Symfony 1.4/ Doctrine; n-m relation data cannot be accessed in template (indexSuccess)
- by chandimak
I have a database with 3 tables. It's a simple n-m relationship. Student, Course and StudentHasCourse to handle n-m relationship. I post the schema.yml for reference, but it would not be really necessary.
Course:
connection: doctrine
tableName: course
columns:
id:
type: integer(4)
fixed: false
unsigned: false
primary: true
autoincrement: false
name:
type: string(45)
fixed: false
unsigned: false
primary: false
notnull: false
autoincrement: false
relations:
StudentHasCourse:
local: id
foreign: course_id
type: many
Student:
connection: doctrine
tableName: student
columns:
id:
type: integer(4)
fixed: false
unsigned: false
primary: true
autoincrement: false
registration_details:
type: string(45)
fixed: false
unsigned: false
primary: false
notnull: false
autoincrement: false
name:
type: string(30)
fixed: false
unsigned: false
primary: false
notnull: false
autoincrement: false
relations:
StudentHasCourse:
local: id
foreign: student_id
type: many
StudentHasCourse:
connection: doctrine
tableName: student_has_course
columns:
student_id:
type: integer(4)
fixed: false
unsigned: false
primary: true
autoincrement: false
course_id:
type: integer(4)
fixed: false
unsigned: false
primary: true
autoincrement: false
result:
type: string(1)
fixed: true
unsigned: false
primary: false
notnull: false
autoincrement: false
relations:
Course:
local: course_id
foreign: id
type: one
Student:
local: student_id
foreign: id
type: one
Then, I get data from tables in executeIndex() from the following query.
$q_info = Doctrine_Query::create()
->select('s.*, shc.*, c.*')
->from('Student s')
->leftJoin('s.StudentHasCourse shc')
->leftJoin('shc.Course c')
->where('c.id = 1');
$this->infos = $q_info->execute();
Then I access data by looping through in indexSuccess.php. But, in indexSuccess I can only access data from the table Student.
<?php foreach ($infos as $info): ?>
<?php echo $info->getId(); ?>
<?php echo $info->getName(); ?>
<?php endforeach; ?>
I expected, that I could access StudentHasCourse data and Course data like the following.
But, it generates an error.
<?php echo $info->getStudentHasCourse()->getResult()?>
<?php echo $info->getStudentHasCourse()->getCourse()->getName()?>
The first statement gives a warning;
Warning: call_user_func_array() expects parameter 1 to be a valid callback, class 'Doctrine_Collection' does not have a method 'getCourse' in D:\wamp\bin\php\php5.3.5\PEAR\pear\symfony\escaper\sfOutputEscaperObjectDecorator.class.php on line 64
And the second statement gives the above warning and the following error;
Fatal error: Call to a member function getName() on a non-object in D:\wamp\www\sam\test_doc_1\apps\frontend\modules\registration\templates\indexSuccess.php on line 5
When I check the query from the Debug toolbar it appears as following and it gives all data I want.
SELECT s.id AS s__id, s.registration_details AS s__registration_details, s.name AS s__name, s2.student_id AS s2__student_id, s2.course_id AS s2__course_id, s2.result AS s2__result, c.id AS c__id, c.name AS c__name
FROM student s LEFT JOIN student_has_course s2 ON s.id = s2.student_id LEFT JOIN course c ON s2.course_id = c.id
WHERE (c.id = 1)
Though the question is short, as all the information mentioned it became so long. It's highly appreciated if someone can help me out to solve this. What I require is to access the data from StudentHasCourse and Course. If those data cannot be accessed by this design and this query, any other methodology is also appreciated.
