Better Error Message If No Backend Installed

[rmorshea]

Current Situation

I think a lot of people get confused by this error message:

Proposed Actions

We should suggest installing a particular backend in the error message (e.g. pip install reactpy[starlette]).

[geckguy]

can i work on this issue?

[Smit-Parmar]

Sure @geckguy
@rmorshea Can you please provide step to reproduce?

[rmorshea]

Sure. This error happens when you haven't installed any of the built-in backends. For example, if you only run pip install reactpy instead of running say, pip install reactpy[starlette]. In the case of the former, when you try and use reactpy.run to execute your application, you'll see the error shown above.

So really, all we need here is a more detailed message that suggests a solution to the problem rather then just saying that we couldn't find an installed backend. The message in question can be found here.

[geckguy]

Sure. This error happens when you haven't installed any of the built-in backends. For example, if you only run pip install reactpy instead of running say, pip install reactpy[starlette]. In the case of the former, when you try and use reactpy.run to execute your application, you'll see the error shown above.

So really, all we need here is a more detailed message that suggests a solution to the problem rather then just saying that we couldn't find an installed backend. The message in question can be found here.

Okay so in the error message should it suggest possible fixes or should it suggest the exact fix for the problem? for instance possible fix could be to suggest a list of commands that might help them fix the problem

[rmorshea]

Given that the user, having only installed reactpy, probably doesn't care what backend they're using, I think we can specifically suggest that they pip install "reactpy[starlette]". With that said, we can also mention that you can substitute starlette for any of the other supported backends using reactpy.backend.utils.SUPPORTED_PACKAGES .

[rmorshea]

If you're able to get this done in the next day or two we can put this out in a 1.0.1 release.

[geckguy]

Given that the user, having only installed reactpy, probably doesn't care what backend they're using, I think we can specifically suggest that they pip install "reactpy[starlette]". With that said, we can also mention that you can substitute starlette for any of the other supported backends using reactpy.backend.utils.SUPPORTED_PACKAGES .

Got it! i am already on it