Resolving the Flutter Compilation Error with the json_serializable Package

Описание: Learn how to resolve the Flutter compilation error regarding the `json_serializable` package by correcting the file naming conventions.
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This video is based on the question https://stackoverflow.com/q/62317540/ asked by the user 'Ekam Singh' ( https://stackoverflow.com/u/12760706/ ) and on the answer https://stackoverflow.com/a/62317805/ provided by the user 'Michel Feinstein' ( https://stackoverflow.com/u/1227166/ ) at 'Stack Overflow' website. Thanks to these great users and Stackexchange community for their contributions.

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Resolving the Flutter Compilation Error with the json_serializable Package

If you’re diving into Flutter and utilizing the json_serializable package, you might encounter a frustrating compilation error when trying to run your Android emulator. This common pitfall usually stems from naming conventions in your Dart files. In this guide, we’ll break down the issue and how to effectively resolve it.

Understanding the Problem

The error arises due to a mismatch between the file name and the part declaration within your Dart model file. In your case, you’re working with a model for location data that you want to serialize and deserialize effectively. Here’s a snippet of your model file:

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Error Messages

When you try to run your code, Flutter throws the following errors:

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Analyzing the Cause

Case Sensitivity: Dart file names are case-sensitive. If your file is named location.dart, the corresponding part file name should be in lower case (location.g.dart).

Mismatch in Declaration: The part declaration in your model file must exactly match the file name of the generated file for serialization.

The Solution: Correcting the Declaration

To resolve the compilation errors, you'll need to correct the part declaration part in your model file. Here’s how to do it:

Steps to Fix

Open your Location model file: Navigate to your lib/Models/location.dart file in your code editor.

Change the part declaration:

Find the line:

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Change it to:

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Regenerate the Part File:

After making the changes, ensure that you regenerate the *.g.dart file by running:

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Verify the Result

Now that you’ve updated the part declaration, try running your emulator again. The compilation errors related to the json_serializable package should be resolved, and your Flutter application should work smoothly.

Conclusion

Naming conventions in programming can sometimes trip us up, especially in languages with case-sensitive file systems. Remember to always check your file names and part declarations to avoid these common pitfalls. By changing the part declaration from Location.g.dart to location.g.dart, you've resolved the compilation error.

Feel free to reach out if you encounter any further issues with Flutter or the json_serializable package. Happy coding!