Validation of Unique Entity - validation

Question

I have an account entity which contains a foreign key constraint for a user entity and customer entity.
I'm trying to validate the customer id is numeric and not null. Plus the unique constraint of user_id and customer_id.
My problem the Class Constraint UniqueEntity gets fired regardless of the outcome of the customer_id type: numeric validation result. Which throws a 500 because the customer_id column is an integer.
What I need to do is, validate the customer_id is a valid id (numeric and not null) before checking the unique constraint. Or is there any other way to avoid symfony/doctrine going to the db to test an invalid id?
My validation config,
MY\ApplicationBundle\Entity\Account:
constraints:
- Symfony\Bridge\Doctrine\Validator\Constraints\UniqueEntity:
fields: [ user_id, customer_id ]
message: Customer Id already exists for User
properties:
customer_id:
- Type:
type: numeric
message: Customer Id should be an integer.
- NotBlank:
message: Customer cannot be blank.

Answer 1

Group Sequences should solve your problem here. Something like that should work:
MY\ApplicationBundle\Entity\Account:
group_sequence:
- Basic
- Account
constraints:
- Symfony\Bridge\Doctrine\Validator\Constraints\UniqueEntity:
fields: [ user_id, customer_id ]
message: Customer Id already exists for User
properties:
customer_id:
- Type:
type: numeric
message: Customer Id should be an integer.
groups: [Basic]
- NotBlank:
message: Customer cannot be blank.
groups: [Basic]
With group sequences you can define the order of your validations. Basic checks all constraints with the group Basic and Account cheks the other constraints for this entity.