CakePHP 3.x - hasMany through association - find

Question

Assuming I have exactly the setup as in CookBook here: http://book.cakephp.org/3.0/en/orm/associations.html

class StudentsTable extends Table
{
    public fu         


        

Answer 1

through Allows you to provide a either the name of the Table instance you want used on the join table, or the instance itself. This makes customizing the join table keys possible, and allows you to customize the behavior of the pivot table.

Define a more specific relationship using array syntax:

class StudentsTable extends Table
{

    public function initialize(array $config)
    {
        $this->belongsToMany('Courses', [
            'joinTable' => 'courses',
            'through' => 'CourseMemberships',
        ]);
    }
}

class CoursesTable extends Table
{

    public function initialize(array $config)
    {
        $this->belongsToMany('Students', [
            'joinTable' => 'students',
            'through' => 'CourseMemberships',
        ]);
    }
}

class CoursesMembershipsTable extends Table
{

    public function initialize(array $config)
    {
        $this->belongsTo('Students', [
            'foreignKey' => 'student_id',
            'joinType' => 'INNER',        // OR specify the type 
        ]);
        $this->belongsTo('Courses', [
            'foreignKey' => 'course_id',
            'joinType' => 'INNER',
        ]);
    }
}

Be sure that you have tables courses, students, and course_memberships.

Now run the code:

$query = $this->Courses->find('all')
    ->contain(['CourseMemberships'])
    ->where(['CourseMemberships.student_id' => $student['id'], 'CourseMemberships.grade' => 'A']);

Well, I'm affraid if you really need something related with the HasMany Associations.