How to upgrade packages in VSCode/flutter?

Question

I'm using VS Code on a flutter project. I just edited pubspec.yaml to point to a later version of a package, and it automatically ran 'flutter packages get'. In my '/development//flutter/.pub-cache/hosted/pub.dartlang.org' directory, I can see both versions. But when I compile, it looks like it's still using the old version. I tried various things like 'flutter packages upgrade', 'flutter clean', etc., but to no avail. Looking at the 2 package versions' source code, I can see the change I want in the newer version. How do I point to the new package? Thanks.

Update:

It's the 'ethereum' package that's not updating. I had used the 3.0.0 version (method expects 2 args), and then switched to the 3.1.0 version (method expects 3 args). But compiling with a 3 arg call balks with incorrect argument count:

client.admin.personalSendTransaction(BigInt.parse(currentAddress), currentPassword,{});

[dart] Too many positional arguments: 2 expected, but 3 found. [extra_positional_arguments_could_be_named]

Yet hovering over the method call does show it expects 3 args:

personalSendTransaction(BigInt address, String passphrase, {BigInt to, BigInt data, int gas, int gasPrice, int value, int nonce, int condition, bool conditionIsTimestamp: false}) → Future<BigInt>

pubspec.yaml:

    dependencies:
  flutter:
    sdk: flutter

  # The following adds the Cupertino Icons font to your application.
  # Use with the CupertinoIcons class for iOS style icons.
  cupertino_icons: ^0.1.2

  # Get package(s) for talking to ethereum node
  # web3dart: '>=0.3.0'
  ethereum: ^3.1.0

  # read barcodes and QR codes
  barcode_scan: ^0.0.3

  # Generate a QR code
  qr: ^1.0.1

  # Display as actual symbol
  qr_flutter: ^1.1.5

dev_dependencies:
  flutter_test:
    sdk: flutter

In pubspec.lock:

  ethereum:
    dependency: "direct main"
    description:
      name: ethereum
      url: "https://pub.dartlang.org"
    source: hosted
    version: "3.1.0"

Version 3.1.0 is what I want to be used.

Running 'flutter packages upgrade resolved' yields:

[Gregorys-iMac]:(gkd) ~/Programs/wine_track $ flutter packages upgrade resolved
Running "flutter packages upgrade" in ....                   2.7s

In the package cache, I have both:

/Users/gkd/development//flutter/.pub-cache/hosted/pub.dartlang.org/ethereum-3.0.0/lib/src/api/ethereum_api_admin.dart

/Users/gkd/development//flutter/.pub-cache/hosted/pub.dartlang.org/ethereum-3.1.0/lib/src/api/ethereum_api_admin.dart

Answer 1

flutter pub upgrade --major-versions

Answer 2

you can simply run flutter packages upgrade in your project to upgrade all the packages. this feature is available from flutter version 1.17

Answer 3

Just use

flutter pub upgrade --major-versions

or

flutter packages upgrade