Basically I have following models in CakePHP:
User(id, username)
Photo(id, user_id, path)
I have set up following relation: User hasMany Photo.
On one screen, I would like to list users, and show random photo next to each user. I tried setting up following relation:
User hasOne SamplePhoto (where SamplePhoto is just Photo model)
but when user has two photos for instance, he is listed twice on the list.
basically my question is: can you reduce hasMany relation to hasOne, without adding any fields to table schema presented above? I would like to tell cake - find the first record in the Photo table which matches a certain user_id.
You could also use the Containable behaviour and then set up something like:
$this->User->find(
'all',
array(
'contains' => array(
'Photo' => array(
'order' => 'rand()',
'limit' => 1
)
)
)
);
You should then get something like
Array
(
[User] => Array
(
[id] => 121
[username] => tom
)
[Photo] => Array
(
[0] => Array
(
[id] => 123
[user_id] => 121
[path] => Somewhere
)
)
)
if you do a find like $this->User->read(null,$id), the return will be an array that looks something like:
Array
(
[User] => Array
(
[id] => 121
[username] => tom
)
[Photo] => Array
(
[0] => Array
(
[id] => 123
[user_id] => 121
[path] => Somewhere
)
[1] => Array
(
[id] => 124
[user_id] => 121
[path] => SomeOtherPlace
)
)
)
From this array you can pick the photo however you like, be it the first:
$this->data['Photo'][0]
the last:
$this->data['Photo'][count($this->data['Photo'])]
an explicit record:
$this->data['Photo'][3]
or by some random means:
$this->data['Photo'][$rnd]
Don't make this more complicated than it needs to be. :)
$data = $this->User->Photo->find('first',
array('conditions' => array('Photo.user_id' => $id)));
Gives you a photo in $data['Photo'] with the user attached in $data['User'].
You'd do something like:
$user = $this->User->find('first', array('conditions' =>
array('username'=>$this->data['User']['username'],
'active'=>true) ));
Related
I have simple model relationship in CakePHP 1.3 with Categories -> Products
Category hasMany Products
There is slight difference between the data arrays which I get in the different controllers. The Product data is in the main product array when getting as associated model in the Categories controller and is separated when getting it in Products.
For Example to get 'Product1'
in Categories - $category['Product'][0]['title']
and in Products - $product[0]['Product']['title']
I would like to use same element for displaying the products. It does not matter which array scheme will be used just to be the same. And where is the right place to make the modification? I can modify those arrays after getting them, but don't think that it is the best option.
When I am in the Categories controller and get a category I get this:
// $this->Category->findById('12');
Array
(
[ProductCategory] => Array
(
[id] => 12
[title] => Category 1
[updated] => 2013-02-24 10:06:15
[created] => 2013-02-24 10:06:15
)
[Product] => Array
(
[0] => Array
(
[id] => 4
[parent_id] => 12
[title] => Product1
[updated] => 2013-02-24 10:17:01
[created] => 2013-02-24 09:12:59
)
[1] => Array
(
[id] => 6
[parent_id] => 12
[title] => Product2
[updated] => 2013-02-24 10:16:54
[created] => 2013-02-24 09:13:53
)
)
And when getting all the products inside the Products controller:
// $this->Product->find('all');
Array
(
[0] => Array
(
[Product] => Array
(
[id] => 10
[parent_id] => 12
[title] => Product1
[updated] => 2013-02-24 10:16:42
[created] => 2013-02-24 09:16:35
)
)
[1] => Array
(
[Product] => Array
(
[id] => 8
[parent_id] => 12
[title] => Product2
[updated] => 2013-02-24 10:16:47
[created] => 2013-02-24 09:15:39
)
)
)
)
One of your finds is a find('all') and the other is a findById() (which uses find('first')).
Both of these return data in a different format, since find('first') knows you only want one item, and find('all') is an unknown set of item(s).
Just use find('all') for both, but set your limit based on whether you need only one or more than one. Then, your data will be returned exactly the same.
Which Controller you retrieve your data from has no effect on the data returned. Which MODEL however, does - so just make sure you're doing your find from the same model.
Eg.
//in your ProductsController
$this->Product->find('all');
//in your CategoriesController
$this->Category->Product->find('all');
// in some other controller
$this->loadModel('Product);
$this->Product->find('all');
PS - BUT it's better if you don't do your "finds" in your Controller - make a method in your Model, and call it from your Controller(s) so instead of $this->Product->find(), it would be $this->Product->getProducts() (or whatever you want to call it). (read more about "fat models, skinny controllers" for reasons/examples...etc).
Dave is right, the difference is the method you're using... Even though you claim that associated data is always merged, your find on the 'Product' model is NOT associated data, so the format WILL always be different.
I've been here for a short while and I've already noticed that Dave knows his stuff. :)
I agree with the fat models/skinny controllers paradigm for clean, efficient code.
If you changed:
<?php
$this->Category->contain(array(
'Product'
));
$this->Category->find('all',
array(
'conditions' => array(
'Category.id' => $id // 12 for your OP.
),
'limit' => 1
)
);
?>
Should give you:
<?php
array
(
[0] => array
(
'Category' => array
(
[id] => 12
[title] => Category 1
[updated] => 2013-02-24 10:06:15
[created] => 2013-02-24 10:06:15
),
'Product' => array
(
[0] => array
(
...
),
[1] => array
(
...
)
)
)
)
?>
Please correct me if I am mistaken, thanks!
Or if you want "Products" to look like:
<?php
'Product' => array
(
[0] => array
(
'Product' => array
(
...
)
)
)
?>
when fetching data from the category model, you would need to fetch the associated data manually, e.g.:
<?php
$this->Category->contain();
$cats = $this->Category->find('all');
foreach ($cats as &$cat) {
$this->Category->Product->contain(); // You have to contain for each find.
$cat['Product'] = $this->Category->Product->find('all',
array(
'conditions' => array(
'Product.category_id' => $cat['Category']['id']
)
)
);
}
?>
From the CakePHP manual:
Let's say you had a belongsTo relationship between Posts and Authors. Let's say you wanted to find all the posts that contained a certain keyword ("magic") or were created in the past two weeks, but you want to restrict your search to posts written by Bob:
array (
"Author.name" => "Bob",
"OR" => array (
"Post.title LIKE" => "%magic%",
"Post.created >" => date('Y-m-d', strtotime("-2 weeks"))
)
)
However, its not working for me. I've got Scrapes belongsTo Vargroup, and Vargroup hasMany Scrape. My scrapes table has a field vargroup_id
When I do:
$this->Vargroup->contain('Scrape');
$this->Vargroup->find('first');
I get:
Array
(
[Vargroup] => Array
(
[id] => 16950
[item_id] => 1056
[image] => cn4535d266.jpg
[price] => 22.95
[instock] => 1
[timestamp] => 2012-10-29 11:35:10
)
[Scrape] => Array
(
[0] => Array
(
[id] => 18163
[item_id] => 1056
[vargroup_id] => 16950
[timestamp] => 2012-05-23 15:24:31
[instock] => 1
[price] => 22.95
)
)
)
But when I do :
$this->Vargroup->contain('Scrape');
$this->Vargroup->find('first', array(
'conditions' => array(
'not' => array(
array('Scrape.timestamp >' => $today)
)
)
));
Im getting The following error with associated sql output
Warning (512): SQL Error: 1054: Unknown column 'Scrape.timestamp' in 'where clause'
Query: SELECT `Vargroup`.`id`, `Vargroup`.`item_id`, `Vargroup`.`image`, `Vargroup`.`price`, `Vargroup`.`instock`, `Vargroup`.`timestamp` FROM `vargroups` AS `Vargroup` WHERE `Scrape`.`timestamp` = '2012-10-29
It doesn't look like its binding the table at all..
Any help would be appreciated.
Thanks
Try with this:
$this->Vargroup->contain('Scrape');
$this->Vargroup->find('first', array(
'conditions' => array(
'not' => array(
'Scrape.timestamp >' => array($today)
)
)
));
i think this examples from cakephp page tell the right way to do a "not" condition,
check it out.
array(
"NOT" => array("Post.title" => array("First post", "Second post", "Third post"))
)
this is the complex find conditions page if you have more questions. Cakephp complex find conditions
I have 3 users tables on my DB:
Users
users_twitter
users_web
Users is the parent of both users_twitter and users_web.
And then another table for comments. Both kind of users can comment.
So, when I want to show the comments I need to get information of the author of each comment.
In order to do this I am using the variable $belongsTo on the /Model/Comment.php like this:
public $belongsTo = array(
'users' => array(
'foreignKey' => 'idUser'
)
);
In Controller/CommentController, when i do this:
public function index($idPost) {
$this->Comment->recursive = 0;
return $this->Comment->find('all');
}
I get this kind of array:
[0] => Array
(
[Comment] => Array
(
[id] => 1
[idPost] => 441
[idUser] => 387371023
[comment] => hello word
[created] => 2012-03-01 00:00:00
)
[User] => Array
(
[id] => 1
[username] => myname
)
)
And what I want is to get more info yet, the one of the subtype of Users, depending on the existence of the ID on the subtype tables.
In case it was an id of a user_web table, I would like to get this:
[0] => Array
(
[Comment] => Array
(
[id] => 1
[idPost] => 441
[idUser] => 387371023
[comment] => hello word
[created] => 2012-03-01 00:00:00
)
[User] => Array
(
[id] => 1
[username] => myname
[users_web] => Array
(
[id] => 1
[username] => myName
[password] => XXXXX
[verified] => 1
[created] => 1
)
)
Do you know if that's possible with CakePHP?
As far as I know, with $hasOne I only get one level more, I need two.
In your AppModel add
public $actsAs = array('Containable');
In your index:
public function index($idPost) {
return $this->Comment->find('all', array(
'contain' => array('User.UsersWeb')));
}
Your User model has to be associated with a UsersWeb model to make this work.
See http://book.cakephp.org/2.0/en/core-libraries/behaviors/containable.html#containing-deeper-associations for a complete description.
Also why do you return the data in the controller index? Are you using requestAction for this? And why don't you use pagination? Do you really want to display hundreds of comments on one page?
See http://book.cakephp.org/2.0/en/core-libraries/components/pagination.html
I have a bit more complex system...
I have
users model - hasMany Ads
ads model - hasMany "placads"
placads model - belongsTo Ads and Places
places model - hasMany placads
Now I run query like this:
$this->set(
'ad',
$this->User->Ad->find(
'all',
array(
'conditions' => array('Ad.user_id' => $this->Auth->user('id'))
)
)
);
and I am getting this without "Place" in * mark
[0] => Array
(
[Ad] => Array
(
[id] => 1
[user_id] => 1
[name] => bota
)
[Placad] => Array
(
[0] => Array
(
[id] => 1
[ad_id] => 1
[place_id] => 1
[count] => 10
*[Place] => Array
(
info about place
)*
)
[1] => Array
(
[id] => 2
[ad_id] => 1
[place_id] => 2
[count] => 20
*[Place] => Array
(
info about place
)*
)
)
)
What should I do to get something like I wrote into the * mark?
Thanks in advance!
use recursive:
http://book.cakephp.org/view/1063/recursive
$this->User->Ad->recursive = 2; // before find
alternatively:
$this->User->Ad->find( 'all',
array(
'recursive' => 2,
'conditions' => array('Ad.user_id' => $this->Auth->user('id'))
)
)
number 2 is an example, but should do in your case
2nd alternative:
use Containable
http://book.cakephp.org/view/1323/Containable
I would like to save several records for one model. This would have been done pretty easily with saveAll() if it hadn't been for a problem:
I have a notification form, where I select multiple users from a <select> and two fields, for subject and content respectively. Now, when I output what $this->data contains, I have:
Array([Notification] => Array
(
[user_id] => Array
(
[0] => 4
[1] => 6
)
[subject] => subject
[content] => the-content-here
)
)
I've read on Cake 1.3 book, that in order to save multiple records for a model, you have to have the $this->data something like:
Array([Article] => Array(
[0] => Array
(
[title] => title 1
)
[1] => Array
(
[title] => title 2
)
)
)
So, how do I 'share' the subject and content to all selected users?
First off, this database design needs to be normalized.
It seems to me like a Notification can have many Users related to it. At the same time, a User can have many Notifications. Therefore,
Introduce a join table named users_notifications.
Implement the HABTM Relationship: Notification hasAndBelongsToMany User
In the view, you can simply use the following code to automagically bring up the multi-select form to grab user ids:
echo $this->Form->input('User');
The data that is sent to the controller will be of the form:
Array(
[Notification] => Array
(
[subject] => subject
[content] => contentcontentcontentcontentcontentcontent
),
[User] => Array
(
[User] => Array
(
[0] => 4
[1] => 6
)
)
)
Now, all you have to do is called the saveAll() function instead of save().
$this->Notification->saveAll($this->data);
And that's the Cake way to do it!
Those values have to be repeat like this
Array([Notification] => Array(
[0] => Array
(
[user_id] => 4
[subject] => subjects
[content] => content
)
[1] => Array
(
[user_id] => 6
[subject] => subject
[content] => contents
)
)
)
$this->Notification->saveAll($data['Notification']); // should work
If you don't pass any column value, this cake will just ignore it
You're going to have to massage your form's output to suit Model::saveAll. In your controller:
function action_name()
{
if ($this->data) {
if ($this->Notification->saveMany($this->data)) {
// success! :-)
} else {
// failure :-(
}
}
}
And in your model:
function saveMany($data)
{
$saveable = array('Notification'=>array());
foreach ($data['Notification']['user_id'] as $user_id) {
$saveable['Notification'][] = Set::merge($data['Notification'], array('user_id' => $user_id));
}
return $this->saveAll($saveable);
}
The benefit here is your controller still knows nothing about your model's schema, which it shouldn't.
In fact, you could probably redefine saveAll in your model, which hands off correctly formatted input arrays to parent::saveAll, but handles special cases itself.
There might be a more cakey way of doing this, but I've used this kind of technique: First, change the form so that you get an array like this:
Array(
[Notification] => Array
(
[subject] => subject
[content] => contentcontentcontentcontentcontentcontent
),
[selected_users] => Array
(
[id] => Array
(
[0] => 4
[1] => 6
)
)
)
(Just change the multiselect input's name to selected_users.id)
Then loop through the user ids and save each record individually:
foreach( $this->data[ 'selected_users' ][ 'id' ] as $userId ) {
$this->data[ 'Notification' ][ 'user_id' ] = $userId;
$this->Notification->create(); // initializes a new instance
$this->Notification->save( $this->data );
}