The lower bound of “sdk: ‘>=2.7.0 <3.0.0′” must be 2.12.0’
Posted by
Dharmendra Kumar, Senior Software Engineer & Co founder at MyhospitalNow
–
Error:
The lower bound of "sdk: '>=2.7.0 <3.0.0'" must be 2.12.0'
or higher to enable null safety.
The current Dart SDK (3.2.6) only supports null safety.
For details, see https://dart.dev/null-safety
Solution:
The error message you’re getting suggests that the pubspec.yaml file for your project’s Dart SDK limitations isn’t compatible with the version of Dart needed for null safety. Since Dart 2.12 introduced null safety, you must include a lower bound of 2.12.0 in your SDK restrictions if you wish to use null safety features.
To resolve this error, you should update your pubspec.yaml file to set the Dart SDK constraints as follows:
environment:
sdk: '>=2.12.0 <3.0.0'
As a result, your Dart code will be able to use null safety features. Run flutter pub get or dart pub get to update your dependencies after making this modification.
Dharmendra Kumar, Senior Software Engineer & Co founder at MyhospitalNow
Experienced software developer proficient in HTML, CSS, and Bootstrap for crafting elegant and responsive user interfaces.
Skilled in Laravel and PHP, with a focus on building robust and scalable web applications.
Proficient in JavaScript for both frontend and backend development, leveraging frameworks like React and Vue.js.
Experienced in designing and consuming RESTful APIs to enable seamless communication between client and server.
Expertise in integrating payment gateways such as PayPal, Stripe, and Paytm for secure online transactions.
Familiar with Flutter, enabling the creation of natively compiled applications for mobile, web, and desktop.
Proficient in Android Studio, the primary IDE for developing Android applications.
Knowledgeable in Linux and Docker for efficient server management and application deployment.
Experienced in using Redis as an in-memory data structure store, enhancing application performance.
Passionate about staying updated with the latest technologies and continuously learning to deliver high-quality solutions.
