Скачать или смотреть How to Fix java.lang.NoSuchFieldError: TREATED_PATH in QueryDSL with Spring Boot

Discover how to resolve the `java.lang.NoSuchFieldError: TREATED_PATH` error encountered while using QueryDSL in a Spring Boot application. This guide includes step-by-step instructions to ensure compatibility between dependencies.
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How to Fix java.lang.NoSuchFieldError: TREATED_PATH in QueryDSL with Spring Boot

If you encounter the error java.lang.NoSuchFieldError: TREATED_PATH while using QueryDSL in your Spring Boot application, don’t worry; you’re not alone. This issue typically arises due to conflicting versions of QueryDSL dependencies in your project. In this guide, we'll explain the cause of this error and provide a straightforward solution.

Understanding the Problem

The Error

The NoSuchFieldError indicates that your code is trying to access a field that does not exist in the class definition at runtime. In many cases, this occurs due to version mismatches between libraries. The specific error message you're seeing, java.lang.NoSuchFieldError: TREATED_PATH, is linked to the QueryDSL library.

Scenario

In this instance, you're using Spring Boot version 2.5.1 and Java 1.8. The error happens during the execution of your database query, particularly when you call selectFrom() on your JPAQueryFactory. The critical hint here is that there’s a mismatch in the versions of the QueryDSL libraries you’re using.

Analyzing Your Dependencies

From the provided code snippet, we can see that you are including two QueryDSL dependencies:

[[See Video to Reveal this Text or Code Snippet]]

However, you may unintentionally be mixing these with an older version of querydsl-core, likely version 4.4.x. This discrepancy often results from other dependencies that transitively bring in older versions of QueryDSL.

Solution: Aligning Dependency Versions

To resolve this issue, you need to ensure all QueryDSL components are the same version. This means explicitly adding the correct version of the querydsl-core library to your pom.xml file. Here’s how you can do this:

Step-by-step Fix

Edit Your pom.xml: Add the following dependency to ensure that both querydsl-jpa and querydsl-core are aligned with version 5.0.0.M1.

[[See Video to Reveal this Text or Code Snippet]]

Rebuild Your Project: After making the changes, rebuild your project to ensure that all dependencies are properly updated.

Test Your Application: Run your Spring Boot application again and check if the error persists.

Additional Considerations

Check Transitive Dependencies: If the error continues, inspect your project's dependency tree for any other libraries that might be pulling in older versions of QueryDSL. Use the command mvn dependency:tree to view this information.

Update Related Libraries: Ensure that none of the other libraries you're using cause conflicts with QueryDSL.

Conclusion

By ensuring that all QueryDSL dependencies are on the same version, you can effectively resolve the java.lang.NoSuchFieldError: TREATED_PATH error. Maintaining consistent library versions is crucial in any Java project to avoid runtime errors. Following the steps outlined in this post will help you get your Spring Boot application running smoothly with QueryDSL.

If you have any further questions or need additional assistance, feel free to leave a comment below!