[FIXED] What is the difference between findById() and existsById() in Spring Data 2.0?

Issue

Spring Data 2.0 JpaRepository: difference between findById() and existsById()

• Which scenario do we use findById() and existsById() methods?

Solution

According to documentation:

existsById(ID id) - returns boolean

Returns whether an entity with the given id exists.

findById(ID id) - returns Optional (object)

Retrieves an entity by its id.

Simple as that - findById() returns object, which you are searching for, existsById() returns true/false whether or not entity exists in repository.

Answered By - MattIT
Answer Checked By - Willingham (JavaFixing Volunteer)