Скачать или смотреть Resolving the undefined method map for nil:NilClass Error When Installing cloud_firestore on macOS

This guide addresses the common error faced when trying to install `cloud_firestore` in Flutter on macOS, specifically on M1 chip devices, and provides a step-by-step solution to resolve it.
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Resolving the undefined method map for nil:NilClass Error When Installing cloud_firestore on macOS

If you're developing a Flutter application on a MacBook, particularly with the M1 chip, you might encounter a frustrating issue when attempting to add the cloud_firestore package. After executing the command flutter pub add cloud_firestore, you’re greeted with an error stating undefined method map for nil:NilClass. This error can leave you feeling stuck, especially after trying various potential solutions without success.

In this guide, we will deeply understand the problem and provide a straightforward solution to get you past this hurdle.

Understanding the Issue

The error in question arises during the execution of pod installs via CocoaPods. It's not an uncommon problem, especially among developers working on Macs with the ARM architecture. The core of the issue is that the CocoaPods system is unable to correctly retrieve necessary dependencies when building the project for iOS.

Previous Attempts at Resolution

While tackling this issue, you may have tried various commands such as:

Using sudo arch -x86_64 gem install ffi and arch -x86_64 pod install

Reinstalling CocoaPods via Homebrew and Ruby

Switching Ruby versions or environments

Creating a new Flutter project

Unfortunately, these methods may not provide a fix, as they do not address the underlying problem effectively.

A Simple and Effective Solution

After persistent troubleshooting, one solution emerged that proved effective: deleting the CocoaPods trunk repo and reinstalling your pods. Follow the steps below to resolve the issue:

Step-by-Step Fix

Open your Terminal: You can do this by searching for "Terminal" in your applications or pressing Command + Space to open Spotlight, and typing "Terminal".

Delete the CocoaPods Trunk Repository:
Use the following command to remove the existing CocoaPods trunk repo:

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

This command deletes the local CocoaPods specs that might be causing the conflict.

Reinstall Your Pods:
Next, navigate to your Flutter project directory (where the podfile is located) and run:

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

This command should take some time as it fetches the necessary dependencies again without the corrupted schemes you had before.

Check for Errors:
Once the installation is complete, ensure that there are no errors displayed in the console. You should see a confirmation that your pods have been installed successfully.

Run Your Application:
Finally, return to Flutter and run your application again using:

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

Your application should now start correctly, allowing you to access Firestore without further issues.

Conclusion

Encountering the undefined method map for nil:NilClass error can be a daunting experience, especially for developers working on macOS with M1 chips. However, by following the outlined steps to remove the CocoaPods cache and reinstall your pods, you can efficiently resolve this issue.

If you continue to face difficulties, consider checking your development environment setup or reaching out to community forums for further assistance. Happy coding, and may your Flutter applications flourish with the integration of Firebase services like Firestore!