Try to use the getRelatedByName() method first

Then using the `findMessages()` method, tries to use the method
`getRelatedByName()` before using the `findRelated()` method.

This change was made because since on `KeyNested` rule you may have
names with '.' we'll never get the proper exception using
`findRelated()`.

library/Exceptions/NestedValidationException.php

@@ -68,7 +68,9 @@ class NestedValidationException extends ValidationException implements IteratorA
             $numericKey = is_numeric($key);
             $path = $numericKey ? $value : $key;
 
-            $exception = $this->findRelated($path);
+            if (!($exception = $this->getRelatedByName($path))) {
+                $exception = $this->findRelated($path);
+            }
 
             $path = str_replace('.', '_', $path);
 

tests/integration/issue-689.phpt

@@ -0,0 +1,57 @@
+--FILE--
+<?php
+
+require 'vendor/autoload.php';
+
+use Respect\Validation\Exceptions\NestedValidationException;
+use Respect\Validation\Validator as v;
+
+$input = [
+    'organization' => [
+        'name' => 'N',
+        'address' => 'A',
+    ],
+    'contact' => [
+        'name' => 'wd',
+        'email' => 'ffesfewf2232313123212',
+        'password' => ' ',
+        'position' => 'wdwdwf',
+        'number' => '£"!@£;21#£:"!:£~!":£\'21;',
+    ],
+];
+
+try {
+    v::create()
+        ->key(
+            'organization',
+            v::create()
+                ->key('name', v::length(2, 50)->notEmpty())
+                ->key('address', v::length(2, 50)->notEmpty())
+        )
+        ->keyNested('contact.name', v::length(1, 50)->notEmpty())
+        ->keyNested('contact.email', v::email()->notEmpty())
+        ->keyNested('contact.password', v::length(3, 100)->notEmpty())
+        ->keyNested('contact.position', v::length(1, 100)->notEmpty())
+        ->keyNested('contact.number', v::phone()->notEmpty())
+        ->assert($input);
+} catch (NestedValidationException $exception) {
+    print_r(array_filter($exception->findMessages([
+        'organization.name' => 'Center name',
+        'organization.address' => 'Center address',
+        'contact.name' => 'Contact name',
+        'contact.password' => 'Contact name',
+        'contact.position' => 'Contact name',
+        'contact.number' => 'Contact name',
+        'contact.email' => 'Contact name',
+    ])));
+}
+?>
+--EXPECTF--
+Array
+(
+    [organization_name] => Center name
+    [organization_address] => Center address
+    [contact_password] => Contact name
+    [contact_number] => Contact name
+    [contact_email] => Contact name
+)