ruby on rails - Error with heroku run rake db:migrate - Errno::ENOENT: No such file or directory - /app/db/schema.rb -

i trying project working on heroku when trying run "rake db:migrate" got following

any idea????

thanks :)

p.d: think probles here

** execute db:schema:dump rake aborted! 

because

rake tasks write disk, such rake db:schema:dump, not compatible heroku’s ephemeral filesystem.

---

   ps c:\users\siel3\documents\nimbus> heroku run rake db:migrate --trace running `rake db:migrate --trace` attached terminal... up, run.6524 ** invoke db:migrate (first_time) ** invoke environment (first_time) ** execute environment ** invoke db:load_config (first_time) ** execute db:load_config ** execute db:migrate ** invoke db:_dump (first_time) ** execute db:_dump ** invoke db:schema:dump (first_time) ** invoke environment ** invoke db:load_config ** execute db:schema:dump rake aborted! errno::enoent: no such file or directory - /app/db/schema.rb /app/vendor/bundle/ruby/2.0.0/gems/activerecord-4.0.2/lib/active_record/railties/databases.rake:243:in `initialize' /app/vendor/bundle/ruby/2.0.0/gems/activerecord-4.0.2/lib/active_record/railties/databases.rake:243:in `open' /app/vendor/bundle/ruby/2.0.0/gems/activerecord-4.0.2/lib/active_record/railties/databases.rake:243:in `block (3 levels)  in <top (required)>' /app/vendor/bundle/ruby/2.0.0/gems/rake-10.4.2/lib/rake/task.rb:240:in `call' /app/vendor/bundle/ruby/2.0.0/gems/rake-10.4.2/lib/rake/task.rb:240:in `block in execute' /app/vendor/bundle/ruby/2.0.0/gems/rake-10.4.2/lib/rake/task.rb:235:in `each' /app/vendor/bundle/ruby/2.0.0/gems/rake-10.4.2/lib/rake/task.rb:235:in `execute' /app/vendor/bundle/ruby/2.0.0/gems/rake-10.4.2/lib/rake/task.rb:179:in `block in invoke_with_call_chain' /app/vendor/ruby-2.0.0/lib/ruby/2.0.0/monitor.rb:211:in `mon_synchronize' /app/vendor/bundle/ruby/2.0.0/gems/rake-10.4.2/lib/rake/task.rb:172:in `invoke_with_call_chain' /app/vendor/bundle/ruby/2.0.0/gems/rake-10.4.2/lib/rake/task.rb:165:in `invoke' /app/vendor/bundle/ruby/2.0.0/gems/activerecord-4.0.2/lib/active_record/railties/databases.rake:50:in `block (2 levels) in <top (required)>' /app/vendor/bundle/ruby/2.0.0/gems/rake-10.4.2/lib/rake/task.rb:240:in `call' /app/vendor/bundle/ruby/2.0.0/gems/rake-10.4.2/lib/rake/task.rb:240:in `block in execute' /app/vendor/bundle/ruby/2.0.0/gems/rake-10.4.2/lib/rake/task.rb:235:in `each' /app/vendor/bundle/ruby/2.0.0/gems/rake-10.4.2/lib/rake/task.rb:235:in `execute' /app/vendor/bundle/ruby/2.0.0/gems/rake-10.4.2/lib/rake/task.rb:179:in `block in invoke_with_call_chain' /app/vendor/ruby-2.0.0/lib/ruby/2.0.0/monitor.rb:211:in `mon_synchronize' /app/vendor/bundle/ruby/2.0.0/gems/rake-10.4.2/lib/rake/task.rb:172:in `invoke_with_call_chain' /app/vendor/bundle/ruby/2.0.0/gems/rake-10.4.2/lib/rake/task.rb:165:in `invoke' /app/vendor/bundle/ruby/2.0.0/gems/activerecord-4.0.2/lib/active_record/railties/databases.rake:45:in `block (2 levels) in <top (required)>' /app/vendor/bundle/ruby/2.0.0/gems/rake-10.4.2/lib/rake/task.rb:240:in `call' /app/vendor/bundle/ruby/2.0.0/gems/rake-10.4.2/lib/rake/task.rb:240:in `block in execute' /app/vendor/bundle/ruby/2.0.0/gems/rake-10.4.2/lib/rake/task.rb:235:in `each' /app/vendor/bundle/ruby/2.0.0/gems/rake-10.4.2/lib/rake/task.rb:235:in `execute' /app/vendor/bundle/ruby/2.0.0/gems/rake-10.4.2/lib/rake/task.rb:179:in `block in invoke_with_call_chain' /app/vendor/ruby-2.0.0/lib/ruby/2.0.0/monitor.rb:211:in `mon_synchronize' /app/vendor/bundle/ruby/2.0.0/gems/rake-10.4.2/lib/rake/task.rb:172:in `invoke_with_call_chain' /app/vendor/bundle/ruby/2.0.0/gems/rake-10.4.2/lib/rake/task.rb:165:in `invoke' /app/vendor/bundle/ruby/2.0.0/gems/rake-10.4.2/lib/rake/application.rb:150:in `invoke_task' /app/vendor/bundle/ruby/2.0.0/gems/rake-10.4.2/lib/rake/application.rb:106:in `block (2 levels) in top_level' /app/vendor/bundle/ruby/2.0.0/gems/rake-10.4.2/lib/rake/application.rb:106:in `each' /app/vendor/bundle/ruby/2.0.0/gems/rake-10.4.2/lib/rake/application.rb:106:in `block in top_level' /app/vendor/bundle/ruby/2.0.0/gems/rake-10.4.2/lib/rake/application.rb:115:in `run_with_threads' /app/vendor/bundle/ruby/2.0.0/gems/rake-10.4.2/lib/rake/application.rb:100:in `top_level' /app/vendor/bundle/ruby/2.0.0/gems/rake-10.4.2/lib/rake/application.rb:78:in `block in run' /app/vendor/bundle/ruby/2.0.0/gems/rake-10.4.2/lib/rake/application.rb:176:in `standard_exception_handling' /app/vendor/bundle/ruby/2.0.0/gems/rake-10.4.2/lib/rake/application.rb:75:in `run' /app/vendor/bundle/ruby/2.0.0/gems/rake-10.4.2/bin/rake:33:in `<top (required)>' /app/vendor/bundle/ruby/2.0.0/bin/rake:23:in `load' /app/vendor/bundle/ruby/2.0.0/bin/rake:23:in `<main>' tasks: top => db:schema:dump 

do not have db/schema.rb file in application? file should in applicationname/db/schema.rb if first upload heroku maybe try run rake db:seed first create schema file, migrations after.