The latest articles on DEV Community by chaithanna (@chaithanna2425). https://dev.to/chaithanna2425 https://media2.dev.to/dynamic/image/width=90,height=90,fit=cover,gravity=auto,format=auto/https:%2F%2Fdev-to-uploads.s3.us-east-2.amazonaws.com%2Fuploads%2Fuser%2Fprofile_image%2F4086818%2F3bb75eac-03dd-4303-89d6-ec373b77980b.png https://dev.to/chaithanna2425 en chaithanna Thu, 20 Aug 2026 14:50:11 +0000 https://dev.to/chaithanna2425/fixing-range-validation-in-cvat-2hl7 https://dev.to/chaithanna2425/fixing-range-validation-in-cvat-2hl7 <p><em>This is a submission for DEV's Summer Bug Smash: Clear the Lineup (<a href="https://dev.to">https://dev.to</a>) powered by Sentry (<a href="https://sentry.io" rel="noopener noreferrer">https://sentry.io</a>).</em></p> <h2> Project Overview </h2> <p>For this hackathon, I contributed to <strong>CVAT (Computer Vision Annotation Tool)</strong>, an industry-standard open-source platform used by teams worldwide to annotate image and video datasets for machine learning models.</p> <h2> The Bug </h2> <p>While working inside CVAT's raw label text editor, users encountered a frustrating validation issue (#11034). When attempting to input perfectly valid numerical range configurations (such as <code>1;4;1</code>), the validation engine incorrectly treated the numbers as duplicate strings. </p> <p>Because the code mistook the formatted range layout for repetitive data, it triggered a false alarm and threw an incorrect <code>Label name must be unique</code> error. This completely blocked users from saving valid label schemas.</p> <h2> My Fix </h2> <p>I implemented a precise patch inside the <code>validateLabels</code> function located in <code>raw-viewer.tsx</code> to handle these range strings intelligently.</p> <p>Instead of letting the validation array look at the raw input string directly, I introduced a targeted regular expression filter (<code>/^\d+;\d+;\d+$/</code>). This logic automatically identifies incoming numerical range structures and temporarily swaps them with unique, randomized placeholder tokens during the uniqueness check phase. </p> <p>This simple yet effective intercept successfully clears the false-duplicate blocker while keeping CVAT's core security validation perfectly intact.</p> <p>The codebase successfully compiled with the new change, and all automated testing suites on the repository have officially passed verification!</p> <h2> Verified Pull Request Link </h2> <p><a href="https://github.com/cvat-ai/cvat/pull/11062" rel="noopener noreferrer">https://github.com/cvat-ai/cvat/pull/11062</a></p> devchallenge bugsmash