Generate a Json Serializable Generator using Build Runner in Flutter: Response is Succeeded, but no output is being generated

Question

I have an issue when trying to generate a Json Serializable Generator using Build Runner in Dart. First, I tried to do run flutter packages pub run build_runner build to generate Json Serializable but it showed that it has a conflicting issue. So I run command --delete-conflicting-outputs, to solve the conflicting issue.

After that I tried to run flutter packages pub run build_runner build again to regenerate the Json value. But the result that i got is like this:

succeeded with no outputs

So the output was : [INFO] Succeeded after 137ms with 0 outputs (0 actions)

I get so stressed because of it because all of generated-files were deleted. can somebody tell me what was happening and how to solve this issue?

I have been checking everywhere but still haven't found an answer.

Did you add `@JsonSerializable()` annotation to your classes? Did you create a `build.yaml`, if yes, what does it contain? — Günter Zöchbauer, Feb 28 '19 at 06:25
Yes I add a @JsonSerializable(). but I didn't create the build.yaml, i only have the pubspec.yaml and it was ok before i run the --delete-conflicting-outputs — flutteria, Feb 28 '19 at 06:46
Use this command: flutter packages pub run build_runner build --delete-conflicting-outputs — M Karimi, Aug 18 '22 at 09:08

score 10 · Answer 1 · edited Mar 01 '21 at 13:09

10

flutter pub run build_runner watch --delete-conflicting-outputs

edited Mar 01 '21 at 13:09

Tomerikoo

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answered Mar 01 '21 at 12:47

gowthaman C

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Please consider adding some explanation to what the exact purpose of this command is – mousetail Mar 01 '21 at 15:48
1

You saved my day. It works. It generates fromJson and toJson methods based on latest changes. Surprisingly it's not generated during build by default :O – Krzysztof Cieśliński May 09 '21 at 20:30

score 1 · Answer 2 · answered Oct 26 '21 at 19:53

You should update your pubspec

dependencies:
  # Your other regular dependencies here
  json_annotation: <latest_version>

dev_dependencies:
  # Your other dev_dependencies here
  build_runner: <latest_version>
  json_serializable: <latest_version>

then run flutter pub run build_runner build

score 0 · Answer 3 · answered Jul 25 '19 at 09:17

0

Make sure the name of the .g.dart is written properly.

I ran into the same issue came here looking for a solution and when did not find one I noticed the name of the file to be generated is case sensitve.

answered Jul 25 '19 at 09:17

ammar188

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score 0 · Answer 4 · answered Aug 18 '20 at 16:56

0

For me it was not having the files underneath the /lib or /bin directories.

Checklist

Here's a checklist of things to check when Json_serializable generator has succeeded with no outputs, but no files are generated.

answered Aug 18 '20 at 16:56

Baker

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score 0 · Answer 5 · answered Jul 19 '23 at 03:32

0

Try this:

dart run build_runner build --delete-conflicting-output

answered Jul 19 '23 at 03:32

Priyanshi Pandya

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2

Generate a Json Serializable Generator using Build Runner in Flutter: Response is Succeeded, but no output is being generated

5 Answers5

Checklist