Rails : Application Error on heroku

Question

I successfully deployed my app to heroku then did heroku open I got Application Error on my web page. I did heroku restart and tried but didn't work. I did heroku logs and heroku run rails console but still confused what error I got for. Below is what I am lookig to find error.

2016-09-16T14:06:10.615311+00:00 heroku[web.1]: Starting process with command bin/rails server -p 29036 -e production 2016-09-16T14:06:13.802759+00:00 app[web.1]: => Booting WEBrick 2016-09-16T14:06:13.802787+00:00 app[web.1]: => Rails 4.2.5.1 application starting in production on http://0.0.0.0:29036 2016-09-16T14:06:13.802788+00:00 app[web.1]: => Run rails server -h for more startup options 2016-09-16T14:06:13.802788+00:00 app[web.1]: => Ctrl-C to shutdown server 2016-09-16T14:06:13.802789+00:00 app[web.1]: Exiting 2016-09-16T14:06:13.802793+00:00 app[web.1]: /app/vendor/ruby-2.3.0/lib/ruby/2.3.0/psych/visitors/to_ruby.rb:319:in block in visit_Psych_Nodes_Alias': Cannot loadRails.application.database_configuration: (Psych::BadAlias) 2016-09-16T14:06:13.802793+00:00 app[web.1]: Unknown alias: default 2016-09-16T14:06:13.802794+00:00 app[web.1]: from /app/vendor/ruby-2.3.0/lib/ruby/2.3.0/psych/visitors/to_ruby.rb:319:infetch' 2016-09-16T14:06:13.802795+00:00 app[web.1]: from /app/vendor/ruby-2.3.0/lib/ruby/2.3.0/psych/visitors/to_ruby.rb:319:in visit_Psych_Nodes_Alias' 2016-09-16T14:06:13.802795+00:00 app[web.1]: from /app/vendor/ruby-2.3.0/lib/ruby/2.3.0/psych/visitors/visitor.rb:16:invisit' 2016-09-16T14:06:13.802796+00:00 app[web.1]: from /app/vendor/ruby-2.3.0/lib/ruby/2.3.0/psych/visitors/visitor.rb:6:in accept' 2016-09-16T14:06:13.802796+00:00 app[web.1]: from /app/vendor/ruby-2.3.0/lib/ruby/2.3.0/psych/visitors/to_ruby.rb:32:inaccept' 2016-09-16T14:06:13.802796+00:00 app[web.1]: from /app/vendor/ruby-2.3.0/lib/ruby/2.3.0/psych/visitors/to_ruby.rb:338:in block in revive_hash' 2016-09-16T14:06:13.802797+00:00 app[web.1]: from /app/vendor/ruby-2.3.0/lib/ruby/2.3.0/psych/visitors/to_ruby.rb:336:ineach' 2016-09-16T14:06:13.802797+00:00 app[web.1]: from /app/vendor/ruby-2.3.0/lib/ruby/2.3.0/psych/visitors/to_ruby.rb:336:in each_slice' 2016-09-16T14:06:13.802798+00:00 app[web.1]: from /app/vendor/ruby-2.3.0/lib/ruby/2.3.0/psych/visitors/to_ruby.rb:336:inrevive_hash' 2016-09-16T14:06:13.802798+00:00 app[web.1]: from /app/vendor/ruby-2.3.0/lib/ruby/2.3.0/psych/visitors/to_ruby.rb:162:in visit_Psych_Nodes_Mapping' 2016-09-16T14:06:13.802798+00:00 app[web.1]: from /app/vendor/ruby-2.3.0/lib/ruby/2.3.0/psych/visitors/visitor.rb:16:invisit' 2016-09-16T14:06:13.802799+00:00 app[web.1]: from /app/vendor/ruby-2.3.0/lib/ruby/2.3.0/psych/visitors/visitor.rb:6:in accept' 2016-09-16T14:06:13.802799+00:00 app[web.1]: from /app/vendor/ruby-2.3.0/lib/ruby/2.3.0/psych/visitors/to_ruby.rb:32:inaccept' 2016-09-16T14:06:13.802800+00:00 app[web.1]: from /app/vendor/ruby-2.3.0/lib/ruby/2.3.0/psych/visitors/to_ruby.rb:338:in block in revive_hash' 2016-09-16T14:06:13.802800+00:00 app[web.1]: from /app/vendor/ruby-2.3.0/lib/ruby/2.3.0/psych/visitors/to_ruby.rb:336:ineach' 2016-09-16T14:06:13.802800+00:00 app[web.1]: from /app/vendor/ruby-2.3.0/lib/ruby/2.3.0/psych/visitors/to_ruby.rb:336:in each_slice' 2016-09-16T14:06:13.802801+00:00 app[web.1]: from /app/vendor/ruby-2.3.0/lib/ruby/2.3.0/psych/visitors/to_ruby.rb:336:inrevive_hash' 2016-09-16T14:06:13.802802+00:00 app[web.1]: from /app/vendor/ruby-2.3.0/lib/ruby/2.3.0/psych/visitors/to_ruby.rb:162:in visit_Psych_Nodes_Mapping' 2016-09-16T14:06:13.802802+00:00 app[web.1]: from /app/vendor/ruby-2.3.0/lib/ruby/2.3.0/psych/visitors/visitor.rb:16:invisit' 2016-09-16T14:06:13.802802+00:00 app[web.1]: from /app/vendor/ruby-2.3.0/lib/ruby/2.3.0/psych/visitors/visitor.rb:6:in accept' 2016-09-16T14:06:13.802803+00:00 app[web.1]: from /app/vendor/ruby-2.3.0/lib/ruby/2.3.0/psych/visitors/to_ruby.rb:311:invisit_Psych_Nodes_Document' 2016-09-16T14:06:13.802803+00:00 app[web.1]: from /app/vendor/ruby-2.3.0/lib/ruby/2.3.0/psych/visitors/visitor.rb:16:in visit' 2016-09-16T14:06:13.802804+00:00 app[web.1]: from /app/vendor/ruby-2.3.0/lib/ruby/2.3.0/psych/visitors/visitor.rb:6:inaccept' 2016-09-16T14:06:13.802804+00:00 app[web.1]: from /app/vendor/ruby-2.3.0/lib/ruby/2.3.0/psych/visitors/to_ruby.rb:32:in accept' 2016-09-16T14:06:13.802806+00:00 app[web.1]: from /app/vendor/ruby-2.3.0/lib/ruby/2.3.0/psych.rb:253:inload' 2016-09-16T14:06:13.802813+00:00 app[web.1]: from /app/vendor/bundle/ruby/2.3.0/gems/railties-4.2.5.1/lib/rails/application/configuration.rb:104:in database_configuration' 2016-09-16T14:06:13.802806+00:00 app[web.1]: from /app/vendor/ruby-2.3.0/lib/ruby/2.3.0/psych/nodes/node.rb:38:into_ruby' 2016-09-16T14:06:13.802814+00:00 app[web.1]: from /app/vendor/bundle/ruby/2.3.0/gems/activerecord-4.2.5.1/lib/active_record/railtie.rb:117:in block (2 levels) in <class:Railtie>' 2016-09-16T14:06:13.802803+00:00 app[web.1]: from /app/vendor/ruby-2.3.0/lib/ruby/2.3.0/psych/visitors/to_ruby.rb:32:inaccept' 2016-09-16T14:06:13.802815+00:00 app[web.1]: from /app/vendor/bundle/ruby/2.3.0/gems/activesupport-4.2.5.1/lib/active_support/lazy_load_hooks.rb:38:in instance_eval' 2016-09-16T14:06:13.802815+00:00 app[web.1]: from /app/vendor/bundle/ruby/2.3.0/gems/activesupport-4.2.5.1/lib/active_support/lazy_load_hooks.rb:38:inexecute_hook' 2016-09-16T14:06:13.802816+00:00 app[web.1]: from /app/vendor/bundle/ruby/2.3.0/gems/activesupport-4.2.5.1/lib/active_support/lazy_load_hooks.rb:45:in block in run_load_hooks' 2016-09-16T14:06:13.802816+00:00 app[web.1]: from /app/vendor/bundle/ruby/2.3.0/gems/activesupport-4.2.5.1/lib/active_support/lazy_load_hooks.rb:44:ineach' 2016-09-16T14:06:13.802816+00:00 app[web.1]: from /app/vendor/bundle/ruby/2.3.0/gems/activesupport-4.2.5.1/lib/active_support/lazy_load_hooks.rb:44:in run_load_hooks' 2016-09-16T14:06:13.802817+00:00 app[web.1]: from /app/vendor/bundle/ruby/2.3.0/gems/activerecord-4.2.5.1/lib/active_record/base.rb:315:in' 2016-09-16T14:06:13.802818+00:00 app[web.1]: from /app/vendor/bundle/ruby/2.3.0/gems/activerecord-4.2.5.1/lib/active_record/base.rb:26:in <top (required)>' 2016-09-16T14:06:13.802818+00:00 app[web.1]: from /app/vendor/bundle/ruby/2.3.0/gems/activesupport-4.2.5.1/lib/active_support/dependencies.rb:274:inrequire' 2016-09-16T14:06:13.802820+00:00 app[web.1]: from /app/vendor/bundle/ruby/2.3.0/gems/activesupport-4.2.5.1/lib/active_support/dependencies.rb:274:in block in require' 2016-09-16T14:06:13.802821+00:00 app[web.1]: from /app/vendor/bundle/ruby/2.3.0/gems/activesupport-4.2.5.1/lib/active_support/dependencies.rb:240:inload_dependency' 2016-09-16T14:06:13.802822+00:00 app[web.1]: from /app/vendor/bundle/ruby/2.3.0/gems/activesupport-4.2.5.1/lib/active_support/dependencies.rb:274:in require' 2016-09-16T14:06:13.802844+00:00 app[web.1]: from /app/vendor/bundle/ruby/2.3.0/gems/activerecord-4.2.5.1/lib/active_record/relation/predicate_builder.rb:121:in' 2016-09-16T14:06:13.802845+00:00 app[web.1]: from /app/vendor/bundle/ruby/2.3.0/gems/activerecord-4.2.5.1/lib/active_record/relation/predicate_builder.rb:2:in <module:ActiveRecord>' 2016-09-16T14:06:13.802845+00:00 app[web.1]: from /app/vendor/bundle/ruby/2.3.0/gems/activerecord-4.2.5.1/lib/active_record/relation/predicate_builder.rb:1:in' 2016-09-16T14:06:13.802845+00:00 app[web.1]: from /app/vendor/bundle/ruby/2.3.0/gems/activesupport-4.2.5.1/lib/active_support/dependencies.rb:274:in require' 2016-09-16T14:06:13.802846+00:00 app[web.1]: from /app/vendor/bundle/ruby/2.3.0/gems/activesupport-4.2.5.1/lib/active_support/dependencies.rb:274:inblock in require' 2016-09-16T14:06:13.802846+00:00 app[web.1]: from /app/vendor/bundle/ruby/2.3.0/gems/activesupport-4.2.5.1/lib/active_support/dependencies.rb:240:in load_dependency' 2016-09-16T14:06:13.802848+00:00 app[web.1]: from /app/vendor/bundle/ruby/2.3.0/gems/activesupport-4.2.5.1/lib/active_support/dependencies.rb:274:inrequire' 2016-09-16T14:06:13.802848+00:00 app[web.1]: from /app/vendor/bundle/ruby/2.3.0/gems/activesupport-4.2.5.1/lib/active_support/dependencies/autoload.rb:70:in block in eager_load!' 2016-09-16T14:06:13.802849+00:00 app[web.1]: from /app/vendor/bundle/ruby/2.3.0/gems/activesupport-4.2.5.1/lib/active_support/dependencies/autoload.rb:70:ineach_value' 2016-09-16T14:06:13.802849+00:00 app[web.1]: from /app/vendor/bundle/ruby/2.3.0/gems/activerecord-4.2.5.1/lib/active_record.rb:160:in eager_load!' 2016-09-16T14:06:13.802849+00:00 app[web.1]: from /app/vendor/bundle/ruby/2.3.0/gems/activesupport-4.2.5.1/lib/active_support/dependencies/autoload.rb:70:ineager_load!' 2016-09-16T14:06:13.802851+00:00 app[web.1]: from /app/vendor/bundle/ruby/2.3.0/gems/railties-4.2.5.1/lib/rails/application/finisher.rb:56:in each' 2016-09-16T14:06:13.802851+00:00 app[web.1]: from /app/vendor/bundle/ruby/2.3.0/gems/railties-4.2.5.1/lib/rails/application/finisher.rb:56:inblock in ' 2016-09-16T14:06:13.802853+00:00 app[web.1]: from /app/vendor/bundle/ruby/2.3.0/gems/railties-4.2.5.1/lib/rails/initializable.rb:30:in instance_exec' 2016-09-16T14:06:13.802853+00:00 app[web.1]: from /app/vendor/bundle/ruby/2.3.0/gems/railties-4.2.5.1/lib/rails/initializable.rb:30:inrun' 2016-09-16T14:06:13.802854+00:00 app[web.1]: from /app/vendor/bundle/ruby/2.3.0/gems/railties-4.2.5.1/lib/rails/initializable.rb:55:in block in run_initializers' 2016-09-16T14:06:13.802855+00:00 app[web.1]: from /app/vendor/ruby-2.3.0/lib/ruby/2.3.0/tsort.rb:228:inblock in tsort_each' 2016-09-16T14:06:13.802857+00:00 app[web.1]: from /app/vendor/ruby-2.3.0/lib/ruby/2.3.0/tsort.rb:350:in block (2 levels) in each_strongly_connected_component' 2016-09-16T14:06:13.802869+00:00 app[web.1]: from /app/vendor/ruby-2.3.0/lib/ruby/2.3.0/tsort.rb:431:ineach_strongly_connected_component_from' 2016-09-16T14:06:13.802870+00:00 app[web.1]: from /app/vendor/ruby-2.3.0/lib/ruby/2.3.0/tsort.rb:349:in block in each_strongly_connected_component' 2016-09-16T14:06:13.802870+00:00 app[web.1]: from /app/vendor/ruby-2.3.0/lib/ruby/2.3.0/tsort.rb:347:ineach' 2016-09-16T14:06:13.802870+00:00 app[web.1]: from /app/vendor/ruby-2.3.0/lib/ruby/2.3.0/tsort.rb:347:in call' 2016-09-16T14:06:13.802884+00:00 app[web.1]: from /app/vendor/ruby-2.3.0/lib/ruby/2.3.0/tsort.rb:347:ineach_strongly_connected_component' 2016-09-16T14:06:13.802885+00:00 app[web.1]: from /app/vendor/ruby-2.3.0/lib/ruby/2.3.0/tsort.rb:226:in tsort_each' 2016-09-16T14:06:13.802885+00:00 app[web.1]: from /app/vendor/ruby-2.3.0/lib/ruby/2.3.0/tsort.rb:205:intsort_each' 2016-09-16T14:06:13.802885+00:00 app[web.1]: from /app/vendor/bundle/ruby/2.3.0/gems/railties-4.2.5.1/lib/rails/initializable.rb:54:in run_initializers' 2016-09-16T14:06:13.802887+00:00 app[web.1]: from /app/vendor/bundle/ruby/2.3.0/gems/railties-4.2.5.1/lib/rails/application.rb:352:ininitialize!' 2016-09-16T14:06:13.802888+00:00 app[web.1]: from /app/config/environment.rb:5:in <top (required)>' 2016-09-16T14:06:13.802889+00:00 app[web.1]: from /app/config.ru:3:inrequire' 2016-09-16T14:06:13.802889+00:00 app[web.1]: from /app/config.ru:3:in block in <main>' 2016-09-16T14:06:13.802890+00:00 app[web.1]: from /app/vendor/bundle/ruby/2.3.0/gems/rack-1.6.4/lib/rack/builder.rb:55:ininstance_eval' 2016-09-16T14:06:13.802892+00:00 app[web.1]: from /app/vendor/bundle/ruby/2.3.0/gems/rack-1.6.4/lib/rack/builder.rb:55:in initialize' 2016-09-16T14:06:13.802893+00:00 app[web.1]: from /app/config.ru:innew' 2016-09-16T14:06:13.802894+00:00 app[web.1]: from /app/config.ru:in <main>' 2016-09-16T14:06:13.802895+00:00 app[web.1]: from /app/vendor/bundle/ruby/2.3.0/gems/rack-1.6.4/lib/rack/builder.rb:49:ineval' 2016-09-16T14:06:13.802897+00:00 app[web.1]: from /app/vendor/bundle/ruby/2.3.0/gems/rack-1.6.4/lib/rack/builder.rb:49:in new_from_string' 2016-09-16T14:06:13.802909+00:00 app[web.1]: from /app/vendor/bundle/ruby/2.3.0/gems/rack-1.6.4/lib/rack/builder.rb:40:inparse_file' 2016-09-16T14:06:13.802910+00:00 app[web.1]: from /app/vendor/bundle/ruby/2.3.0/gems/rack-1.6.4/lib/rack/server.rb:299:in build_app_and_options_from_config' 2016-09-16T14:06:13.802910+00:00 app[web.1]: from /app/vendor/bundle/ruby/2.3.0/gems/rack-1.6.4/lib/rack/server.rb:208:inapp' 2016-09-16T14:06:13.802913+00:00 app[web.1]: from /app/vendor/bundle/ruby/2.3.0/gems/railties-4.2.5.1/lib/rails/commands/server.rb:61:in app' 2016-09-16T14:06:13.802915+00:00 app[web.1]: from /app/vendor/bundle/ruby/2.3.0/gems/rack-1.6.4/lib/rack/server.rb:336:inwrapped_app' 2016-09-16T14:06:13.802916+00:00 app[web.1]: from /app/vendor/bundle/ruby/2.3.0/gems/rack-1.6.4/lib/rack/server.rb:272:in start' 2016-09-16T14:06:13.802916+00:00 app[web.1]: from /app/vendor/bundle/ruby/2.3.0/gems/railties-4.2.5.1/lib/rails/commands/server.rb:80:instart' 2016-09-16T14:06:13.802916+00:00 app[web.1]: from /app/vendor/bundle/ruby/2.3.0/gems/railties-4.2.5.1/lib/rails/commands/commands_tasks.rb:80:in block in server' 2016-09-16T14:06:13.802917+00:00 app[web.1]: from /app/vendor/bundle/ruby/2.3.0/gems/railties-4.2.5.1/lib/rails/commands/commands_tasks.rb:75:intap' 2016-09-16T14:06:13.802930+00:00 app[web.1]: from /app/vendor/bundle/ruby/2.3.0/gems/railties-4.2.5.1/lib/rails/commands/commands_tasks.rb:75:in server' 2016-09-16T14:06:13.802931+00:00 app[web.1]: from /app/vendor/bundle/ruby/2.3.0/gems/railties-4.2.5.1/lib/rails/commands/commands_tasks.rb:39:inrun_command!' 2016-09-16T14:06:13.802932+00:00 app[web.1]: from /app/vendor/bundle/ruby/2.3.0/gems/railties-4.2.5.1/lib/rails/commands.rb:17:in <top (required)>' 2016-09-16T14:06:13.802935+00:00 app[web.1]: from bin/rails:9:inrequire' 2016-09-16T14:06:13.802935+00:00 app[web.1]: from bin/rails:9:in `' 2016-09-16T14:06:13.872751+00:00 heroku[web.1]: State changed from starting to crashed 2016-09-16T14:06:13.872732+00:00 heroku[web.1]: Process exited with status 1 2016-09-16T15:29:42.219103+00:00 heroku[router]: at=error code=H10 desc="App crashed" method=GET path="/" host=shrouded-mountain-58433.herokuapp.com request_id=555caccd-f3cb-41c0-9e1e-ff9b44b26cd0 fwd="124.219.169.191" dyno= connect= service= status=503 bytes=

and below is heroku run rails console

/app/vendor/ruby-2.3.0/lib/ruby/2.3.0/psych/visitors/to_ruby.rb:319:in block in visit_Psych_Nodes_Alias': Cannot loadRails.application.database_configuration: (Psych::BadAlias) Unknown alias: default from /app/vendor/ruby-2.3.0/lib/ruby/2.3.0/psych/visitors/to_ruby.rb:319:infetch' from /app/vendor/ruby-2.3.0/lib/ruby/2.3.0/psych/visitors/to_ruby.rb:319:in visit_Psych_Nodes_Alias' from /app/vendor/ruby-2.3.0/lib/ruby/2.3.0/psych/visitors/visitor.rb:16:invisit' from /app/vendor/ruby-2.3.0/lib/ruby/2.3.0/psych/visitors/visitor.rb:6:in accept' from /app/vendor/ruby-2.3.0/lib/ruby/2.3.0/psych/visitors/to_ruby.rb:32:inaccept' from /app/vendor/ruby-2.3.0/lib/ruby/2.3.0/psych/visitors/to_ruby.rb:338:in block in revive_hash' from /app/vendor/ruby-2.3.0/lib/ruby/2.3.0/psych/visitors/to_ruby.rb:336:ineach' from /app/vendor/ruby-2.3.0/lib/ruby/2.3.0/psych/visitors/to_ruby.rb:336:in each_slice' from /app/vendor/ruby-2.3.0/lib/ruby/2.3.0/psych/visitors/to_ruby.rb:336:inrevive_hash' from /app/vendor/ruby-2.3.0/lib/ruby/2.3.0/psych/visitors/to_ruby.rb:162:in visit_Psych_Nodes_Mapping' from /app/vendor/ruby-2.3.0/lib/ruby/2.3.0/psych/visitors/visitor.rb:16:invisit' from /app/vendor/ruby-2.3.0/lib/ruby/2.3.0/psych/visitors/visitor.rb:6:in accept' from /app/vendor/ruby-2.3.0/lib/ruby/2.3.0/psych/visitors/to_ruby.rb:32:inaccept' from /app/vendor/ruby-2.3.0/lib/ruby/2.3.0/psych/visitors/to_ruby.rb:338:in block in revive_hash' from /app/vendor/ruby-2.3.0/lib/ruby/2.3.0/psych/visitors/to_ruby.rb:336:ineach' from /app/vendor/ruby-2.3.0/lib/ruby/2.3.0/psych/visitors/to_ruby.rb:336:in each_slice' from /app/vendor/ruby-2.3.0/lib/ruby/2.3.0/psych/visitors/to_ruby.rb:336:inrevive_hash' from /app/vendor/ruby-2.3.0/lib/ruby/2.3.0/psych/visitors/to_ruby.rb:162:in visit_Psych_Nodes_Mapping' from /app/vendor/ruby-2.3.0/lib/ruby/2.3.0/psych/visitors/visitor.rb:16:invisit' from /app/vendor/ruby-2.3.0/lib/ruby/2.3.0/psych/visitors/visitor.rb:6:in accept' from /app/vendor/ruby-2.3.0/lib/ruby/2.3.0/psych/visitors/to_ruby.rb:32:inaccept' from /app/vendor/ruby-2.3.0/lib/ruby/2.3.0/psych/visitors/to_ruby.rb:311:in visit_Psych_Nodes_Document' from /app/vendor/ruby-2.3.0/lib/ruby/2.3.0/psych/visitors/visitor.rb:16:invisit' from /app/vendor/ruby-2.3.0/lib/ruby/2.3.0/psych/visitors/visitor.rb:6:in accept' from /app/vendor/ruby-2.3.0/lib/ruby/2.3.0/psych/visitors/to_ruby.rb:32:inaccept' from /app/vendor/ruby-2.3.0/lib/ruby/2.3.0/psych/nodes/node.rb:38:in to_ruby' from /app/vendor/ruby-2.3.0/lib/ruby/2.3.0/psych.rb:253:inload' from /app/vendor/bundle/ruby/2.3.0/gems/railties-4.2.5.1/lib/rails/application/configuration.rb:104:in database_configuration' from /app/vendor/bundle/ruby/2.3.0/gems/activerecord-4.2.5.1/lib/active_record/railtie.rb:117:inblock (2 levels) in ' from /app/vendor/bundle/ruby/2.3.0/gems/activesupport-4.2.5.1/lib/active_support/lazy_load_hooks.rb:38:in instance_eval' from /app/vendor/bundle/ruby/2.3.0/gems/activesupport-4.2.5.1/lib/active_support/lazy_load_hooks.rb:38:inexecute_hook' from /app/vendor/bundle/ruby/2.3.0/gems/activesupport-4.2.5.1/lib/active_support/lazy_load_hooks.rb:45:in block in run_load_hooks' from /app/vendor/bundle/ruby/2.3.0/gems/activesupport-4.2.5.1/lib/active_support/lazy_load_hooks.rb:44:ineach' from /app/vendor/bundle/ruby/2.3.0/gems/activesupport-4.2.5.1/lib/active_support/lazy_load_hooks.rb:44:in run_load_hooks' from /app/vendor/bundle/ruby/2.3.0/gems/activerecord-4.2.5.1/lib/active_record/base.rb:315:in' from /app/vendor/bundle/ruby/2.3.0/gems/activerecord-4.2.5.1/lib/active_record/base.rb:26:in <top (required)>' from /app/vendor/bundle/ruby/2.3.0/gems/activesupport-4.2.5.1/lib/active_support/dependencies.rb:274:inrequire' from /app/vendor/bundle/ruby/2.3.0/gems/activesupport-4.2.5.1/lib/active_support/dependencies.rb:274:in block in require' from /app/vendor/bundle/ruby/2.3.0/gems/activesupport-4.2.5.1/lib/active_support/dependencies.rb:240:inload_dependency' from /app/vendor/bundle/ruby/2.3.0/gems/activesupport-4.2.5.1/lib/active_support/dependencies.rb:274:in require' from /app/vendor/bundle/ruby/2.3.0/gems/activerecord-4.2.5.1/lib/active_record/relation/predicate_builder.rb:121:in' from /app/vendor/bundle/ruby/2.3.0/gems/activerecord-4.2.5.1/lib/active_record/relation/predicate_builder.rb:2:in <module:ActiveRecord>' from /app/vendor/bundle/ruby/2.3.0/gems/activerecord-4.2.5.1/lib/active_record/relation/predicate_builder.rb:1:in' from /app/vendor/bundle/ruby/2.3.0/gems/activesupport-4.2.5.1/lib/active_support/dependencies.rb:274:in require' from /app/vendor/bundle/ruby/2.3.0/gems/activesupport-4.2.5.1/lib/active_support/dependencies.rb:274:inblock in require' from /app/vendor/bundle/ruby/2.3.0/gems/activesupport-4.2.5.1/lib/active_support/dependencies.rb:240:in load_dependency' from /app/vendor/bundle/ruby/2.3.0/gems/activesupport-4.2.5.1/lib/active_support/dependencies.rb:274:inrequire' from /app/vendor/bundle/ruby/2.3.0/gems/activesupport-4.2.5.1/lib/active_support/dependencies/autoload.rb:70:in block in eager_load!' from /app/vendor/bundle/ruby/2.3.0/gems/activesupport-4.2.5.1/lib/active_support/dependencies/autoload.rb:70:ineach_value' from /app/vendor/bundle/ruby/2.3.0/gems/activesupport-4.2.5.1/lib/active_support/dependencies/autoload.rb:70:in eager_load!' from /app/vendor/bundle/ruby/2.3.0/gems/activerecord-4.2.5.1/lib/active_record.rb:160:ineager_load!' from /app/vendor/bundle/ruby/2.3.0/gems/railties-4.2.5.1/lib/rails/application/finisher.rb:56:in each' from /app/vendor/bundle/ruby/2.3.0/gems/railties-4.2.5.1/lib/rails/application/finisher.rb:56:inblock in ' from /app/vendor/bundle/ruby/2.3.0/gems/railties-4.2.5.1/lib/rails/initializable.rb:30:in instance_exec' from /app/vendor/bundle/ruby/2.3.0/gems/railties-4.2.5.1/lib/rails/initializable.rb:30:inrun' from /app/vendor/bundle/ruby/2.3.0/gems/railties-4.2.5.1/lib/rails/initializable.rb:55:in block in run_initializers' from /app/vendor/ruby-2.3.0/lib/ruby/2.3.0/tsort.rb:228:inblock in tsort_each' from /app/vendor/ruby-2.3.0/lib/ruby/2.3.0/tsort.rb:350:in block (2 levels) in each_strongly_connected_component' from /app/vendor/ruby-2.3.0/lib/ruby/2.3.0/tsort.rb:431:ineach_strongly_connected_component_from' from /app/vendor/ruby-2.3.0/lib/ruby/2.3.0/tsort.rb:349:in block in each_strongly_connected_component' from /app/vendor/ruby-2.3.0/lib/ruby/2.3.0/tsort.rb:347:ineach' from /app/vendor/ruby-2.3.0/lib/ruby/2.3.0/tsort.rb:347:in call' from /app/vendor/ruby-2.3.0/lib/ruby/2.3.0/tsort.rb:347:ineach_strongly_connected_component' from /app/vendor/ruby-2.3.0/lib/ruby/2.3.0/tsort.rb:226:in tsort_each' from /app/vendor/ruby-2.3.0/lib/ruby/2.3.0/tsort.rb:205:intsort_each' from /app/vendor/bundle/ruby/2.3.0/gems/railties-4.2.5.1/lib/rails/initializable.rb:54:in run_initializers' from /app/vendor/bundle/ruby/2.3.0/gems/railties-4.2.5.1/lib/rails/application.rb:352:ininitialize!' from /app/config/environment.rb:5:in <top (required)>' from /app/vendor/bundle/ruby/2.3.0/gems/railties-4.2.5.1/lib/rails/application.rb:328:inrequire' from /app/vendor/bundle/ruby/2.3.0/gems/railties-4.2.5.1/lib/rails/application.rb:328:in require_environment!' from /app/vendor/bundle/ruby/2.3.0/gems/railties-4.2.5.1/lib/rails/commands/commands_tasks.rb:142:inrequire_application_and_environment!' from /app/vendor/bundle/ruby/2.3.0/gems/railties-4.2.5.1/lib/rails/commands/commands_tasks.rb:67:in console' from /app/vendor/bundle/ruby/2.3.0/gems/railties-4.2.5.1/lib/rails/commands/commands_tasks.rb:39:inrun_command!' from /app/vendor/bundle/ruby/2.3.0/gems/railties-4.2.5.1/lib/rails/commands.rb:17:in <top (required)>' from /app/bin/rails:9:inrequire' from /app/bin/rails:9:in `'

Answer 1

This database.yml should work for you

production:
 adapter: postgresql
 encoding: unicode
 pool: 5

development:
  database: db/development.sqlite3

test:
  database: db/test.sqlite3

But I would advise agains using a different database adapter for development.

Answer 2

production:
 <<: *default
 adapter: postgresql
 encoding: unicode
 pool: 5


development:
  <<: *default
  database: db/development.sqlite3

test:
  <<: *default
  database: db/test.sqlite3

Above is my database.yml. Are there anything wrong?