`PathElementException` Could not resolve property 'ANumber' of 'model.Case' when property names start with two uppercase letters

[aroc725]

One of the applications my team and I maintain has a “Case” model class with a String attribute named “aNumber”.

Adding a method named “findByANumber” to the associated repository interface results in multiple unit-test failures, with some tests failing due to the following error message:

PathElementException: Could not resolve property 'ANumber' of 'model.Case'

Does anyone know why this is happening, and if so, how to fix this ?

[mp911de]

If you would like us to spend some time helping you to diagnose the problem, please spend some time describing it and, ideally, providing a minimal yet complete sample that reproduces the problem.
You can share it with us by pushing it to a separate repository on GitHub or by zipping it up and attaching it to this issue.

[spring-projects-issues]

If you would like us to look at this issue, please provide the requested information. If the information is not provided within the next 7 days this issue will be closed.

[aroc725]

I've attached a ZIP file containing sample code for re-creating the error, by running tests.

Demo-Spring-Boot-App.zip

[mp911de]

This is a duplicate of #1955.

The correct property name is aNumber and updating the repository to findByaNumber(…) will achieve what you're looking for. Hibernate iterates over declared fields in the mentioned arrangement and uses the field name as property name (aNumber).

If you however decided to define @Access(AccessType.PROPERTY), then Hibernate will use property accessors to derive property names. In that case, Hibernate will use ANumber as a property name and findByANumber(…) will work for you.

Generally, Spring Data follows Bean property naming rules along with Introspector.decapitalize(…) to obtain property names. When a property name has an uppercase second letter, capitalization retains the property name as-is.

Let me know if there's anything else we can help you with.