How to Use Spring Data JPA's findBy for Multiple Fields with Containing Clause

What is the Spring Data JPA method to use findBy for multiple fields and also utilize a Containing clause for all fields?

public interface UserRepository extends JpaRepository<User, Long> {
    List<User> findByFirstNameContainingAndLastNameContaining(String firstName, String lastName);
}

In Spring Data JPA, the `findBy` method is a powerful way to query your database based on entity attributes. When you need to filter results across multiple fields, you can combine these criteria using `Containing` to perform partial matches against strings. This guide will explain how to implement such queries effectively.

public interface UserRepository extends JpaRepository<User, Long> {
    List<User> findByFirstNameContainingAndLastNameContaining(String firstName, String lastName);
}

Causes

• Not understanding the syntax of method naming conventions in Spring Data JPA.
• Confusion about how to combine multiple search criteria in a single query.
• Incorrectly using the `Containing` keyword with non-string data types.

Solutions

• Use `findBy<Property>Containing` for each string field you want to search partially.
• Combine multiple fields in the method signature to enable searching across all specified fields.
• Make sure that your fields in the entity are of type `String` to correctly use the `Containing` clause.

Mistake: Using the wrong method names or attributes in the `findBy` clause.

Solution: Check the naming conventions provided by the Spring Data JPA documentation to ensure correct field mapping.

Mistake: Not including the `Containing` clause for each field needing partial matching.

Solution: Remember to apply `Containing` for each string field in the repository method.