Conditions to paginate for belongsToMany CakePHP 3

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I have the tables Semesters, Disciplines and a jointTable Semesters_Disciplines. I want to create a action index in DisciplinesController with a semester_id as parameter, wh

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终归单人心

2020-12-16 06:03

You'll have to use a query that uses matching or joins to be able to filter on non 1:1/n-1 associations.

You can do so by either passing a query directly to the paginate() method

// ...
$this->set('disciplines', $this->paginate(
    $this->Disciplines
        ->find()
        ->matching('Semesters', function(\Cake\ORM\Query $q) use ($semester_id) {
            return $q->where([
                'Semesters.id' => $semester_id
            ]);
        })
        ->group(['Disciplines.id'])
));
// ...

or by using a custom finder.

// ...
$this->paginate = [
    'finder' => [
        'semesters' => [
            'semester_id' => $semester_id
        ]
    ]
];
$this->set('disciplines', $this->paginate($this->Disciplines));
// ...

// DisciplinesTable
public function findSemesters(\Cake\ORM\Query $query, array $options)
{
    $query
        ->matching('Semesters', function(\Cake\ORM\Query $q) use ($options) {
            return $q->where([
                'Semesters.id' => $options['semester_id']
            ]);
        })
        ->group(['Disciplines.id']);
    return $query;
}