CODEWITHSUNDEEP
phpformsvalidationcakephp-3.0
dmeskel
dmeskel

Reputation: 53

Cakephp 3 how to set maximum number of selected option in multiple select?

I would like to set a rule to limit the number of option visitors can select in a field multiple select.

I tried this, but it doesn't work

$validator
    ->add('colors._ids', [
        'multiple'=>[
            'rule'=>['multiple', ['max'=>3]],
            'message'=>'Please select only one color'
        ]
    ])
    ->requirePresence('colors._ids', 'create');
//    ->allowEmpty('colors._ids');

return $validator;

In the view the field is displayed like that:

echo $this->Form->input('colors._ids', ['options' => $colors, 'multiple' => true]);

Using debugtoolkit I can read:

Thank you very much for your help

Upvotes: 1

Views: 972

Answers (1)

Tom
Tom

Reputation: 268

I had a similar problem to you and to solve it I ended up using a custom validation rule.

So for example:

->add('tablename', 'custom', [
            'rule' => function($value) {
                return (bool)(is_array($value['_ids']) && count($value['_ids']) === 3);
            },
            'message' => 'Please select 3.'
        ]);

This rule will make sure the user selects 3 items from the select. No more no less, I'm sure you could adapt this for your problem.

Upvotes: 2

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