Invalid redefinition of constant UserApp

[tlorans]

Hello,
I've got a LoadError: invalid redefinition of constant UserApp.
Do you know how to fix it please?

[jrhadams]

I've gotten this same error (see below). Out of curiosity, what version of Julia is needed for this demo? My version info can be found here.

Version

julia> versioninfo()
Julia Version 1.6.2
Commit 1b93d53fc4* (2021-07-14 15:36 UTC)
Platform Info:
  OS: Linux (x86_64-pc-linux-gnu)
  CPU: Intel(R) Core(TM) i7-6500U CPU @ 2.50GHz
  WORD_SIZE: 64
  LIBM: libopenlibm
  LLVM: libLLVM-12.0.1 (ORCJIT, skylake)

Stacktrace

julia> Genie.loadapp()
  Activating environment at `~/Sundry_Repos/Stipple-Demo-IrisClustering/Project.toml`
WARNING: replacing module IrisClustering.
ERROR: LoadError: LoadError: invalid redefinition of constant UserApp
Stacktrace:
  [1] top-level scope
    @ none:1
  [2] eval
    @ ./boot.jl:360 [inlined]
  [3] eval
    @ ./Base.jl:39 [inlined]
  [4] main()
    @ Main.IrisClustering ~/Sundry_Repos/Stipple-Demo-IrisClustering/src/IrisClustering.jl:6
  [5] top-level scope
    @ ~/Sundry_Repos/Stipple-Demo-IrisClustering/src/IrisClustering.jl:9
  [6] include
    @ ./client.jl:444 [inlined]
  [7] main()
    @ Main ~/Sundry_Repos/Stipple-Demo-IrisClustering/bootstrap.jl:6
  [8] top-level scope
    @ ~/Sundry_Repos/Stipple-Demo-IrisClustering/bootstrap.jl:5
  [9] include(fname::String)
    @ Base.MainInclude ./client.jl:444
 [10] top-level scope
    @ ~/.julia/packages/Genie/Uvtzb/src/Genie.jl:187
in expression starting at /home/user/Sundry_Repos/Stipple-Demo-IrisClustering/src/IrisClustering.jl:1
in expression starting at /home/user/Sundry_Repos/Stipple-Demo-IrisClustering/bootstrap.jl:5

[tlorans]

I've solved the problem: this is due to the fact that the model is set as constant. Then if something went wrong the first time you've load the app, please make sure to retry in a clean workspace (the easier way is to close your current Julia REPL and to open another one).
By the way, the graph will not work as it is defined with a deprecated DataFrames syntax. In the line 46 of the routes.jl file, be sure to replace "for r in eachrow(data[data[cluster_column] .== s, :])" by "for r in eachrow(data[data[:,cluster_column] .==s,:])"

[jrhadams]

Thanks, @tlorans . For the record, when I've loaded the app from the StippleDemo's repo, I had no issues loading the app. 🤷

[tlorans]

Yes this is because in the StippleDemo's repo all the app is within one script, while in the Stipple-Demo-IrisClustering you have a definition of this UserApp as a constant within a file.
To understand all these steps, I encourage you to take a look at the documentation: https://genieframework.github.io/Genie.jl/dev/
In fact, Stipple projects are directly based on the Genie app architecture. And finally with this documentation I've achieved my first web app :).
Be brave, it's worth it!

[jrhadams]

I appreciate the encouragement. In fact, I've been spending the whole morning looking at Genie for an API backend and went down the stipple rabbit hole. Exciting stuff!