Each Comment can be the child of either a Question, a Game, or a User. I designed the table so that it has two fields to manage the relationship, parent_type and parent_id. I do not understand how I would make this relationship work with CakePHP 2.1.. I know it is a belongsTo relationship, but how would I specify the table to which it belongs based on another field in that table?
Comments model
var $belongsTo = array(
'Question' => array('className' => 'Question', 'foreignKey' => 'id'),
'Game' => array('className' => 'Game', 'foreignKey' => 'id'),
'User' => array('className' => 'User', 'foreignKey' => 'id'));
Questions model
var $hasMany = array(
'Comment' => array(
'className' => 'Comment',
'foreignKey' => 'parent_id',
'conditions' => array('Comment.parent_type' => 'question')
)
);
http://book.cakephp.org/2.0/en/models/associations-linking-models-together.html
Related
I'm trying to get only those products which have specific brand and category.
in Product model i used this query
$products = $this->find('all', array(
'joins' => array(
array('table' => 'brands_products',
'alias' => 'BrandsProducts',
'type' => 'INNER',
'conditions' => array(
'BrandsProducts.brand_id' => $brandId,
'BrandsProducts.product_id = Product.id'
)
)
),
'group' => 'Product.id'
));
By using above query i can get only those products which has specific brand id.
Exactly i don't know how to use multiple conditions to get data from 2 HABTM tables.
in my example product HABTM relation with Category and Brands.
$products = $this->find('all', array(
'joins' => array(
array('table' => 'brands_products',
'alias' => 'BrandsProducts',
'type' => 'INNER',
'conditions' => array(
'BrandsProducts.brand_id' => $brandId,
'BrandsProducts.product_id = Product.id'
)
),
array('table' => 'categories_products',
'alias' => 'CategoriesProducts',
'type' => 'INNER',
'conditions' => array(
'CategoriesProducts.category_id' => $categoriesId,
'CategoriesProducts.product_id = Product.id'
)
)
),
'group' => 'Product.id'
));
By using this query i got error in db. SO i'm looking how to write proper query to get only those products where brand and category match.
I have two tables, namely 'Customer' and 'Event'. The relations between these two are as follows:
Event
var $belongsTo = array(
...
'Customer'=>array(
'className' => 'Customer',
'foreignKey' => 'customer_id'
)
);
Customer
var $hasMany = array(
'Event' => array(
'className' => 'Event',
'foreignKey' => 'customer_id',
'dependent' => false,
)
);
Each and every customer record holds a company id as well as currently logged in user. What I would like to achieve is to get all of the events for a day, related only to a particular company, but that is of course not working since the event table does not hold company id. Maybe the following find call will help to understand the issue better:
$conditions = array('company_id'=>CakeSession::read("Auth.User.company_id"), 'date'=>date("Y-m-d", $tomorrow));
$tomorrowsEvents = $this->find('all', array(
'conditions'=>$conditions, 'contain'=>array('User', 'Customer')));
Moreover, a customer belongs to a company and a company has many customers, just as follows:
Customer
var $belongsTo = array(
'Company' => array(
'className' => 'Company',
'foreignKey' => 'company_id',
'dependent' => false,
),
);
Company
var $hasMany = array(
'User' => array(
'className' => 'User',
'foreignKey' => 'company_id',
'dependent' => false
),
'Customer'=>array(
'className' => 'Customer',
'foreignKey' => 'company_id',
'dependent' => false
)
);
Any help is much appreciated.
I would actually do this query "backwards" by doing it from Customer, and using the containable behavior to contain the related Events:
$this->Customer->find('all',
array(
'conditions' => array(
'company_id' => CakeSession::read("Auth.User.company_id")
),
'contain' => array(
'Event' => array(
'conditions' => array(
'Event.date' => date("Y-m-d", $tomorrow)
)
)
)
));
In your case it seems that Events have many companies and companies have many events. This is ideal situation for hasAndBelongsToMany relationship. However, you have to focus on the className and joinTable properties to handle the non convenient naming of the join table customers.
http://book.cakephp.org/2.0/en/models/associations-linking-models-together.html#hasandbelongstomany-habtm
you need to rethink the problem, because a user can be (customer or company) then they have a group or they are in a type of user. then a user belongs to a group or user type, this group can be a client or company .
users belongsto a group
group has many user
users hasmany events
events has many users
You can tell if is customer or company is the type of group that owns
table___group
id ____ category ____ subcategory
1 ____ customer ____ example
2 ____ company ____ example
i want to fetch record form 2 model (Booking and Message), both model don't have any relation.
i try a lot but its not working
i used that code ( http://book.cakephp.org/2.0/en/models/associations-linking-models-together.html#joining-tables )
$options['joins'] = array(
array('table' => 'books_tags',
'alias' => 'BooksTag',
'type' => 'inner',
'conditions' => array(
'Book.id = BooksTag.book_id'
)
),
array('table' => 'tags',
'alias' => 'Tag',
'type' => 'inner',
'conditions' => array(
'BooksTag.tag_id = Tag.id'
)
)
);
$options['conditions'] = array(
'Tag.tag' => 'Novel'
);
$books = $Book->find('all', $options);
Try this:
BookModel:
public $hasMany = array(
'BooksTag' => array(
'foreignKey' => 'book_id'
)
);
TagModel:
public $hasMany = array(
'BooksTag' => array(
'foreignKey' => 'tag_id'
)
);
BooksController:
$this->Book->Behaviors->load('Containable');
$this->Book->find('all', array(
'contain' => array(
'BooksTag' => array(
'Tag',
),
),
));
I prefer to do this on many queries. First find the required tag:
$this->loadModel('Tag');
$tag = $this->Tag->find('first', array('conditions' => array('Tag.tag' => 'Novel')));
$tag_id = $tag['Tag']['id'];
Then find book_ids:
$this->loadModel('BookTag');
$book_ids = $this->BookTag->find('list', array('conditions' => 'BookTag.tag_id' => $tag_id, 'fields' => 'book_id, book_id'));
Then find books:
$this->Book->find('all', array('conditions' => array('Book.id' => $book_ids)));
It is a long code but runs fast and is easy to understand. Another way is to use sub-queries but they are ugly and may slow down your application
My associations in CakePHP are a bit off. Here is the problem. I have a users table
and a comments table. When retrieving a submission I want to join the users table
on the comments table with Comment.user_id == User.id.
Comment Model:
class Comment extends AppModel {
var $name = 'Comment';
var $belongsTo = array('User');
var $hasMany = array(
'CommentsLike' => array(
'className' => 'CommentsLike'
),
'Comment' => array(
'className' => 'Comment'
)
);
var $hasAndBelongsToMany = array(
'User' => array(
'className' => 'User',
'joinTable' => 'comments',
'foreignKey' => 'Comment.user_id',
'associationForeignKey' => 'user_id'
),
'Submission' => array(
'className' => 'Submission'
)
);
User Model:
class User extends AppModel {
var $name = 'User';
var $hasMany = array('Comment');
var $hasAndBelongsToMany = array(
'Comment' => array(
'className' => 'Comment',
'joinTable' => 'comments',
'foreignKey' => 'Comment.user_id',
'associationForeignKey' => 'user_id',
),
'Submission' => array(
'className' => 'Submission',
'order' => 'Submission.created DESC'
)
);
When I grab a submission, it grabs all comments for it, but it doesn't join on
the users table which is what I want
Submission Model:
class Submission extends AppModel {
var $name = 'Submission';
var $belongsTo = array(
'User' => array(
'className' => 'User'
)
);
var $hasMany = array(
'Comment' => array(
'className' => 'Comment',
'order' => 'Comment.created DESC',
'conditions' => array(
'Comment.deleted' => 0
)
),
'SubmissionsVote' => array(
'className' => 'SubmissionsVote'
),
'SubmissionThumbnails' => array(
'className' => 'SubmissionThumbnails'
)
);
A find on a submission will return this:
[Submission] => Array
(
// removed for sake of stackoverflow length
)
[User] => Array
(
[id] => 2
[username] => bob_cobb
)
[Comment] => Array
(
[0] => Array
(
[id] => 1
[submission_id] => 112
[comment] => this is a test comment
[user_id] => 2
[created] => 5 minutes ago
[deleted] =>
[parent_id] =>
)
)
As you can see [Comment][0] should also have [Comment][0][User] or something similar.
Why would I want this? Simple: I want to grab the username of the person who
commented by the foreign key of user_id from the comments table. I've read the docs and tutorials and pretty sure I'm close on this but not sure what's holding me back.
Here is a screenshot of the comments table:
Here is a screenshot of the users table structure:
You can a couple of options:
Either set the recursive property in the Submission model to the level you need to fetch back your associated data ( see http://book.cakephp.org/2.0/en/models/model-attributes.html#recursive )
or (more preferable) use the Containable behaviour ( see http://book.cakephp.org/2.0/en/core-libraries/behaviors/containable.html ) to specify what related data to return:
class Submission extends AppModel
public $actsAs = array('Containable');
}
Use it like this in your find:
$data = $this->Submission->find('all', array(
'conditions'=>array(your conditions here),
'contain'=>array(
'User,
'Comment'=>array(
'User'
)
)
));
Most people use containable in every model so add it to AppModel and set AppModel::recursive to -1
Is it possible to make relation in cakephp model with some specific conditions:
eg:
var $belongsTo = array(
'Parent' => array(
'className' => 'Category',
'foreignKey' => 'parent_id',
'dependent' => true
)
);
I want the above relation on where field parent_id is not 0. Please give some overview on How to do that?
You can put conditions in the relations just like you do with finds.
var $belongsTo = array(
'Parent' => array(
'className' => 'Category',
'foreignKey' => 'parent_id',
'dependent' => true,
'conditions' => array(
...
)
)
);