我在使用contain来限制数据时遇到了奇怪的错误。以下是我的contain代码：
$this->Movie->contain(array(
'Review' => array(
'fields' => array('id', 'title', 'spoilers', 'body', 'created'),
'User' => array(
'fields' => array('id', 'username'),
'Profile' => array('fields' => array('id', 'image_thumb_small'))
),
'order' => 'Review.created DESC',
'limit' => 2,
),
'Movieupdates' => array(
'User' => array('Profile' => array('fields' => 'image_thumb_small')),
'order' => 'Movieupdates.created DESC',
'limit' => 2
),
'Actor' => array(
'fields' => array('name', 'slug', 'image_thumb'),
),
'Genre' => array(
'fields' => array('name', 'id'),
)
));
问题在于Cakephp给我抛出了两个错误：
Warning (2): array_merge() [function.array-merge]: Argument #1 is not an array [CORE\Cake\Model\Behavior\ContainableBehavior.php, line 400]
Warning (2): array_unique() expects parameter 1 to be array, null given [CORE\Cake\Model\Behavior\ContainableBehavior.php, line 400]
我认为问题与以下这行代码有关（在contain: Review -> User中）：
'fields' => array('id', 'username'),
如果我删除它，一切都很好，但是我不想要用户的所有数据，特别是密码，所以我必须限制它。
我的Contain有什么问题？错误建议我应该在某个地方使用数组，但我不知道在哪里。 编辑添加查询结果
Array
(
[Movie] => Array
(
[id] => 27
[user_id] =>
[title] => The Amazing Spider-Man
[slug] => The_Amazing_Spider_Man_2012
[year] => 2012
[summary] => Peter Parker finds a clue that might help him understand why his parents disappeared when he was young.
[poster] => /files/movies/53cb8be658a2e04a21909e288cdcb8.jpg
[poster_thumb] => /files/movies/53cb8be658a2e04a21909e288cdcb8_resized_101x150.jpg
[backdrop] => /files/movies/backdrop/amazing_spider_man.jpg
[rating] => 7.4285714285715
[like_count] => 5
[review_count] => 7
[see_count] => 7
[rating_count] => 14
)
[Movieupdates] => Array
(
[0] => Array
(
[id] => 20
[user_id] => 4
[movie_id] => 27
[type] => 4
[info] => 26
[created] => 2012-12-08 11:06:18
[User] => Array
(
[id] => 4
[username] => Ceriksen
[email] => skdji@gmail.com
[password] => ---
[validation_code] => 082b7735cfb3a3d5c74547d702bd97f9af517870
[group_id] => 3
[created] => 2012-11-27 11:23:57
[modified] => 2012-11-27 11:23:57
[Profile] => Array
(
[id] => 5
[user_id] => 4
[image] => /files/profiles/771a98602dc7849b2d004952f1f35f.jpg
[image_thumb] => /files/profiles/771a98602dc7849b2d004952f1f35f_resized_130x130-2.jpg
[image_thumb_medium] =>
[image_thumb_small] => /files/profiles/771a98602dc7849b2d004952f1f35f_resized_30x30.jpg
[name] =>
[last_name] =>
[bio] =>
[country] =>
[city] =>
)
)
)
[1] => Array
(
[id] => 19
[user_id] => 4
[movie_id] => 27
[type] => 3
[info] => 10
[created] => 2012-12-08 11:06:08
[User] => Array
(
[id] => 4
[username] => Ceriksen
[email] => skdji@gmail.com
[password] => ---
[validation_code] => 082b7735cfb3a3d5c74547d702bd97f9af517870
[group_id] => 3
[created] => 2012-11-27 11:23:57
[modified] => 2012-11-27 11:23:57
[Profile] => Array
(
[id] => 5
[user_id] => 4
[image] => /files/profiles/771a98602dc7849b2d004952f1f35f.jpg
[image_thumb] => /files/profiles/771a98602dc7849b2d004952f1f35f_resized_130x130-2.jpg
[image_thumb_medium] =>
[image_thumb_small] => /files/profiles/771a98602dc7849b2d004952f1f35f_resized_30x30.jpg
[name] =>
[last_name] =>
[bio] =>
[country] =>
[city] =>
)
)
)
)
[Genre] => Array
(
[0] => Array
(
[name] => Action
[id] => 11
[MoviesGenre] => Array
(
[id] => 56
[movie_id] => 27
[genre_id] => 11
)
)
[1] => Array
(
[name] => Adventure
[id] => 12
[MoviesGenre] => Array
(
[id] => 57
[movie_id] => 27
[genre_id] => 12
)
)
[2] => Array
(
[name] => Fantasy
[id] => 18
[MoviesGenre] => Array
(
[id] => 58
[movie_id] => 27
[genre_id] => 18
)
)
)
[Actor] => Array
(
[0] => Array
(
[name] => Emma
[slug] => Emma_Stone
[image_thumb] => /files/actors/d59efc7614151acb7ea5d08da47112_resized_30x30.jpg
[MoviesActor] => Array
(
[id] => 1
[movie_id] => 27
[actor_id] => 8
)
)
[1] => Array
(
[name] => Andrew
[slug] => Andrew_Garfield
[image_thumb] => /files/actors/0a9354d741328f4cf3e2954641e4eb_resized_25x30.jpg
[MoviesActor] => Array
(
[id] => 2
[movie_id] => 27
[actor_id] => 9
)
)
[2] => Array
(
[name] => Martin
[slug] => Martin_Sheen
[image_thumb] => /files/actors/2383fc87054b2e8b4249fc7e3ffba5_resized_30x27.jpg
[MoviesActor] => Array
(
[id] => 3
[movie_id] => 27
[actor_id] => 10
)
)
)
[Review] => Array
(
[0] => Array
(
[id] => 26
[title] => W00t
[spoilers] => 0
[created] => 2012-12-08 11:06:18
[user_id] => 4
[MoviesReview] => Array
(
[id] => 25
[movie_id] => 27
[review_id] => 26
)
[User] => Array
(
[id] => 4
[username] => Ceriksen
[Profile] => Array
(
[id] => 5
[user_id] => 4
[image] => /files/profiles/771a98602dc7849b2d004952f1f35f.jpg
[image_thumb] => /files/profiles/771a98602dc7849b2d004952f1f35f_resized_130x130-2.jpg
[image_thumb_medium] =>
[image_thumb_small] => /files/profiles/771a98602dc7849b2d004952f1f35f_resized_30x30.jpg
[name] =>
[last_name] =>
[bio] =>
[country] =>
[city] =>
)
)
)
[1] => Array
(
[id] => 25
[title] => Testing the update
[spoilers] => 1
[created] => 2012-12-08 11:04:44
[user_id] => 4
[MoviesReview] => Array
(
[id] => 24
[movie_id] => 27
[review_id] => 25
)
[User] => Array
(
[id] => 4
[username] => Ceriksen
[Profile] => Array
(
[id] => 5
[user_id] => 4
[image] => /files/profiles/771a98602dc7849b2d004952f1f35f.jpg
[image_thumb] => /files/profiles/771a98602dc7849b2d004952f1f35f_resized_130x130-2.jpg
[image_thumb_medium] =>
[image_thumb_small] => /files/profiles/771a98602dc7849b2d004952f1f35f_resized_30x30.jpg
[name] =>
[last_name] =>
[bio] =>
[country] =>
[city] =>
)
)
)
)
)
'fields' => array('User.id', 'User.username')。 - Tim Joyce