Symfony 3 & Doctrine - Complex form with OnetoMany and ManyToMany relation - symfony-forms

Question

I want to manage the rates of a product in multi-currency and keep historic of currency rates.
So onetomany relation:
A Rates can have many CurrencyRate.
A manyto many relation:
Many currencyRate have many currencies.
RATES :
+-----------------+----------+------+-----+---------+----------------+
| Field | Type | Null | Key | Default | Extra |
+-----------------+----------+------+-----+---------+----------------+
| id | int(11) | NO | PRI | NULL | auto_increment |
| rate | double | YES | | NULL | |
| timeStamp | datetime | NO | | NULL | |
| currencyRate_id | int(11) | YES | MUL | NULL | |
+-----------------+----------+------+-----+---------+----------------+
CURRENCY RATES
+-----------+----------+------+-----+---------+----------------+
| Field | Type | Null | Key | Default | Extra |
+-----------+----------+------+-----+---------+----------------+
| id | int(11) | NO | PRI | NULL | auto_increment |
| rate | double | NO | | NULL | |
| timeStamp | datetime | NO | | NULL | |
+-----------+----------+------+-----+---------+----------------+
currencyrateshascurrencies (manytomany join table)
+-----------------+---------+------+-----+---------+-------+
| Field | Type | Null | Key | Default | Extra |
+-----------------+---------+------+-----+---------+-------+
| currency_id | int(11) | NO | PRI | NULL | |
| currencyRate_id | int(11) | NO | PRI | NULL | |
+-----------------+---------+------+-----+---------+-------+
currencies
+-------------+--------------+------+-----+---------+----------------+
| Field | Type | Null | Key | Default | Extra |
+-------------+--------------+------+-----+---------+----------------+
| id | int(11) | NO | PRI | NULL | auto_increment |
| name | varchar(255) | NO | UNI | NULL | |
| abreviation | varchar(5) | NO | UNI | NULL | |
+-------------+--------------+------+-----+---------+----------------+
I want to generate a form from all of this.
The html form would get all available currencies with a text field to indicate the CurrencyRate.
Ex :
USD <input type="text">
EUR <input type="text">
CNY <input type="text">
...
I saw the documentation on Symfony about manytomany form. But mine is more complex with an additional onetomany relation and text field. I am totaly lost.
Thanks if you can put me on the right direction.
Best regards,
Pierre

Answer 1

I found the response :
First I needed to correct my Schema which didn't need a ManytoMany relation :
Rates :
+-----------+----------+------+-----+---------+----------------+
| Field | Type | Null | Key | Default | Extra |
+-----------+----------+------+-----+---------+----------------+
| id | int(11) | NO | PRI | NULL | auto_increment |
| rate | double | YES | | NULL | |
| timeStamp | datetime | NO | | NULL | |
+-----------+----------+------+-----+---------+----------------+
CURRENCY RATES
+-------------+---------+------+-----+---------+----------------+
| Field | Type | Null | Key | Default | Extra |
+-------------+---------+------+-----+---------+----------------+
| id | int(11) | NO | PRI | NULL | auto_increment |
| ratio | double | NO | | NULL | |
| currency_id | int(11) | YES | MUL | NULL | |
| Rate_id | int(11) | YES | MUL | NULL | |
+-------------+---------+------+-----+---------+----------------+
Currencies
+-------------+--------------+------+-----+---------+----------------+
| Field | Type | Null | Key | Default | Extra |
+-------------+--------------+------+-----+---------+----------------+
| id | int(11) | NO | PRI | NULL | auto_increment |
| name | varchar(255) | NO | UNI | NULL | |
| abreviation | varchar(5) | NO | UNI | NULL | |
+-------------+--------------+------+-----+---------+----------------+
Then One Form Type
class CurrencyRateType extends AbstractType
{
public function buildForm(FormBuilderInterface $builder, array $options)
{
$builder->add('currency',EntityType::class, array(
'class'=>'AppBundle:Currencies',
'choice_label' => 'abreviation',
'disabled' => true,
))
->add('ratio', TextType::class);
}
public function configureOptions(OptionsResolver $resolver)
{
$resolver->setDefaults(array(
'data_class' => CurrencyRates::class,
));
}
}
which is embedded in the final form type :
class RateType extends AbstractType
{
public function buildForm(FormBuilderInterface $builder, array $options)
{
$builder ->add('rate')
->add('CurrencyRate', CollectionType::class, array(
'entry_type' => CurrencyRateType::class,
'entry_options' => array('label' => false))
)
->add('save', SubmitType::class, array('label' => 'create'));
}
public function configureOptions(OptionsResolver $resolver)
{
$resolver->setDefaults(array(
'data_class' => Rates::class,
));
}
}