Pagination using joining multiple models

Course Queries Syllabus Queries 2 years ago

0 2 0 0 0 tuteeHUB earn credit +10 pts

5 Star Rating 1 Rating

Posted on 16 Aug 2022, this text provides information on Syllabus Queries related to Course Queries. Please note that while accuracy is prioritized, the data presented might not be entirely correct or up-to-date. This information is offered for general knowledge and informational purposes only, and should not be considered as a substitute for professional advice.

Take Quiz To Earn Credits!

Turn Your Knowledge into Earnings.

tuteehub_quiz

Answers (2)

Post Answer
profilepic.png
manpreet Tuteehub forum best answer Best Answer 2 years ago

 

Each exam has one syllabus, each syllabus has one exam. So, I did this in the Exam model:

public $hasOne = 'Syllabuses'; //table: syllabuses, model: Syllabuses

From UsersController I did this:

public $uses = array('Setting', 'Exam', 'Syllabuses');

And in a method in UsersController I wanted to call paginate:

$options = array(
    'fields' => array('Exam.id', 'Exam.name', 'Syllabuses.id', 'Syllabuses.name', 'Syllabuses.syllabus', 'Syllabuses.last_updated'),
    'joins' => array(
        'table' => 'syllabuses',
        'conditions' => array('Exam.id = Syllabuses.exam_id')
    )
);
$this->paginate = $options;
$this->set('syllabuses', $this->Paginator->paginate('Syllabuses'));

exams table:

---+------+
id | name |
---+------+

and syllabuses table:

---+---------+------+----------+--------------+
id | exam_id | name | syllabus | last_updated |
---+---------+------+----------+--------------+

So, I got some error. Like this:

Error: SQLSTATE[42000]: Syntax error or access violation: 1064 You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'syllabuses Array LEFT JOIN oes.syllabuses AS Syllabuses ON (Syllabuses.`' at line 1

And my SQL that CakePHP prepared is:

SELECT `Exam`.`id`, `Exam`.`name`, `Syllabuses`.`id`, `Syllabuses`.`name`, `Syllabuses`.`syllabus`, `Syllabuses`.`last_updated` 
FROM `oes`.`exams` AS `Exam` syllabuses Array 
LEFT JOIN `oes`.`syllabuses` AS `Syllabuses` ON (`Syllabuses`.`exam_id` = `Exam`.`id`)
WHERE 1 = 1 LIMIT 20

But what I want is something like the query bellow. I have tested it in mysql:

SELECT  `Exam`.`id` AS eid,  `Exam`.`
                                                
                                                
0 views
0 shares
profilepic.png
manpreet 2 years ago

 

Ok, I think this can be helpful for many programmers. That's why I want to share what I did finally:

$options = array(
    'fields' => array(
        'Exam.id',
        'Exam.name',
        'Syllabuses.id',
        'Syllabuses.name',
        'Syllabuses.exam_id',
        'Syllabuses.syllabus',
        'Syllabuses.last_updated'
    ),
    'recursive' => 0,
    'conditions' => array('Exam.id = Syllabuses.exam_id'),
    'limit' => 3
);
$this->paginate = $options;
$syllabuses = $this->Paginator->paginate('Exam');

0 views   0 shares

No matter what stage you're at in your education or career, TuteeHub will help you reach the next level that you're aiming for. Simply,Choose a subject/topic and get started in self-paced practice sessions to improve your knowledge and scores.