Question 220850 in Flutter Question posted in
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How to migrate old Flutter project to dart 3

How to migrate old Flutter project to dart 3 with latest Flutter version.

My project works with following:
Flutter version: 3.7.12
sdk: ">=2.11.0 <3.0.0"

When I upgrade Flutter to latest version so I need to migrate the whole project to be compatible with Dart 3 with null safety…
It’s not easy to change the code (like variablers) manually in over 100 files.

Is there any way to migrate a Flutter project and change everything required to run dart 3 using commands in Terminal?

Thanks for help

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2

Answers


  1. 0

    You can use dart migrate command in dart 2.19

    if you want use dart 2.19, use Flutter 3.7.12 with flutter downgrade 3.7.12 command.

    For more information, read this issue

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  2. 0

    Rather than downgrade flutter to ruin your main installation (although temporarily), consider using Puro instead, to maintain multiple versions of flutter at the same time. I have a nice video on that.

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