Im developing a CMS with cakephp, i have 2 tables that i need to filter by some parameters, and for optimization i must do the query starting on the "hasMany" Model, the easy way will be make it on the "belongsTo" Model.
class Client extends AppModel {
public $actsAs = array('Containable');
public $hasMany = array('Projects');
}
class Project extends AppModel {
public $actsAs = array('Containable');
public $belongsTo = array('Client');
}
I have the where conditions in the $conditions array.
$this->paginate = array(
'Client' => array(
'limit' => 20,
'conditions' => $conditions,
'contain' => array(
'Project' => array(
//'limit' => 20
)
)
)
);
$this->set('clients', $this->paginate('Client'));
By this way i get 20 Clients and all the projects inside each Client. If i uncomment the line i get 20 projects inside each of the 20 Clients.
I want 20 projects totally, doesnt matter how many clients (max 20).
Can anyone help me?
Thanks in advance.
If you want to show the projects, you should paginate the project;
$this->paginate = array(
'Project' => array(
'limit' => 20,
'conditions' => $conditions,
// no need to set a limit on 'client',
// as each project belongs to only one client
'contain' => array(
'Client'
)
)
);
$this->set('projects', $this->paginate('Project'));
It may be nescessary to add the Project model to your $uses array inside the controller
Related
I just cant get data from 2 tables in a HABTM relationship and I cant get the answer for these cakephp docs (again). Sorry for asking the question on something that should be explained in the docs.
This should be a simple but I keep getting undefined index and the relationship I set up seems in accordance with the docs. I have another post on a more complicated matter but this issue needs to be isolated .
I dont know how to get related data from the lessons table and the students table via this lessons-students HABTM table.
I want all the lessons a student does. I want the name of the student from the student table and lesson details from the lesson table which has lesson_id as the common link in this lessons-students table. Sounds simple but I cant do it.
public $hasAndBelongsToMany = array(
'Student' => array(
'className' => 'Student',
'joinTable' => 'lessons_students',
'foreignKey' => 'lesson_id',
'associationForeignKey' => 'student_id',
'unique' => 'keepExisting',
)
);
class LessonsController extends AppController {
....
$this->Lesson->recursive = -1;
$options['joins'] = array(
array('table' => 'lessons_students',
'alias' => 'LessonsStudent',
'type' => 'LEFT',
'conditions' => array(
'Lesson.id = LessonsStudent.lesson_id',
)
),
array('table' => 'students',
'alias' => 'Student',
'type' => 'LEFT',
'conditions' => array(
'LessonsStudent.student_id=Student.id',
)
),
);
$options['conditions'] = array('Student.id' => 2);
// $Item->find('all', $options);
$student=$this->set( 'student',$this->Lesson->find('all', $options));
In the view I get the error undefined index Student
<?php
// debug($student);
foreach ($student as $item2):
echo '<td>'. $item2['Lesson']['id'].'</td>';
echo '<td>'. $item2['Student']['id'].'</td>';
http://stackoverflow.com/questions/17250215/cant-get-all-user-data-from-habtm-in-cakephp
http://book.cakephp.org/2.0/en/models/associations-linking-models-together.html#hasandbelongstomany-habtm
If you want to use model association you need to remove $this->Lesson->recursive = -1; because it disable any associations defined in model. And than you can remove $options['joins'].
If you have defined many association in your Lesson model and don't want to fetch all of it use unbindModel() or use Containable behavior
$this->Lesson->Behaviors->load('Containable');
$this->Lesson->contain('Student');
If you need to do find many times in many actions it's better to enable Containable in model itself
class Lesson extends AppModel {
public $actsAs = array('Containable');
}
so you can avoid $this->Lesson->Behaviors->load('Containable'); line;
I have a problem with nested model pagination using containable in Cake...
I've got three models: Category, CompanyCategory, Company and there association is like this
Category hasMany CompanyCategory
CompanyCategory belongsTo Category
CompanyCategory belongsTo Company
Company hasMany CompanyCategory
I get data using contain, as shown below:
$options = [
'conditions' => ['Category.slug' => $slug],
'contain' => [
'CompanyCategory.Company.CompanyAddress'
]
];
return $this->find('first', $options);
Everything works properly, until I wanted to paginate the nested model - Company. I use CategoriesController with show method, which renders the view with the selected category and associated companies (Company hasMany Categories and Category hasMany Companies).
I've tried something like this:
$this->Paginator->settings = [
'limit' => 1,
'order' => [
'id' => 'asc'
],
'contain' => array('CompanyCategory.Company')
];
$data = $this->Paginator->paginate('Category.CompanyCategory.Company', array('Category.slug LIKE' => $slug));
$this->set('category', $data);
But this didn't work for me :(
Any suggestions / help?
If you define Category has a hasAndBelongsToMany relation, it would be easy for you. Thus you created a new Model called CompanyCategory, i assume there is a reason..
You can try this-
$this->Category->bindModel(
array(
'hasAndBelongsToMany' => array(
'Company'
)
)
);
$this->Paginator->settings = array(
'conditions' => array(
'Category.slug' => $slug
),
'limit' => 1,
'order' => array(
'id' => 'asc'
),
'contain' => array(
'Company'
)
);
I assume your relation table name is categorys_companies.... If not then you need take different approach
Finnaly I resolve my problem using
$this->Paginator->settings = array(
'limit' => 2,
);
$this->Paginator->paginate('Category.CompanyCategory.Company');
I forgot to write that I use method from CategoriesController, not Companies.
But now another problem blocked me... I use TranslateBehaviour, and data which I get has no translations...
Any idea? I googled a lot, but couldn't find any satisfactory solution.
hi guys i am new to cakephp
now i'm facing a little big problem
here is the situation
i hava a shop that hasMany Catalogs which is related to many products each product has a category
i want to fetch them all just by getting the shop
i dont know how to do it
trying to use hasMAny gives me just the ids
instead is there any way to get shop inside it array of catalogs each catalog has Product's array which has one array of category
thank you
Ok, I'm on my computer now :).
In ShopModel:
class ShopModel extends AppModel {
public $hasMany = array(
'Catalog' => array(
// binding params here...
),
);
}
In CatalogModel:
class CatalogModel extends AppModel {
public $hasMany = array(
'Product' => array(
// binding params...
),
),
}
... and this goes on...
If you don't want to get excessive data in all actions, you should set in AppModel:
class AppModel extends Model {
public $recursive = -1;
}
In the controller action where you call the find function with associations:
$this->Shop->Behaviors->load('Containable');
$big_array = $this->Shop->find('all', array(
'conditions' => array(
//...
),
'contain' => array(
'Catalog' => array(
'Product' => array(
// etc, you get the point :)
),
),
),
));
It is also nice to declare the $belongsTo associations too, so you can access anything from anywhere, something like this:
$this->Catalog->Behaviors->load('Containable');
$big_array = $this->Catalog->find('all', array(
'conditions' => array(
//...
),
'contain' => array(
'Product' => array(
// ...
),
'Shop' => array(
// ...
),
),
));
EDIT
I see you have a Product->Category relation that i guess would be defined with $belongsTo. If you do a query like the one above, you will get a lot of duplicate queries (same category in many products). You can use $this->Category->find('list') but very often I find this inappropriate as it is returning only one field (I would be grateful if someone knows a way how can I get more fields with the list type). For this purpose, my workaround is making a custom function in the Category model like this:
class Category extends AppModel {
public function getSorted ($options = array()) {
$temp= $this->find('all', $options);
$output = array();
foreach ($temp[$this->alias] as $row) {
$output[$this->alias][$row['id']] = $row;
}
unset($temp);
return $output;
}
}
Then in the controller I would declare two arrays, the big one without category association and the category list one:
$this->loadModel('Category');
$this->set('categories', $this->Category->getSorted());
This way, I can get the needed category row by category id wherever i need it in the view.
Do not use CakePHP association they are not good handling complex relationships, you will later face problems with....Instead create all your join queries on the fly...I am giving you one example below:
Create one function inside Shop model and join catalog and product as shown below:
$options = array(
'conditions' => array('Product.id'=>9),
'joins' => array(
array(
'alias' => 'Catalog',
'table' => 'catalogs',
'type' => 'LEFT',
'conditions' => array(
'Catalog.product_id = Product.id',
),
),
array(
'alias' => 'Product',
'table' => 'products',
'type' => 'LEFT',
'conditions' => array(
'Shop.id = Product.shop_id',
),
)
),
'fields' => array('Product.*'),
'group' => array('Product.id')
);
$returnData = $this->find('all',$options);
This will make coding little easier and you can escape from associations!
I have got stuck on Multilevel associated tables in Cake PHP code.
I have the following models
Guardian who has many students and the various students have their studentfees. When I create a guardian with 2 students, an associated 2 row must be created for StudentFees table. Im successful in adding 2 students when adding a guardian, but I dont know how to add the 2 rows of fees for the student. My code is as below.
class Guardian extends AppModel {
public $name = 'Guardian';
public $recursive =2;
public $hasMany = array(
'Student' => array(
'className' => 'Student',
'dependent' => true
)
);
}
class Student extends AppModel {
public $name = 'Student';
public $hasMany = array(
'StudentFee' => array(
'className' => 'StudentFee',
'dependent' => true
)
);
}
class StudentFee extends AppModel {
public $name = 'StudentFee';
public $belongsTo = array(
'Student' => array(
'className' => 'Student',
'dependent' => true
)
);
}
Pl help me to save the studenFee details too. I use SaveAssociated function that saves guardian and Student details.
If I understood you correctly, this should do the trick:
Model::saveAll() should take care of it for you and select the appropriate method, saveMany or saveAssociated. Moreover, it will automatically set your foreignKeys so everything is neatly inserted into the database.
$this->Guardian->saveAll(array('Guardian' => array(
[...],
'Student' => array(
0 => array(
[here's your first Student],
'StudentFee' => array(
0 => array(
[here's your first StudentFee]
)
)
)
)
)));
can use saveAll and saveAssociated methods.
You can try using this method, which i always use in such situations :
$this->Studentfee->create();
$this->Studentfee->set(array(
'field1' => 'value',
'field2' => 'value'
));
$this->Studentfee->save();
and you can put in a loop for all student fees
I use CakePHP 2.2.2
I have 3 tables: restaurants, kitchens and kitchens_restaurants - join table for HABTM.
In Restaurant model I have:
public $hasAndBelongsToMany = array(
'Kitchen' =>
array(
'className' => 'Kitchen',
'joinTable' => 'kitchens_restaurants',
'foreignKey' => 'restaurant_id',
'associationForeignKey' => 'kitchen_id',
'unique' => true,
'conditions' => '',
'fields' => 'kitchen',
'order' => '',
'limit' => '',
'offset' => '',
),
The problem is that I have separate controller for my main page in which I need to retrieve data from this models with complex conditions.
I added
public $uses = array('Restaurant');
to my main page controller and here comes the part where I need your advices.
I need to select only those restaurants where kitchen = $id.
I've tried to add
public function index() {
$this->set('rests', $this->Restaurant->find('all', array(
'conditions' => array('Restaurant.active' => "1", 'Kitchen.id' => "1")
)));
}
and I got SQLSTATE[42S22]: Column not found: 1054 Unknown column in 'where clause' error.
Obviously I need to fetch data from "HABTM join table" but I don't know how.
TLDR:
To retrieve data that's limited based on conditions against a [ HABTM ]'s association, you need to use [ Joins ].
Explanation:
The code below follows the [ Fat Model/Skinny Controller ] mantra, so the logic is mostly all in the model, and just gets called from a controller.
Note: You don't need all those HABTM parameters if you follow the [ CakePHP conventions ] (which it appears you are).
The below code has not been tested (I wrote it on this site), but it should be pretty darn close and at least get you in the right direction.
Code:
//Restaurant model
public $hasAndBelongsToMany = array('Kitchen');
/**
* Returns an array of restaurants based on a kitchen id
* #param string $kitchenId - the id of a kitchen
* #return array of restaurants
*/
public function getRestaurantsByKitchenId($kitchenId = null) {
if(empty($kitchenId)) return false;
$restaurants = $this->find('all', array(
'joins' => array(
array('table' => 'kitchens_restaurants',
'alias' => 'KitchensRestaurant',
'type' => 'INNER',
'conditions' => array(
'KitchensRestaurant.kitchen_id' => $kitchenId,
'KitchensRestaurant.restaurant_id = Restaurant.id'
)
)
),
'group' => 'Restaurant.id'
));
return $restaurants;
}
//Any Controller
public function whateverAction($kitchenId) {
$this->loadModel('Restaurant'); //don't need this line if in RestaurantsController
$restaurants = $this->Restaurant->getRestaurantsByKitchenId($kitchenId);
$this->set('restaurants', $restaurants);
}
There is a much cleaner way than the solution provided by Dave.
First you need to set a reverse HABTM Relationship between Restaurant and Kitchen in the Kitchen Model.
Than you just make a find for the Kitchen you are interested in (id = 1) and you will get the associated restaurants, using Containable Behavior for filtering by Restaurant fields.
$this->Restaurant->Kitchen->Behaviors->attach('containable'); // Enable Containable for Kitchen Model
$this->Restaurant->Kitchen->find('first', array(
'recursive' => -1 // don't collect other data associated to Kitchen for performance purpose
'conditions' => array('Kitchen.id' => 1),
'contain' => array('Restaurant.active = 1')
));
Source
You can not need use [join], because use have setting [ HABTM ]'s association
Kitchen model hasAndBelongsToMany Restaurant model so that you can code as bellow
KitchensControllers
<?php
public function index() {
$this->Kitchen->recursive = 0;
$kitchens = $this->Kitchen->find('all', array('contain' => array('Restaurant')));
$this->set('kitchens', $kitchens);
}
?>
Good luck!