Cannot migrate on Heroku - ruby-on-rails

Question

I'd like to migrate database to production environment on Heroku.
I typed the following code, however I got error. I have no idea what to do. I'm looking forward to your advice. Thank you for your kindness.
$ heroku run rake db:migrate
Running `rake db:migrate --trace` attached to terminal... up, run.2338
rake aborted!
LoadError: libruby.so.2.2: cannot open shared object file: No such file or directory - /app/vendor/bundle/ruby/2.2.0/gems/pg-0.18.2/lib/pg_ext.so
/app/vendor/bundle/ruby/2.2.0/gems/activesupport-4.2.1/lib/active_support/dependencies.rb:274:in `require'
/app/vendor/bundle/ruby/2.2.0/gems/activesupport-4.2.1/lib/active_support/dependencies.rb:274:in `block in require'
/app/vendor/bundle/ruby/2.2.0/gems/activesupport-4.2.1/lib/active_support/dependencies.rb:240:in `load_dependency'
/app/vendor/bundle/ruby/2.2.0/gems/activesupport-4.2.1/lib/active_support/dependencies.rb:274:in `require'
/app/vendor/bundle/ruby/2.2.0/gems/pg-0.18.2/lib/pg.rb:4:in `<top (required)>'
/app/vendor/bundle/ruby/2.2.0/gems/bundler-1.9.7/lib/bundler/runtime.rb:76:in `require'
/app/vendor/bundle/ruby/2.2.0/gems/bundler-1.9.7/lib/bundler/runtime.rb:76:in `block (2 levels) in require'
/app/vendor/bundle/ruby/2.2.0/gems/bundler-1.9.7/lib/bundler/runtime.rb:72:in `each'
/app/vendor/bundle/ruby/2.2.0/gems/bundler-1.9.7/lib/bundler/runtime.rb:72:in `block in require'
/app/vendor/bundle/ruby/2.2.0/gems/bundler-1.9.7/lib/bundler/runtime.rb:61:in `each'
/app/vendor/bundle/ruby/2.2.0/gems/bundler-1.9.7/lib/bundler/runtime.rb:61:in `require'
/app/vendor/bundle/ruby/2.2.0/gems/bundler-1.9.7/lib/bundler.rb:134:in `require'
/app/config/application.rb:7:in `<top (required)>'
/app/Rakefile:4:in `require'
/app/Rakefile:4:in `<top (required)>'
/app/vendor/ruby-2.2.2/lib/ruby/2.2.0/rake/rake_module.rb:28:in `load'
/app/vendor/ruby-2.2.2/lib/ruby/2.2.0/rake/rake_module.rb:28:in `load_rakefile'
/app/vendor/ruby-2.2.2/lib/ruby/2.2.0/rake/application.rb:689:in `raw_load_rakefile'
/app/vendor/ruby-2.2.2/lib/ruby/2.2.0/rake/application.rb:94:in `block in load_rakefile'
/app/vendor/ruby-2.2.2/lib/ruby/2.2.0/rake/application.rb:176:in `standard_exception_handling'
/app/vendor/ruby-2.2.2/lib/ruby/2.2.0/rake/application.rb:93:in `load_rakefile'
/app/vendor/ruby-2.2.2/lib/ruby/2.2.0/rake/application.rb:77:in `block in run'
/app/vendor/ruby-2.2.2/lib/ruby/2.2.0/rake/application.rb:176:in `standard_exception_handling'
/app/vendor/ruby-2.2.2/lib/ruby/2.2.0/rake/application.rb:75:in `run'
/app/bin/rake:8:in `<main>'

Answer 1

Have you tried running migration directly from the bash inside the heroku server? If not, try the following...
heroku run bash --app your_app_name_goes_here
bundle exec rake db:migrate
First line of code opens the bash command terminal and the second one migrates the db as usual.
This would not be the suggested solution. But, in case you DO NOT care about losing data in the database, you can try and reset the database first and try again. Again, don't do this unless you are willing to lose existing data!
heroku pg:reset DATABASE
heroku run rake db:migrate
However you can perform this via bash as before.
Hope this helps you out.

Answer 2

You can run a dyno in the background using heroku run:detached. Unlike heroku run, these dynos will send their output to your logs instead of your console window. You can use heroku logs to view the output from these commands:$ heroku run:detached rake db:migrate
Running rake db:migrate... up, run.2
Use 'heroku logs -p run.2' to view the log output.