I have question in cakephp model,
I want to add dynamic condition in var $hasMany keyword
I want to add condition like current user_id, i got user Id after my login.
var $hasMany = array(
"AskComment"=>array('limit'=>3),
'AskStatistic',
'AskContactsLink',
'AskStatistic',
'AskObject',
'AskLikes'
);
If you want to add dynamic condition in your model, then you might have to bind the model association-ship dynamically into your controller's code. Write the following code into your controller's method for which you want to impose some new condition on the existing/new associated models.
$this->PrimaryModel->bindModel(array('hasMany' => array(
'AskComment' => array(
'className' => 'AskComment',
'foreignKey' => 'primary_id',
'conditions' => array('AskComment.user_id' => $user_id)
)
)
));
Take a look at this link: Creating and destroying associations on the fly. This will surely help you to achieve the same.
I think its better to put your association in the construct function of your Model.
like this:
/**
* #see Model::__construct
*/
public function __construct($id = false, $table = null, $ds = null) {
public $hasMany = array(
'AskComment' => array(
'className' => 'AskComment',
'foreignKey' => 'primary_id',
'conditions' => array(
'AskComment.user_id' => $user_id,
),
),
);
}
Related
Actually in my scenario I am binding relations in model's constructor function. Actually I need to use a model attribute in my model relationship and Cakephp preventing using model attribute in default relationships. So I can't use
public $hasMany = array(
'ProductDetail' => array(
'className' => 'ProductDetail',
'conditions' => array(
'ProductDetail.language_id' => $this->languageId //Throws error
),
'dependent' => true
),
);
So I made a trick. I did bind model relations on model's __construct() function. Below is my code
public function __construct($id = false, $table = null, $ds = null) {
parent::__construct($id, $table, $ds);
$this->bindModel(array(
"hasMany" => array(
'ProductDetail' => array(
'className' => 'ProductDetail',
'dependent' => true,
'conditions' => array(
'ProductDetail.language_id' => $this->languageId //Doesn't throw an error
)
)
)
)
);
}
This trick works for me in each scenario. But when I delete a product, dependent model can't be deleted when I am binding relations under __construct() function. Is there any way to make this trick works or I need to trigger dependent functionality manually ?
After doing research I found that pass second parameter to false on bindModel function. Because this will make your on-the-fly binding last the duration of the request. So in that case Model::bindModel function looks like
$this->bindModel(array(
"hasMany" => array(
'ProductDetail' => array(
'className' => 'ProductDetail',
'dependent' => true,
'conditions' => array(
'ProductDetail.language_id' => $this->languageId
)
)
)
), false
);
I'm building a CakePHP powered website, where users can refer each other, i was thinking about a "Has and Belongs to many" relationship (A user can have multiple referrals, but can be referred only by one)
is this the right way or it's better with another association / road ?
Thanks in advance!
If I'm correct in assuming that a User can refer many, but may only be referred by one, then something like this should suffice for what you're doing:
//User model
$belongsTo = array(
'Referrer' => array(
'className' => 'User',
'foreignKey' = > 'referrer_id'
)
);
$hasMany = array(
'Referree' => array(
'className' => 'User',
'foreignKey' => 'referrer_id'
)
);
Details about Multiple relations to the same model.
An example of how to retrieve the data:
//User model
public $actsAs = array('Containable');
public $recursive = -1; //better to set in AppModel IMO
public function getUser($userId = null) {
if(empty($userId)) return false;
return $this->find('first', array(
'conditions' => array(
$this->alias . '.' . $this->primaryKey => $userId
),
'contain' => array(
'Referrer',
'Referee'
)
));
}
I am trying to do a search, using pagination for posts which have a specific tag or tags (for example, if a user was to select two tags, then posts containing either tag would be returned).
I have the relationship defined in my Posts table
public $hasAndBelongsToMany = array('Tags' => array(
'className' => 'Tags',
'joinTable' => 'posts_tags',
'foreignKey' => 'post_id',
'associationForeignKey' => 'tag_id',
'unique' => 'keepExisting'));
How do I use Find to retrieve rows with a given tag (name or ID would be fine)
Trying:
// other pagination settings goes here
$this->paginate['conditions']['Tags.id'] = 13;
gives me an error that the relationship does not exist.
Looking at the debug info it appears that the tables are not joining the Posts_Tags and Tags table, however, when I debug the data making it to the view, the Posts objects contain the tags data.
Most of the documentation I can find for this seems to revolve around earlier versions of CakePHP, any help would be appreciated.
Could not find a satisfying solution myself.
I created a behavior to take care of this.
Create a file called HabtmBehavior.php and put it in your app/Model/Behavior folder.
Put the block of code in there and save file.
Add the behavior to your model: eg public $actsAs = array('Habtm');
Here is a usage example with find.
<?php $this->Entry->find('all', array('habtm'=>array('Tag'=>array('Tag.title'=>'value to find'))) ?>
Paginate would look something like this:
$this->paginate['Entry']['habtm']['Tag'] = array('Tag.title'=>'value to find');
You are free to add as many relations as you want by adding additional Model Names in the habtm array.
(Just be careful not to make it to complex since this could start slowing down your find results.)
<?php
class HabtmBehavior extends ModelBehavior {
public function beforeFind(Model $model, $options) {
if (!isset($options['joins'])) {
$options['joins'] = array();
}
if (!isset($options['habtm'])) {
return $options;
}
$habtm = $options['habtm'];
unset($options['habtm']);
foreach($habtm as $m => $scope){
$assoc = $model->hasAndBelongsToMany[$m];
$bind = "{$assoc['with']}.{$assoc['foreignKey']} = {$model->alias}.{$model->primaryKey}";
$options['joins'][] = array(
'table' => $assoc['joinTable'],
'alias' => $assoc['with'],
'type' => 'inner',
'foreignKey' => false,
'conditions'=> array($bind)
);
$bind = $m.'.'.$model->{$m}->primaryKey.' = ';
$bind .= "{$assoc['with']}.{$assoc['associationForeignKey']}";
$options['joins'][] = array(
'table' => $model->{$m}->table,
'alias' => $m,
'type' => 'inner',
'foreignKey' => false,
'conditions'=> array($bind) + (array)$scope,
);
}
return $options;
}
}
Hope this helps.
Happy baking.
I think the best solution is apply find function on join table Model. I try this before and it's work fine.
in your PostTag model :
/**
* #see Model::$actsAs
*/
public $actsAs = array(
'Containable',
);
/**
* #see Model::$belongsTo
*/
public $belongsTo = array(
'Post' => array(
'className' => 'Post',
'foreignKey' => 'post_id',
),
'Tags' => array(
'className' => 'Tag',
'foreignKey' => 'tag_id',
),
);
in your controller :
// $tagsId = tags ids
$posts = $this->PostTag->find('all', array('conditions' => array('PostTag.tag_id' => $tagsId),'contain' => array('Post')));
also is better follow cake naming convention, if you have tags(plural), post_tags(first singular second plural),posts(plural) tables you must have Tag,PostTag,Post Models.
For some reason i'm really having a hard time wrapping my head around HABTM associations. I learn best by watching someone do something and explaining why. Anyways, I have 2 tables I want associated, Drugs, and SideEffects. I've created the intermediate table drugs_side_effects(has no data right now). Does cake put the data in that automatically or do I need to do something? The 3.7.6.5 hasAndBelongsToMany (HABTM) from the book didn't specify.
I've set up the models correctly(I think) and am not sure how to proceed at this point. It seems pretty simple. I need to display side_effect from the SideEffects table in a Drug view. I think in the edit_french controller function i'll need something like
$side_effect = $this->Drug->SideEffect->read(
array('SideEffect.id','SideEffect.side_effect'), $id);
$this->set('side_effect',$side_effect);
but I feel like that won't work as expected. Or maybe there's a more efficient way? Any advice or help is appreciated.
Drug Model:
var $hasAndBelongsToMany = array(
'SideEffect' => array(
'className' => 'SideEffect',
'joinTable' => 'drug_side_effects',
'foreignKey' => 'drug_id',
'associationForeignKey' => 'side_effect_id'
)
);
}
?>
SideEffect Model:
var $hasAndBelongsToMany = array(
'Drug' => array(
'className' => 'Drug',
'joinTable' => 'drug_side_effects',
'foreignKey' => 'side_effect_id',
'associationForeignKey' => 'drug_id'
)
);
}
?>
Drugs Controller:
<?php
class DrugsController extends AppController {
var $name = 'Drugs';
var $helpers = array('Html','Form','Paginator');
var $paginate = array(
//'contain' => array('SideEffect'),
//'fields' => array('Drug.id', 'Drug.generic'),
'fields' => array('Drug.id', 'Drug.generic','Drug.date_altered'),
'limit' => 50,
'order' => array(
'Drug.generic' => 'asc'
)
);
function index() {
$data = $this->paginate('Drug');
$alldrugs = $this->set('drugs', $this->Drug->find('all'));
$this->set('drugs', $data);
$this->set('alldrugs', $data);
//$this->set('lessdrugs', $this->paginate());
$this->set('title_for_layout','List of all current drugs');
}
function edit_french($id = null) {
$this->Drug->id = $id;
$drug = $this->Drug->read(
array(
'Drug.id','Drug.generic','Drug.ahl','Drug.aap','Drug.rid','Drug.oral','Drug.mw','Drug.clinical_recommendations'
),
$id
);
$this->set('title_for_layout', 'Translate clinical recommendations - ' . $drug['Drug']['generic']);
$this->set('drug',$drug);
if (empty($this->data)) {
$this->data = $this->Drug->read();
} else {
if ($this->Drug->save($this->data)) {
$this->Session->setFlash('The drug has been updated.');
$this->redirect(array('action' => 'index'));
}
}
}
}
?>
You can pull the related data using ContainableBehavior. To do so, simply run a find on the Drug model and tell it to contain the associated SideEffect data.
$drug = $this->Drug->find('first', array(
'conditions' => array(
'Drug.id' => $id
),
'contain' => array(
'SideEffect'
)
));
You can also set the contain before using read() if you prefer.
$this->Drug->contain(array('SideEffect'));
$drug = $this->Drug->read(null, $id);
Using Containable allows you to gather all associated data in a single find() request.
I have the following model
class Comment extends AppModel {
var $useTable = "comments";
var $recursive = 1;
var $belongsTo = array(
'User' => array(
'className' => 'User',
'foreignKey' => 'userID'
)
);
function bindCommentsToUser() {
$this->bindModel(
array('belongsTo' => array(
'User' => array(
'className' => 'User',
'foreignKey' => 'userID'
)
)
)
);
}
The belongsTo variable at the top does absolutely nothing, I just cannot get it to work.
To confirm that the binding exists, I created the lower function to do dynamic binding which works perfectly. There appears to be no difference between the two. Is there some mistake that I am making or is there some setting somewhere else that has to be set?
There should be the same in both cases. You may want to create a ticket at http://cakephp.lighthouseapp.com. If possible change 'userID' to 'user_id' as recommended Travis Lleu. That will work for sure.