windows heroku run rake db:migrate error “/usr/bin/env: ruby.exe: No such file or directory”

Question

I\'m pretty new to Rails here and I\'ve followed Ruby on Rails Tutorial for most of it. I have since decided to make my own application, but using the Rails 4 gem in beta. I

Answer 1

I had this same problem, changed ruby.exe to ruby in the three files as described above, executed the

    git push heroku master

step, which told me everything was up to date. Trying the

    heroku run rake db:migrate

step again, it still didn't work; I got the same error about no such file or directory for ruby.exe. I examined my gemfile.lock as directed, but didn't see anything that looked windows-y.

I then executed these:

    git add .
    git commit -m "My comment"

and tried again with

    git push heroku master

This time, boatloads of messages went by, including:

    Removing Gemfile.lock because it was generated on Windows.

so perhaps there was something wrong with it and I just didn't know what I should be looking for in it.

Trying again to

    heroku run rake db:migrate

looks to have worked, as I got

    Running rake db:migrate attached to terminal... up, run.3260
    ==  CreateUsers: migrating ====================================================
    -- create_table(:users)
       -> 0.0409s
    ==  CreateUsers: migrated (0.0412s) ===========================================

My best guess is that the change to remove the .exe from bundle, rake, and rails did not actually get pushed up on the first try of git push heroku master and the git add . and git commit -m "My comment" were necessary to make it get pushed up. This is my first attempt at anything with git/heroku/ruby, so I don't know enough to say why the other two commands were required, but leave my experience documented here in case it helps anybody else.
Thanks so much for the clue above that it was the .exe in those three files that caused the problem.