Examples

How to Validate Entity Framework model?

How to Validate Entity Framework model?

Entity Framework provides a great variety of validation features that can feed through to a user interface for client-side validation or be used for server-side validation. When using code first, you can specify validations using annotation or fluent API configurations.

Should I validate DTOs or entities?

Entities should perform validation. And you should validate the DTOs. The difference lies in what happens when invalid data is encountered. If invalid data is passed to an Entity’s methods, or you try to initialize a new entity with invalid state, the Entity itself should throw exceptions.

How do you call a stored procedure in Entity Framework first?

Open the SchoolModel. Store node and then open the Stored Procedures node. Then right-click the GetCourses stored procedure and select Add Function Import. In the Add Function Import dialog box, under Returns a Collection Of select Entities, and then select Course as the entity type returned.

What is entity validation?

Entity Framework validates all data before it is written to the database by default, using a wide range of data validation methods. However, Entity Framework comes after the user-interface data validation.

Should DTOs have validation?

You should validate DTOs regardless of whether you validate entities or not. As already said, DTOs contain any garbage from client. It’s responsibility of Service Layer to validate every service method parameter value, and call the underlying Domain Layer with only correct values.

How do you validate DTOs?

Let’s create a step-by-step example to demonstrate how to validate the Spring boot REST API DTO request using Hibernate validator.

  1. Create Spring boot application in STS.
  2. Maven Dependencies.
  3. Create User Class.
  4. Create UserDto Class.
  5. Configure Database.
  6. Create UserRepository.
  7. Create UserService Class.
  8. Create UserController Class.

How do you catch DbEntityValidationException?

You can catch the DbEntityValidationException , unwrap the actual errors and create a new DbEntityValidationException with the improved message.

  1. Create a partial class next to your SomethingSomething. Context.
  2. Use the code at the bottom of this post.
  3. That’s it.