                . "'targetClass' => $refClassName::className(), "
+                . "'targetAttributes' => ['"
+                    . implode("', '", array_values($refs))
+                . "']],";
+        }
+
         return $rules;
     }