use CheckboxSetField to manage the many_many relation.
this will not allow creating Ingredients on the fly, it will only give you check boxes that you can tick to link the items.
public function FragranceAddForm() {
$fragrances_field = new CheckboxSetField('Ingredients', 'Ingredient', Ingredient::get()->map());
$fields = new FieldList(
new TextField('Name', 'Fragrance Name'),
new TextareaField('Description', 'Fragrance Description'),
$fragrances_field
);
$actions = new FieldList(
new FormAction('doFragranceAdd', 'Add Fragrance')
);
$validator = new RequiredFields('Name', 'Description');
return new Form($this, __FUNCTION__, $fields, $actions, $validator);
}
public function doFragranceAdd($data, $form) {
$submission = new Fragrance();
$form->saveInto($submission);
$submission->write();
return $this->redirectBack();
}
