Symfony 4 : choiceType doesn't show choice

I'm new with symfony and I want to build select option using choiceType. So I add this code to buildForm method :

$builder->add('applications', ChoiceType::class, [
            'choices' => [
                '-- Choisir --' => NULL,
                'Admin' => '2',
                'Super' => '1',
                'visiteur' => '10',
                'admin local' => '98',
                'partenaire gestionnaire' => '16',
                'admin national' => '15',
                'soutien' => '11',
                'exploitant' => '12',
                'moe' => '99',
            ]
        ])

But when I inspect HTML code I don't have the correct numbers :

<select id="user_applications" name="user[applications]" >
<option value="0" selected="selected">-- Choisir --</option>
<option value="1">Admin</option>
<option value="2">Super</option>
<option value="3">visiteur</option>
<option value="4">admin local</option>
<option value="5">partenaire gestionnaire</option>
<option value="6">admin national</option>
<option value="7">soutien</option>
<option value="8">exploitant</option>
<option value="9">moe</option>

CodePudding user response：

You need to remove '-- Choisir --' => NULL, by another value, you can't use null value.

If a value is null or similar, symfony replaces all values by integer

The best practice is to use the placeholder attribute in your case

CodePudding user response：

To add some context to Le Professionnel's answer: If you take a look at the ChoiceType documentation, you can see that the type allows you to define a custom placeholder. Try changing your code to this:

$builder->add('applications', ChoiceType::class, [
    'placeholder' => '-- Choisir --',
    'choices' => [
        'Admin' => '2',
        'Super' => '1',
        'visiteur' => '10',
        'admin local' => '98',
        'partenaire gestionnaire' => '16',
        'admin national' => '15',
        'soutien' => '11',
        'exploitant' => '12',
        'moe' => '99',
    ]
])