My Project was on flutter 2.5.3 and we decdied to upgrade code base to flutter latest version (3.7.3) . My version from pubspec.yaml used to be 1.2+10 after upgrading flutter. When I run flutter pub get or any other pub related command i am getting an error Invalid version number: Could not parse 1.2+10.
Here is pubspec.yaml
Please help me fixing the issue. Thanks in advance :)
To quote from the documentation:
A version number is three numbers separated by dots, like 1.2.43
followed by an optional build number separated by a +.
You only have two. So maybe change it to 1.2.0+10
Related
I have received this kind error a couple of time before with different packages, usually i just try a combination of different versions till i finally get a match that works. Is there a way to know what package versions are compatible instead of using the trial error approach which is outright time consuming and exhausting.
Initially i though it could be that one of the packages depends on the other, like in this case maybe flutter_svg depends on a different version of flutter_luban so the version in my pubspec clashes with it, but none of these packages depend on one another after viewing the respective package dependencies.
pub get failed (1; So, because sakaHapa depends on both
flutter_svg ^0.17.4 and flutter_luban ^0.1.13, version solving
failed.)
You can use 'pub outdated' command like below.
https://dart.dev/tools/pub/cmd/pub-outdated
Here is column what means.
Current
The version used in your package, as recorded in pubspec.lock. If the package isn’t in pubspec.lock, the value is -.
Upgradable
The latest version allowed by your pubspec.yaml file. This is the version that dart pub upgrade resolves to. The value is - if the value in the Current column is -.
Resolvable
The latest version that can be resolved, when combined with all other dependencies. This version corresponds to what dart pub upgrade gives you if all version constraints in pubspec.yaml are unbounded. A value of - means that the package won’t be needed.
Latest
The latest version of the package available, excluding prereleases unless you use the option --prereleases.
flutter pub outdated
I am using analyser 1.7.1. The latest build_runner build command generates the following error.
flutter packages pub run build_runner build Failed to precompile
build_runner:build_runner:
../../../sdk/flutter/.pub-cache/hosted/pub.dartlang.org/analyzer-1.7.1/lib/src/error/best_practices_verifier.dart:1998:14:
Error: A non-null value must be returned since the return type
'String' doesn't allow null. String get displayString {
The usual flutter clean and pub cache repair commands don't seem to be fixing the problem, and displayString doesn't appear anywhere in my codebase.
There's an issue open 9 days ago. Here's the key part:
Right now, the current state of affairs is that:
package:analyzer 1.7.0 requires package:meta ^1.4.0
package:analyzer 1.7.1 has the same contents as 1.7.0, but requires package:meta ^1.3.0
Flutter stable pins package:meta to 1.3.0
I'm uncertain how we're running into the exceptions above - the two most recent versions of analyzer are pretty explicit about which version of meta they need.
#edlman do you have any dependency_overrides in your pubspec?
you're right, I'm using 3rd party pkgs which depend on meta 1.4.0 so I put it to dependency_overrides to solve the collision. It didn't come to my mind it cause such a problem.
I've changed the override to 1.3.0, it works fine, no problem yet
So I'd suggest checking whether or not there's a dependency_overrides in your pubspec, too.
It's a problem with analyser 1.7.1.
Add
dependency_overrides:
analyzer: 1.7.0
to pubspec.yaml.
There are more details available in raina77ow's answer.
I'm trying to implement chatbot on flutter and I'm trying to add dependencies "flutter_dialogflow: ^0.1.3" in the pub spec.yaml and got error. Can anyone help me how to fix it?
it seems you have run into a dependency incompatibility. if you have more than 5 or 6 dependencies it will be harder to find where this issue comes from. best option to will be,
Upgrade Flutter to the latest Version.
Upgrade all the dependencies to the latest Version. refer pub.dev when upgrading
I have a project that is developed with Flutter v1.22.6 and was working great, after updating the flutter to v2.0.0 and reading the documentation, I've found out I can use dart migrate --apply-changes to fix issues that are related to flutter upgrade, By running the command I get dozens of errors and the error ends with:
The migration tool didn't start, due to analysis errors.
The following steps might fix your problem:
1. Set the lower SDK constraint (in pubspec.yaml) to a version before 2.12.
2. Run `dart pub get`.
3. Try running `dart migrate` again.
What is the simplest way to migrate the current project to the v2?
The problem is that you have already migrated to a newer version of dart.
You can't migrate your projects from the new version, there is literally nothing to migrate to.
If you want to migrate your older projects (which are without null safety) to a new version, your dart version must be older than 2.12.0 version.
In this case, consider changing the version in your pubspec.yaml file.
environment:
sdk: '>=2.11.0 <3.0.0'
Then run the command in your terminal
> dart migrate --apply-changes
make sure you have following step by step migrate dart 2
and base on your error notification try to set in pubspec.yaml
environment:
# Works in Dart 2 only.
sdk: '>=2.0.0 <3.0.0'
Using Flutter, I am trying to update my dart dependency 2.6.0 but I get an error
Because *project_name* requires SDK version >=2.6.0 <3.0.0, version solving failed.
pub get failed (1)
exit code 1
I want to use the new features that dart offers, such as Extension Methods. How could I go about upgrading my dependency? I have installed the newest stable version of dart on my computer, but regardless I still get that error.
A couple of things that might help:
From this issue, you can try ensuring that you've updated enviroment in your pubspec.yaml file like so:
environment:
sdk: ">=2.0.0-dev.68.0 <3.0.0"
Another thing that might help is just double checking the steps in this post or on the dart installation page to ensure that you've updated to the latest version correctly.