Use formBuilder in a foreach to generate multiple fields - symfony

Question

I'm developing a project with Symfony 5, currently busy with an import of data from CSV to a database. It's requested to offer the client the possibility to choose, which data from the CSV is corresponding to which field of the database.
For example, I want to import users to the database.
The array of fields from the database:
$databaseFields = ['username', 'email', 'lastname', 'firstname'];
The array of headers, frome the CSV:
$headersCsvArray = ['email', 'username', 'lastName'];
Based on this 2 arrays, I need to build a form:
foreach ($databaseFields as $databaseField) {
$builder->add('extraFields', ChoiceType::class,
[
'label' => $databaseField,
'placeholder' => 'Choose a column from the excel file',
'choices' => $headersCsvArray,
'multiple' => false,
'expanded' => false,
'required' => false
]
);
}
To be clear, I need an input for each field of the User entity, with a dropdown with every header from the CSV.
This form is link to an ImportUserFormModel, with basically nothing for the moment:
class ImportUserFormModel
{
public $extraFields;
}
The result I need when I do $form->getData('extraData'):
$importDatas = [
'username' =>
[
'username' => true,
'emails' => false,
'lastName' => false
],
'email' =>
[
'username' => false,
'emails' => true,
'lastName' => false
],
'lastname' =>
[
'username' => false,
'emails' => false,
'lastName' => true
],
'firstname' =>
[
'username' => false,
'emails' => false,
'lastName' => true
],
];
Where the TRUE value is the one choose from the select dropdown.
Here is the result I actually have:
So I'm asking myself: Is it possible to use the foreach here?

Answer 1

Ok if you want it dynamic this could be a solution.
Create a Model for your extra field too, like
class ExtraField {
private $databseField;
private $csvField;
// ...
}
And in your base model use it as a collection
class ImportUserFormModel
{
private $extraFields;
public getFields(): ExtraField[] {
// ...
}
public addField(ExtraField $extraField) {
// ...
}
}
Create a FormType for your ExtraField model and another one for your base model where extraFields is a CollectionType.
Then before the form creation define the fields in your model
$importUserFormModel = new ImportUserFormModel();
foreach ($databaseFields as $databaseField) {
$extraField = new ExtraField();
$extraField->setDatabaseField($databaseField);
$importUserFormModel->addExtraField($extraField);
}
$form = $this->createForm(ImportUserFormModelType::class, $importUserFormModel);
// ....
The thing i'm not sure about is how to put the name of the database field in the label of the form field but you could template it.