CODEWITHSUNDEEP
flutter
imane imane
imane imane

Reputation: 159

How to use getApplicationDocumentsDirectory() with flutter for web

I'm a beginner in flutter, i want to use SQlite database using sqflite package in my Flutter App, I'm running my flutter app on chrome because I have the emulator not working, I use getApplicationDocumentsDirectory in the code and i have an error saying :

Error: MissingPluginException(No implementation found for method getApplicationDocumentsDirectory on channel plugins.flutter.io/path_provider)

I read in a post: I ran into this after starting to add web support to an application. The getApplicationDocumentsDirectory function only supports iOS and Android (docs). I added a check for web and changed the way I set the directory which fixed the "No implementation found for method" for me.

To tell if the platform is web use Flutter's kIsWeb:

Then handle setting the directory accordingly:

if (kIsWeb) {
    // Set web-specific directory
} else {
    appDocumentDirectory = await path_provider.getApplicationDocumentsDirectory();
}

but i don't know how to Set web-specific directory.

My code is

    if (_database != null) {
      return _database;
    }
    _database = await _initializeDatabase();
    return _database;
  }

  Future<Database> _initializeDatabase() async {
    Directory directory = await getApplicationDocumentsDirectory();
    String path = join(directory.path, 'annonce_database.db');
    return await openDatabase(path, version: _dbVersion, onCreate: _onCreate);
  }```

Upvotes: 11

Views: 15162

Answers (2)

Venkat.R
Venkat.R

Reputation: 7746

Faced the same issue.

Web Build Error:  Uncaught (in promise) Error: MissingPluginException(No implementation found for method getApplicationDocumentsDirectory on channel plugins.flutter.io/path_provider)

Actual Code

final appDocDir = await getApplicationDocumentsDirectory();

  // Initialize hive.
  await Hive.initFlutter();

  // Register Adapters.
  Hive
    ..init(appDocDir.path)
    ..registerAdapter(ActivityAdapter())
    ..registerAdapter(ActivityTypeModelAdapter());

After Fixing it with kIsWeb

var path = "/assets/db";
if (!kIsWeb) {
  var appDocDir = await getApplicationDocumentsDirectory();
  path = appDocDir.path;
}

// Initialize hive.
await Hive.initFlutter();

// Register Adapters.
Hive
  ..init(path)
  ..registerAdapter(ActivityAdapter())
  ..registerAdapter(ActivityTypeModelAdapter());

enter image description here

Upvotes: 4

fsalazar_sch
fsalazar_sch

Reputation: 455

getApplicationDocumentsDirectory() doesn't works on Web, so using your code, you have to modify th _initializeDatabase() function, and replace with a String path route in order to use it in Web (i.e. assets folder inside the project) Don't forget to import KIsWeb

import 'package:flutter/foundation.dart' show kIsWeb;
...
Future<Database> _initializeDatabase() async {
//here
    if (kIsWeb) {
        String path = "/assets/db";
    } else {
        Directory directory = await getApplicationDocumentsDirectory();
        String path = join(directory.path, 'annonce_database.db');
    }
    return await openDatabase(path, version: _dbVersion, onCreate: _onCreate);
}

Upvotes: 7

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