ruby on rails - Postgres Error when Deploying to Digital Ocean Droplet -


i keep getting error while trying deploy app digital ocean droplet using capistrano's cap production deploy. error message says:

rake aborted! gem::loaderror: specified 'postgresql' database adapter, gem not loaded. add `gem 'pg'` gemfile

but gemfile include pg in production:

... group :production    gem 'rails_12factor'   gem 'pg'   end ...

what can causing this?

new development:

i tried resetting db adapter sqlite3, see whether deployment go through, , got same error:

gem::loaderror: specified 'sqlite3' database adapter, gem not loaded. add `gem 'sqlite3'` gemfile

it turned out known bug win users. in gemfile.lock, change

sqlite3 (1.3.10-x86-mingw32)

to 

sqlite3 (1.3.10-x64-mingw32)

i did directly in repo because each time made change locally , ran bundle install, x64 flag kept getting switched back.


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