Question

I have looked through the documentation and unless i’ve missed it I’m not able to find anything explaining what the official $options are for the buildForm->add() function in Symfony2.

public function buildForm(FormBuilder $builder, array $options)
{

    $builder->add('fieldname1');        
    $builder->add('fieldname2', new formObjectType(), $arrayOptions);

}

Taking the code above, what options would be passed in as an array for the second field.

Thanks

Answer 1

This same question has bothered me as well. The default options are written inside respective type classes. Let’s take DateType as an example.

DateType::getDefaultOptions() lists all the default options, if you don’t define them yourself. In addition we have DateType::getAllowedOptionValues() – it seems to define which values are valid for certain options.

Note that all of the classes extend AbstractType and in addition to this inheritance every “type” implements FormTypeInterface::getParent(). For DateType the parent is FieldType. FieldType is obviously the parent class for most fields and it has a couple of default options defined as well. I’m guessing all these options get merged together upon calling out a specific form type.