I have problem with HABTM models. When I try to fetch any related model f.e. like this:
$this->Tagi->find('first');
I dont get any results for associated model. Result looks like this:
array(
'Tagi' => array(
'id' => '1',
'nazwa' => 'sth'
),
'Instytucje' => array()
)
I am sure that there should be result, I've double checked it, even
$this->Tagi->getDataSource()->getLog(false, false)
shows correct query, that fetches right results.
If you have any idea whats wrong plz give me a hint.
Tagi model:
public $hasAndBelongsToMany = array(
'Instytucje' =>
array(
'className' => 'Instytucje.Instytucje',
'joinTable' => 'instytucje-tagi',
'foreignKey' => 'tag_id',
'associationForeignKey' => 'instytucja_id',
'unique'=> true
)
);
Instytucje model:
public $hasAndBelongsToMany = array(
'Tagi' =>
array(
'className' => 'Instytucje.Tagi',
'joinTable' => 'instytucje-tagi',
'foreignKey' => 'instytucja_id',
'associationForeignKey' => 'tag_id',
'unique'=> true
)
);
EDIT:
Main problem is that HABTM refers to AppModel causing error:
Error: Table app_models for model AppModel was not found in datasource prod.
Which can be bypassed by adding $useTable in AppModel, which results in prior problem.
SOLVED
When using naming convention far beyond this Cake use, you have use third model with $useTable pointed on reference table.
Moreover its important to correctly point Cake to classes inside plugins.
I think you're problem relates to the fact that you are not using CakePHP's naming conventions. From the look of the query being generated Cake doesn't know how to correctly alias the join table, hence getting an AppModel alias in your query. I suspect that this is causing issues when Cake tries to build the results array from the query.
This might not work, but try creating a model for the joins table called InstytucjeTagi; then update your associations to use this using the with key:-
Tagi model:
public $hasAndBelongsToMany = array(
'Instytucje' =>
array(
'className' => 'Instytucje.Instytucje',
'joinTable' => 'instytucje-tagi',
'with' => 'InstytucjeTagi',
'foreignKey' => 'tag_id',
'associationForeignKey' => 'instytucja_id',
'unique'=> true
)
);
Instytucje model:
public $hasAndBelongsToMany = array(
'Tagi' =>
array(
'className' => 'Instytucje.Tagi',
'joinTable' => 'instytucje-tagi',
'with' => 'InstytucjeTagi',
'foreignKey' => 'instytucja_id',
'associationForeignKey' => 'tag_id',
'unique'=> true
)
);
If this doesn't fix it try using the afterFind() callback in the Tagi model to check what Cake is returning:-
afterFind($results, $primary = false) {
parent::afterFind($results, $primary);
// Print out the $results to check what Cake is returning.
debug($results);
return $results;
}
Related
I want to use aliases in cakephp(2.5.3) models which names are different from the name of the related model. The problem occures when I want o save data with saveAssociated method. My models have hasMany and belongsTo relations. When I want to save data it says there is na error. I dig the problem and think that this could be a problem with validateAssociated method which can change $data value or my knowledge of CakePHP is still on newbe level... Can anyone explain me what may I do wrong ?.
My Model A:
public $hasMany = array(
'alias1' => array(
'className' => 'AB',
'foreignKey' => 'a_id'
),
);
My Model AB:
public $belongsTo = array(
'alias2' => array(
'className' => 'A',
'foreignKey' => 'a_id'
),
'alias3' => array(
'className' => 'B',
'foreignKey' => 'b_id'
),
);
I try to save data with:
$this->alias2->alias1->saveAssocated($this->request->data)
Any idea ?
how to get name of (UserTransactionType.name) with Transaction.who_pay_fee_1,2,3 fields.
'user_transaction_type_id' works well but how to get the rest of fields work :(
//Transaction Model
public $belongsTo = array(
'UserTransactionType' => array(
'className' => 'UserTransactionType',
'foreignKey' => 'user_transaction_type_id',
'conditions' => '',
'fields' => '',
'order' => ''
),
//UserTransactionType Model
public $hasMany = array(
'Transaction' => array(
'className' => 'Transaction',
'foreignKey' => 'user_transaction_type_id',
'dependent' => false,
))
This is the sample code for your controller:
$this->UserTransactionType->find('all',array(
'fields' => array('name'),
'contain' => array('Transaction')
)
);
If Models are associated you can specify in 'contain' which of them you want to get in the result.
If you want to have only some fields of related Model, you can determine them after 'Transaction' in 'contain' just like in the regular find() query:
'contain' => array('Transaction' => array('fields' => array('field_1',
'field_2') ))
But in your case, you don't need to specify fields, because by default you get all fields.
So no matter if you define or not fields "who_pay_fee_1,2,3" because if you use 'contain' by default you will get foreing_key - user_transaction_type_id.
I hope it's helpful
For people they like CakePhp :)
in Controller ->
get the list of 'UserTransactionType'
in View ->
after looping trough all the transactions; in Transaction Status column simply load the 'UserTransactionType'array and assign the number of array to $userTransactionTypes.
$userTransactionTypes[$transaction['Who_pay_fee_1']];
To be honest it was straight forward but needed a bit concentration :)
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.
In my CakePHP app I have models for Matches and Teams. Each Match has a home_team_id and an away_team_id, both of which reference a different Team.
In my team.php file, I am able to form the relationship for a Team's home matches:
var $hasMany = array(
'HomeMatch' => array('className' => 'Match', 'foreignKey' => 'home_team_id'),
'AwayMatch' => array('className' => 'Match', 'foreignKey' => 'away_team_id')
);
My problem is that I cannot automatically retrieve a Team's home and away Matches in a single array. That is, the retrieved Matches are returned in separate HomeMatch and AwayMatch arrays, which causes sorting difficulties.
I have tried the following:
var $hasMany = array(
'Match' => array('foreignKey' => array('home_team_id', 'away_team_id'))
);
...with no luck.
Any ideas on how to combine these two foreign keys into a single relationship?
Thanks, Ben
A custom finderQuery should do the trick:
public $hasMany = array(
'Match' => array(
'className' => 'Match',
'foreignKey' => false,
'finderQuery' => 'SELECT *
FROM `matches` as `Match`
WHERE `Match`.`home_team_id` = {$__cakeID__$}
OR `Match`.`away_team_id` = {$__cakeID__$}'
)
);
I was having a similar issue and instead of creating a finderQuery I used the conditions operator and it worked great!
public $hasMany = array(
'Match' => array(
'className' => 'Match',
'foreignKey' => false,
'conditions' => array(
'OR' => array(
array('Match.home_team_id' => '{$__cakeID__$}'),
array('Match.away_team_id' => '{$__cakeID__$}')
)
),
)
);
They are returned in seperate array's because the sort of represent different models (in this particular case the model is the same).
You should probably build a helper method to go over the retrieved data (in the model object or in a separate helper class) and "flatten" it. then you'd be able to sort it.
Ken.
please help me, i'm really struggling with this...
Authors can write post, and authors can love other authors' posts...
So posts belong to author (when authors write them), but posts habtm
authors (when authors love them).
For example i'd like to get posts ordered by number of postlovers and
created in the last 24 hours. Here's my models and join table:
TABLE: lovedposts_postlovers
id: INT
lovedpost_id: INT
postlover_id: INT
POST MODEL
<?php
class Post extends AppModel {
var $name = 'Post';
var $belongsTo = 'Author';
var $hasAndBelongsToMany = array(
'Postlover' =>
array(
'className' => 'Author',
'joinTable' => 'lovedposts_postlovers',
'foreignKey' => 'lovedpost_id',
'associationForeignKey' => 'postlover_id',
'unique' => true
)
);
var $displayField = 'title';
}
?>
AUTHOR MODEL
<?php
class Author extends AppModel {
var $name = 'Author';
var $hasMany = 'Post';
var $hasAndBelongsToMany = array(
'Lovedpost' =>
array(
'className' => 'Post',
'joinTable' => 'lovedposts_postlovers',
'foreignKey' => 'postlover_id',
'associationForeignKey' => 'lovedpost_id',
'unique' => true
)
);
var $displayField = 'username';
}
?>
Your best option is to query on the joinModel. Usually that would be:
$this->Author->AuthorsLovedpost->find(...);
But since you're not sticking to the Cake naming conventions for the table that may or may not be different. The joinModel is automatically created BTW, but you can also explicitly specify it in the HABTM declaration.
var $hasAndBelongsToMany = array(
'Postlover' => array(
...,
'with' => 'joinModelName'
)
);
For the find options you can do whatever you need, 'group' => 'post_id' and 'order' => 'COUNT(post_id)' or something to that extend. What you're looking for is getting the right set of 'post_ids' back.
Since from the point of view of the joinModel the Author and Post models are both belongsTo relationships, Cake will find related results accordingly and you can use the usual 'contain' options etc to filter results.
Hope that helps.
I think you should take a step back and try to read the documentation (book.cakephp.org). Try to make a demo using their examples.
lovedposts_postlovers table is very confusing and maybe should be called something else, maybe authors_posts or even favorites. well, it can be anything as long as you specify it in 'joinTable'.
lovedposts_postlovers should have the fields author_id, post_id
//POST MODEL
var $hasAndBelongsToMany = array(
'Author' =>
array(
'className' => 'Author',
'joinTable' => 'lovedposts_postlovers',
'foreignKey' => 'author_id',
'associationForeignKey' => 'post_id',
'unique' => true
)
);
For example i'd like to get posts ordered by number of postlovers and created in the last 24 hours. Here's my models and join table:
$this->Post->LovedPosts->find('all', array('fields'=>array('Post.title', 'count(LovedPosts.*) as favorited'), 'group'=>'LovedPosts.post_id');
Basically you want to do a select count query and group by the post_id and this code should get you on the right track. Note: I didn't test this code. You also need an order clause in that find operation but I will leave that to you.