I’m trying to traverse the relations on CakePHP models. This is the database:
I can access product attributes (product->attributes
) on a product model but I cannot access the product attributes on Ad model (ad->product->attributes
).
Here is my code:
//Product Model class Product extends AppModel { public $useTable = 'products'; public $displayField = 'name'; public $hasAndBelongsToMany = array( 'Attributes' => array( 'className' => 'Attribute', 'joinTable' => 'product_has_attributes', 'foreignKey' => 'products_id', 'associationForeignKey' => 'attributes_id', 'unique' => true, 'conditions' => '', 'fields' => '', 'order' => '', 'limit' => '', 'offset' => '', 'finderQuery' => '', 'with' => 'product_has_attributes' ) ); public $hasMany = array( 'Ads' => array( 'className' => 'Ad', 'foreignKey' => 'Products_id', 'conditions' => '', 'order' => '', 'limit' => '', 'dependent' => true ) ); //Ad Model class Ad extends AppModel { public $displayField = 'Name'; public $belongsTo = array( 'Product' => array( 'className' => 'Products', 'foreignKey' => 'products_id', 'conditions' => '', 'fields' => '', 'order' => '' ) ); //Attribute Model class Attribute extends AppModel { public $displayField = 'name'; public $hasAndBelongsToMany = array( 'Products' => array( 'className' => 'Product', 'joinTable' => 'product_has_attributes', 'foreignKey' => 'attributes_id', 'associationForeignKey' => 'products_id', 'unique' => true, 'conditions' => '', 'fields' => '', 'order' => '', 'limit' => '', 'offset' => '', 'finderQuery' => '', 'with' => 'product_has_attributes' ) ); // Products controller -> Action View class ProductsController extends AppController { public function view($id = null) { if (!$this->Product->exists($id)) { throw new NotFoundException(__('Invalid product')); } $options = array('conditions' => array('Product.' . $this->Product->primaryKey => $id)); $this->set('product', $this->Product->find('first', $options)); } } // Ads controller -> Action View class AdsController extends AppController { public function view($id = null) { if (!$this->Ad->exists($id)) { throw new NotFoundException(__('Invalid ad')); } $options = array('conditions' => array('Ad.' . $this->Ad->primaryKey => $id)); $this->set('ad', $this->Ad->find('first', $options)); }
And here is what I do in the views:
//Products Views: snipet of view.ctp print_r ($product); // this prints rhe product and all associated attributes //Ads Views: snipet of view.ctp print_r ($ad['Product']); //this will print only the product fields, but not the attributes associated to the product
What is wrong? How do I access the relation Ad->product->attribute
from my Ad model?
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Answer
Perhaps the problem could be that you’re not using CakePHP’s conventions.
From the docs:
“new join table’s name needs to include the names of both models involved, in alphabetical order, and separated with an underscore ( _ ).”
So, your join table should be named attributes_products
.
Also, check your foreign keys. They should be in singular form.
- attributes_products.id
- attributes_products.product_id
- attributes_products.attribute_id
Hopefully that solves the problem.
References: