Get data from joined table in CakePHP - cakephp

I need to get data(all the id of the assurance that related to that Indicator datum) from assurances_indicator_data,and I didn't know the right way to join data in CakePHP my code didn't work and it return an empty array.
IndicatorDatum Model :
public $hasAndBelongsToMany = array(
'Assurance' => array(
'className' => 'Assurance',
'joinTable' => 'assurances_indicator_data',
'foreignKey' => 'indicator_datum_id',
'associationForeignKey' => 'assurance_id',
'unique' => true,
'conditions' => '',
'fields' => '',
'order' => '',
'limit' => '',
'offset' => '',
'finderQuery' => '',
'deleteQuery' => '',
'insertQuery' => ''
)
);
function getIndicatorDataAssurance($indi_id){
$assuranceData = $this->find('all',array(
'joins' => array(
array('table' => 'assurances_indicator_data',
'type' => 'INNER',
'conditions' => array(
'AssurancesIndicatorData.indicator_datum_id' => $cun_indi)))));
return $assuranceData;
}
}

The easiest way to join tables in CakePhp is to have to models each representing a table in your database.
An example below, you can modify it to the names of your tables and models:
class ModelOne extends AppModel{
public $belongTo = array('ModelTwo');
}
class ModelTwo extends AppModel{
public $hasMany = array('ModelOne');
}
Then in your controller if you query any of these models, your response array should contain data from both tables.

Related

Cakephp HABTM issue retrieving multilevel data

I am creating an assessment database and using cakephp for the first time. I have gotten all the data entry and editing sorted but am having trouble retrieving some crucial data from a deep association:
The essence is
Course HABTM Units (table courses_units)
Unit hasMany Artefacts
Artefact hasOne AdminArtefact
Artefact belongsTo an Unit
The AdminArtefact model is used for each years dynamic data for an artefact (due_date, late_date and so on).
My problem is when I want to get all the due dates of artefacts for a particular course (which we need to check for hand in congestion)
If I do a findAll in the Artefacts controller with recursion set to '2' it gets all the data I need...but it overloads the page due to the amount of data returned. So I want to set the conditions for the findAll for the specific fields I need. However I cannot set the course in the query - From my understanding the course data is pulled from a 'separate' query as it appears in the results like this:
[Course] => Array
(
[0] => Array
(
[id] => 2
[course_code] => C0767S
[course_name] => BSc (hons) Entertainment Technology
[course_local_code] => ET
[course_leader] => 6
[colour] =>
[CoursesUnit] => Array
so as part of the query, I cannot set the course equal to a specific one, which I need to do so I can also specify the other data elements I want to pull and not the wealth of other data.
Ive tried loading the Unit model and changing the bind to a belongsTo instead of HABTM to the courses_units table but got the same dataset back again.
Ive tried going 'higher up the chain' to the CourseUnits controller and doing a '$uses' and specified all the relevant tables I want to pull data from but that didn't get anything useful.
Reading up on HABTM it doesn't automatically pull the data so I looked at joining the tables, but couldn't really see which model to make the join to get it to work.
I need to put this to bed now so hence I am asking the question: What is the most elegant way to get the due dates for all the artefacts for a specific course? (I need the course, the unit, the artefact and the due date...so something from all the tables)
QUERY String I want to use in Artefacts controller:
$data = $this->Artefact->find('all', array(
'fields' => array('Artefact.reference', 'AdminArtefact.due_date', 'ArtefactUnit.short_code', 'Course.course_code' )));
This gives the error:
Error: SQLSTATE[42S22]: Column not found: 1054 Unknown column 'Course.course_code' in 'field list'
Thanks in advance!
Kevin
All relevant models:
class Course extends AppModel {
public $displayField = 'course_name';
public $hasAndBelongsToMany = array(
'Unit' =>
array(
'className' => 'Unit',
'joinTable' => 'courses_units',
'foreignKey' => 'course_id',
'associationForeignKey' => 'unit_id',
'unique' => true,
'conditions' => '',
'fields' => '',
'order' => '',
'limit' => '',
'offset' => '',
'finderQuery' => '',
'with' => 'CoursesUnit'
)
);
public $belongsTo = array(
'CourseLeader' => array(
'className' => 'User',
'foreignKey' => 'course_leader'
)
);
class Unit extends AppModel {
public $displayField = 'short_code';
public $hasMany = array(
'UnitArtefacts' => array(
'className' => 'Artefacts',
'foreignKey' => 'unit_id'
));
public $hasAndBelongsToMany = array(
'Course' =>
array(
'className' => 'Course',
'joinTable' => 'courses_units',
'foreignKey' => 'unit_id',
'associationForeignKey' => 'course_id',
'unique' => true,
'conditions' => '',
'fields' => '',
'order' => '',
'limit' => '',
'offset' => '',
'finderQuery' => '',
'with' => 'CoursesUnit'
)
);
public $belongsTo = array(
'External' => array(
'className' => 'User',
'foreignKey' => 'external_examiner'
),
'Coordinator' => array(
'className' => 'User',
'foreignKey' => 'coordinator'
),
'UnitLevel' => array(
'className' => 'Level',
'foreignKey' => 'level_id'
)
);
class Artefact extends AppModel {
public $displayField = 'reference';
public $hasOne = array(
'AdminArtefact' => array(
'className' => 'AdminArtefact',
'foreignKey' => 'artefact_id'
)
);
public $belongsTo = array(
'ArtefactUnit' => array(
'className' => 'Unit',
'foreignKey' => 'unit_id'
)
);
actually setting
'recursive' => 3,
should work.

Define Database Constraints in both Model and Database

I have been trying to define database relations and constraints in both model and Database?
Currently it is throwing error.
I have two tables 'posts' and 'comments'. And I have defined the relationship in my models as follows:
class Comment extends AppModel {
public $belongsTo = array(
'Post' => array(
'className' => 'Post',
'foreignKey' => 'post_id',
'conditions' => '',
'fields' => '',
'order' => ''
)
);
}
and
class Post extends AppModel {
public $hasMany = array(
'Comment' => array(
'className' => 'Comment',
'foreignKey' => 'post_id',
'dependent' => false,
'conditions' => '',
'fields' => '',
'order' => '',
'limit' => '',
'offset' => '',
'exclusive' => '',
'finderQuery' => '',
'counterQuery' => ''
)
);
}
Am I missing something ? Anyone please help.
Thanks in Advance..
I don't think you need all those empty values and they may be messing things up. You should only need:
Comment.php
class Comment extends AppModel {
public $belongsTo = array(
'Post'
);
}
and
class Post extends AppModel {
public $hasMany = array(
'Comment'
);
}
Also, let us know the error as currently we have nothing to go on...

Getting data from a $hasAndBelongsToMany relation at CakePHP 2.2

I have 3 tables:
- users
- posts
- Subscriptions (which should be by default posts_users (n-n))
The subscriptions table is the n-n table needed for this relation. I didnt want to call it "posts_users" as it is very confusing for my system because i have more relations between users and posts.
The, to create the hasAndBelongsToMany relation, i did this:
Post (model):
public $hasAndBelongsToMany = array(
'Subscriptions' => array(
'className' => 'User',
'joinTable' => 'subscriptions',
'foreignKey' => 'post_id',
'associationForeignKey' => 'user_id',
'unique' => 'keepExisting',
'conditions' => '',
'fields' => '',
'order' => '',
'limit' => '',
'offset' => '',
'finderQuery' => '',
'deleteQuery' => '',
'insertQuery' => ''
)
);
User (model):
public $hasAndBelongsToMany = array(
'Post' => array(
'className' => 'Post',
'joinTable' => 'subscriptions',
'foreignKey' => 'user_id',
'associationForeignKey' => 'post_id',
'unique' => 'keepExisting',
'conditions' => '',
'fields' => '',
'order' => '',
'limit' => '',
'offset' => '',
'finderQuery' => '',
'deleteQuery' => '',
'insertQuery' => ''
)
);
Lets say i want to find the subscribed posts for the user with id 3.
Is there any way to do a find to retrieve data of subscribed Posts for a user?
In which model should i do the query? How??
Thanks.
Ok. Finally i got it.
You can do the query from any of the two related models. In this case Post or User.
$this->Post->User->find('all', array(
'conditions' => array('User.id' => $this->Session->read('Auth.User.id')),
'contain' => array('Subscriptions')
));
This would return the subscribed tickets (in the subscriptions array) for the current user.

CakePHP Find with HABTM using only the Join Table

I have a Goal model that HasAndBelongsToMany Users. This HABTM is named Participant. When I try to find all the Participants of a goal, the join table for this HABTM is not being used. Here is the related code in the goal model.
class Goal extends AppModel {
var $hasAndBelongsToMany = array(
'Participant' => array(
'className' => 'User',
'joinTable' => 'goal_participants',
'foreignKey' => 'goal_id',
'associationForeignKey' => 'user_id',
'unique' => true,
'conditions' => '',
'fields' => '',
'order' => '',
'limit' => '',
'offset' => '',
'finderQuery' => '',
'deleteQuery' => '',
'insertQuery' => ''
));
function getParticipantIDs($goalID) {
$this->bindModel(array('hasOne' => array('Participant')));
return $this->find('list', array(
'fields' => array('Participant.user_id'),
'conditions' => array('Participant.goal_id' => $goalID)
));
}
}
I am binding the Participant as hasOne so that it will create a join in the query, but I get the following error:
Warning (512): SQL Error: 1054: Unknown column 'Participant.user_id' in 'field list' [CORE\cake\libs\model\datasources\dbo_source.php, line 525]
Query: SELECT `Participant`.`id`, `Participant`.`user_id` FROM `users` AS `Participant` WHERE `Participant`.`goal_id` = '19' AND `Participant`.`status` != 2
I edited the answer after OP's comment.
If i understand well what you intend to do, this piece of code might help :
function getParticipantIDs($goalID) {
$participants = $this->GoalParticipant->find('list', array(
'fields' => array('user_id'),
'conditions' => array('goal_id' => $goalID)
));
return array_values($participants);
}
I'm not 100% sure GoalParticipant is the correct syntax. I'm pretty sure that if the join table was named goals_participants, the correct syntax would be GoalsParticipant but as it's named goal_participants I guess it might be GoalParticipant.

With CakePHP, How to select records based on conditions on related tables

Another noob question - using v1.2.1.8004 of CakePHP, I think...
I have 3 tables, broker (B), quote_site (QS) and broker_quote_site (BQS) that links them together.
B has many BQS (it belongs to B)
QS has many BQS (it belongs to QS)
I am trying to retrieve quote sites, that are linked to a specific broker, but CakePHP is not doing the joins to the tables behind the scenes.
Here is my query:
$quote_sites = $this->QuoteSite->find('all', array(
'conditions' => array(
'Broker.company_id' => $company_id,
'BrokerQuoteSite.is_active' => true
),
'contain' => array(
'BrokerQuoteSite' => array(
'Broker'
)
)
));
Here are the related models:
<?php
class QuoteSite extends AppModel
{
var $name = 'QuoteSite';
//$validate set in __construct for multi-language support
//The Associations below have been created with all possible keys, those that are not needed can be removed
var $hasMany = array(
'BrokerQuoteSite' => array(
'className' => 'BrokerQuoteSite',
'foreignKey' => 'quote_site_id',
'dependent' => false,
'conditions' => '',
'fields' => '',
'order' => '',
'limit' => '',
'offset' => '',
'exclusive' => '',
'finderQuery' => '',
'counterQuery' => ''
)
);
}
?>
Broker:
<?php
class Broker extends AppModel
{
var $name = 'Broker';
//$validate set in __construct for multi-language support
//The Associations below have been created with all possible keys, those that are not needed can be removed
var $hasMany = array(
'BrokerQuoteSite' => array(
'className' => 'BrokerQuoteSite',
'foreignKey' => 'broker_id',
'dependent' => false,
'conditions' => '',
'fields' => '',
'order' => '',
'limit' => '',
'offset' => '',
'exclusive' => '',
'finderQuery' => '',
'counterQuery' => ''
)
);
}
?>
And the last one:
<?php
class BrokerQuoteSite extends AppModel
{
var $name = 'BrokerQuoteSite';
//$validate set in __construct for multi-language support
//The Associations below have been created with all possible keys, those that are not needed can be removed
var $belongsTo = array(
'Broker' => array(
'className' => 'Broker',
'foreignKey' => 'broker_id',
'conditions' => '',
'fields' => '',
'order' => '',
) ,
'QuoteSite' => array(
'className' => 'QuoteSite',
'foreignKey' => 'quote_site_id',
'conditions' => '',
'fields' => '',
'order' => '',
)
);
}
?>
Thanks in advance for any tips/tricks.
Chris why don't you define Broker as a HABTM relationship then a simple find will retrive the desired results?
class Broker extends AppModel {
var $name = 'Broker';
var $hasAndBelongsToMany = array(
'QuoteSite' =>
array(
'className' => 'QuoteSite',
'joinTable' => 'broker_quote_sites',
'foreignKey' => 'broker_id',
'associationForeignKey' => 'quote_site_id'
)
);
}
http://book.cakephp.org/view/1044/hasAndBelongsToMany-HABTM
Nice question and what I thought is to make it two steps
$this->Broke = ClassRegistry::init("Broke");
$brokeids = $this->Broke->find("list",array("conditions"=>array('Broker.company_id' => $company_id))); //get all B ids
$this->QuoteSite->Behaviors->attach('Containable'); //use containable behavior
$quote_sites = $this->QuoteSite->find('all',array(
'contain'=>array(
'BrokerQuoteSite'=>array(
'conditions'=>array(
"BrokerQuoteSite.broke_id"=>$brokeids,
"BrokerQuoteSite.is_active" => true
)
)
)
)
);
The code is NOT tested yet,maybe some syntax mistakes out there.Hope it helps.
update
$this->Broke = ClassRegistry::init("Broke");
$this->Broke->recursive=2;
$brokes = $this->Broke->find("all",array("conditions"=>array("Broke.company_id"=>$comany_id)));
the QS information you need shall be found if you view the result with debug($brokes); .What you need to do is extracting them from the array.
Cheers.

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