Скачать или смотреть Resolving Firebase Cloud Firestore CRUD Operations Issues in Flutter Apps

Learn how to tackle issues with displaying and storing data correctly in your Flutter app using Firebase Cloud Firestore.
---
This video is based on the question https://stackoverflow.com/q/77162434/ asked by the user 'Rachita Dongre' ( https://stackoverflow.com/u/17762181/ ) and on the answer https://stackoverflow.com/a/77168541/ provided by the user 'Rachita Dongre' ( https://stackoverflow.com/u/17762181/ ) at 'Stack Overflow' website. Thanks to these great users and Stackexchange community for their contributions.

Visit these links for original content and any more details, such as alternate solutions, latest updates/developments on topic, comments, revision history etc. For example, the original title of the Question was: Firebase cloud firestore CRUD operations not performing

Also, Content (except music) licensed under CC BY-SA https://meta.stackexchange.com/help/l...
The original Question post is licensed under the 'CC BY-SA 4.0' ( https://creativecommons.org/licenses/... ) license, and the original Answer post is licensed under the 'CC BY-SA 4.0' ( https://creativecommons.org/licenses/... ) license.

If anything seems off to you, please feel free to write me at vlogize [AT] gmail [DOT] com.
---
Troubleshooting Firebase Cloud Firestore CRUD Operations in Your Flutter App

Creating an application using Flutter and Firebase can be an exciting journey, particularly when bringing concepts like reminders for medication to life. However, like any development pathway, it isn't without its hurdles. Recently, a common issue arose regarding Firebase Cloud Firestore CRUD operations, where the data added to the database isn't reflected in the app as expected. In this guide, we'll dissect this problem, focusing on two primary issues: data visibility and correct document structure in Firestore.

The Problem

In the scenario presented, the Flutter app serves as a medicine reminder tool, allowing users to set reminders and track their medications. However, users experienced two main challenges:

Data not displaying on the home screen: Although new medications were being successfully added to the Firestore database, they were not visible in the app's user interface.

Incorrectly structured document ID: Each user's medicine should be linked to their unique user ID, ensuring personalized data isn't mixed up between different users.

The Impact

Users were left confused with messages stating "nothing to show," despite confirming their medicines had been successfully added through the Firebase console. Additionally, the document IDs did not align with the users' unique identifiers, complicating data retrieval and management.

Solution Breakdown

Let's delve into the solutions for each of the identified issues.

1. Ensuring Data Displays Correctly

The app relies on StreamBuilder to listen for document changes in the Firestore database. Here’s the relevant code snippet for displaying medication:

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

To retrieve the correct data for a user, the Firestore collection must be accurately referenced:

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

Make sure that the userID variable is being set correctly. This must reflect the currently authenticated user's unique ID to pull the right documents from the intended sub-collection.

2. Correcting Document Structure and ID Management

The initial issue arose from the app incorrectly assigning newly added medicines to a generic 'Medicines' collection rather than a personalized sub-collection. Here's how you can resolve this:

Modify the addMedicine function: Pass the current user's UID into your addMedicine method within the Database class. Here’s the revised structure:

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

Accessing userID: Ensure to retrieve and pass the user's UID effectively whenever you call addMedicine:

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

Conclusion

By implementing these changes, users will see their data displayed appropriately in the app, and each medicine entry will be accurately linked to their unique user ID, ensuring a clean and user-friendly experience. As you build your app, it’s critical to ensure that data alignment and accessibility are thoroughly checked to avoid similar issues down the line.

Happy coding and best of luck with your Flutter and Firebase journey!