From e18dc1fc7d8dda5e257ab911b121d41cd8fc8efa Mon Sep 17 00:00:00 2001
From: Kristen Gilden <kristen.gilden@gmail.com>
Date: Fri, 24 Oct 2014 21:57:29 +0300
Subject: [PATCH 1/2] [Form] Document CollectionType's `prototype_data`

---
 reference/forms/types/collection.rst | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/reference/forms/types/collection.rst b/reference/forms/types/collection.rst
index c9e237181b3..e3c9fece9c1 100644
--- a/reference/forms/types/collection.rst
+++ b/reference/forms/types/collection.rst
@@ -20,6 +20,7 @@ photos).
 |             | - `entry_options`_                                                          |
 |             | - `entry_type`_                                                             |
 |             | - `prototype`_                                                              |
+|             | - `prototype_data`_                                                         |
 |             | - `prototype_name`_                                                         |
 +-------------+-----------------------------------------------------------------------------+
 | Inherited   | - `by_reference`_                                                           |
@@ -363,6 +364,14 @@ rendering your form, having the entire "form row" may be easier for you.
 For details on how to actually use this option, see the above example as
 well as :ref:`cookbook-form-collections-new-prototype`.
 
+prototype_data
+~~~~~~~~~~~~~~
+
+**type**: ``mixed`` **default**: ``null``
+
+Allows you to specify data for the prototype. Each new row added will initially
+contain the data set by this option.
+
 prototype_name
 ~~~~~~~~~~~~~~
 

From 95bda572d77461edabb87c4ee12a91ac8b8461ea Mon Sep 17 00:00:00 2001
From: Jules Pietri <heah@heahprod.com>
Date: Sat, 9 Apr 2016 13:47:25 +0200
Subject: [PATCH 2/2] [Form] defined default and added example CollectionType
 `prototype_data` option

---
 reference/forms/types/collection.rst | 21 +++++++++++++++++++--
 1 file changed, 19 insertions(+), 2 deletions(-)

diff --git a/reference/forms/types/collection.rst b/reference/forms/types/collection.rst
index e3c9fece9c1..28d0fce9422 100644
--- a/reference/forms/types/collection.rst
+++ b/reference/forms/types/collection.rst
@@ -367,10 +367,27 @@ well as :ref:`cookbook-form-collections-new-prototype`.
 prototype_data
 ~~~~~~~~~~~~~~
 
+.. versionadded:: 2.8
+    The ``prototype_data`` option was introduced in Symfony 2.8.
+
 **type**: ``mixed`` **default**: ``null``
 
-Allows you to specify data for the prototype. Each new row added will initially
-contain the data set by this option.
+Allows you to define specific data for the prototype. Each new row added will
+initially contain the data set by this option. By default, the data configured
+for all entries with the ``entry_options`` option will be used.
+
+.. code-block:: php
+
+    use Symfony\Component\Form\Extension\Core\Type\CollectionType;
+    use Symfony\Component\Form\Extension\Core\Type\TextType;
+    // ...
+
+    $builder->add('tags', CollectionType::class, array(
+        'entry_type' => TextType::class,
+        'allow_add' => true,
+        'prototype' => true,
+        'prototype_data' => 'New Tag Placeholder',
+    ));
 
 prototype_name
 ~~~~~~~~~~~~~~