[Solved] You have this Spring Boot repository method:List findByStatus(String status);But calling findByStatus(null) throws an error. What is the likely cause? | Spring Boot

Spring Boot - Docker and Deployment

You have this Spring Boot repository method:

List findByStatus(String status);

But calling findByStatus(null) throws an error. What is the likely cause?

AThe database column 'status' is not nullable

BSpring Data JPA does not allow null parameters in query methods

CThe method name is incorrect for null values

DThe repository interface is missing @Repository annotation

Step-by-Step Solution

Solution:

Step 1: Understand Spring Data JPA query parameter rules
Spring Data JPA query methods do not accept null parameters by default and throw errors if null is passed.
Step 2: Exclude other causes
Method name is correct, @Repository is optional on interfaces, and DB nullability does not cause this error.
Final Answer:
Spring Data JPA does not allow null parameters in query methods -> Option B
Quick Check:
Null parameters cause errors in query methods [OK]

Quick Trick: Avoid null in Spring Data JPA query parameters [OK]

Common Mistakes:

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