ActiveRecord :: AdapterNotSpecified - Datenbank ist nicht konfiguriert

Question

Ich habe angefangen, diesen Fehler zu bekommen, wenn ich meine Ruby on Rails App auf Bluemix drehe. Meine App braucht nicht tatsächlich eine Datenbank, aber ich habe folgendes in

database.yml: 
default: &default 
    adapter: sqlite3 
    pool: 5 
    timeout: 5000 

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

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

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

Und in meinem Gemfile:

gem 'sqlite3' # Use sqlite3 as the database for Active Record 

group :production do 
    gem 'rails_serve_static_assets' 
end 

Dies sind die Fehler, die ich erhalten:

 Could not detect rake tasks 
     ensure you can run `$ bundle exec rake -P` against your app with no environment variables present 
     and using the production group of your Gemfile. 
     /tmp/staged/app/vendor/bundle/ruby/2.2.0/gems/activesupport-4.1.1/lib/active_support/values/time_zone.rb:285: warning: circular argument reference - now 
     DEPRECATION WARNING: Passing a string to ActiveRecord::Base.establish_connection for a configuration lookup is deprecated, please pass a symbol (:"") instead. (called from <top (required)> at /tmp/staged/app/Rakefile:6) 
     rake aborted! 
     ActiveRecord::AdapterNotSpecified: '' database is not configured. Available: ["production"] 
     /tmp/staged/app/vendor/bundle/ruby/2.2.0/gems/activerecord-4.1.1/lib/active_record/connection_adapters/connection_specification.rb:257:in `resolve_symbol_connection' 
     /tmp/staged/app/vendor/bundle/ruby/2.2.0/gems/activerecord-4.1.1/lib/active_record/connection_adapters/connection_specification.rb:240:in `resolve_string_connection' 
     /tmp/staged/app/vendor/bundle/ruby/2.2.0/gems/activerecord-4.1.1/lib/active_record/connection_adapters/connection_specification.rb:267:in `resolve_hash_connection' 
     /tmp/staged/app/vendor/bundle/ruby/2.2.0/gems/activerecord-4.1.1/lib/active_record/connection_adapters/connection_specification.rb:228:in `resolve_connection' 
     /tmp/staged/app/vendor/bundle/ruby/2.2.0/gems/activerecord-4.1.1/lib/active_record/connection_adapters/connection_specification.rb:152:in `resolve' 
     /tmp/staged/app/vendor/bundle/ruby/2.2.0/gems/activerecord-4.1.1/lib/active_record/connection_adapters/connection_specification.rb:164:in `block in resolve_all' 
     /tmp/staged/app/vendor/bundle/ruby/2.2.0/gems/activerecord-4.1.1/lib/active_record/connection_adapters/connection_specification.rb:163:in `each' 
     /tmp/staged/app/vendor/bundle/ruby/2.2.0/gems/activerecord-4.1.1/lib/active_record/connection_adapters/connection_specification.rb:163:in `resolve_all' 
     /tmp/staged/app/vendor/bundle/ruby/2.2.0/gems/activerecord-4.1.1/lib/active_record/connection_handling.rb:69:in `resolve' 
     /tmp/staged/app/vendor/bundle/ruby/2.2.0/gems/activerecord-4.1.1/lib/active_record/core.rb:46:in `configurations=' 
     /tmp/staged/app/vendor/bundle/ruby/2.2.0/gems/activerecord-4.1.1/lib/active_record/core.rb:48:in `block in <module:Core>' 
     /tmp/staged/app/vendor/bundle/ruby/2.2.0/gems/activesupport-4.1.1/lib/active_support/concern.rb:120:in `class_eval' 
     /tmp/staged/app/vendor/bundle/ruby/2.2.0/gems/activesupport-4.1.1/lib/active_support/concern.rb:120:in `append_features' 
     /tmp/staged/app/vendor/bundle/ruby/2.2.0/gems/activerecord-4.1.1/lib/active_record/base.rb:297:in `include' 
     /tmp/staged/app/vendor/bundle/ruby/2.2.0/gems/activerecord-4.1.1/lib/active_record/base.rb:297:in `<class:Base>' 
     /tmp/staged/app/vendor/bundle/ruby/2.2.0/gems/activerecord-4.1.1/lib/active_record/base.rb:282:in `<module:ActiveRecord>' 
     /tmp/staged/app/vendor/bundle/ruby/2.2.0/gems/activerecord-4.1.1/lib/active_record/base.rb:23:in `<top (required)>' 
     /tmp/staged/app/vendor/bundle/ruby/2.2.0/gems/activerecord-4.1.1/lib/active_record/railtie.rb:39:in `require' 
     /tmp/staged/app/vendor/bundle/ruby/2.2.0/gems/activerecord-4.1.1/lib/active_record/railtie.rb:39:in `block in <class:Railtie>' 
     /tmp/staged/app/vendor/bundle/ruby/2.2.0/gems/railties-4.1.1/lib/rails/railtie.rb:237:in `instance_exec' 
     /tmp/staged/app/vendor/bundle/ruby/2.2.0/gems/railties-4.1.1/lib/rails/railtie.rb:237:in `block in run_tasks_blocks' 
     /tmp/staged/app/vendor/bundle/ruby/2.2.0/gems/railties-4.1.1/lib/rails/railtie.rb:245:in `each' 
     /tmp/staged/app/vendor/bundle/ruby/2.2.0/gems/railties-4.1.1/lib/rails/railtie.rb:245:in `each_registered_block' 
     /tmp/staged/app/vendor/bundle/ruby/2.2.0/gems/railties-4.1.1/lib/rails/railtie.rb:237:in `run_tasks_blocks' 
     /tmp/staged/app/vendor/bundle/ruby/2.2.0/gems/railties-4.1.1/lib/rails/application.rb:361:in `block in run_tasks_blocks' 
     /tmp/staged/app/vendor/bundle/ruby/2.2.0/gems/railties-4.1.1/lib/rails/engine/railties.rb:13:in `each' 
     /tmp/staged/app/vendor/bundle/ruby/2.2.0/gems/railties-4.1.1/lib/rails/engine/railties.rb:13:in `each' 
     /tmp/staged/app/vendor/bundle/ruby/2.2.0/gems/railties-4.1.1/lib/rails/application.rb:361:in `run_tasks_blocks' 
     /tmp/staged/app/vendor/bundle/ruby/2.2.0/gems/railties-4.1.1/lib/rails/engine.rb:449:in `load_tasks' 
     /tmp/staged/app/Rakefile:6:in `<top (required)>' 
     /tmp/staged/app/vendor/bundle/ruby/2.2.0/gems/rake-11.1.2/lib/rake/rake_module.rb:28:in `load' 
     /tmp/staged/app/vendor/bundle/ruby/2.2.0/gems/rake-11.1.2/lib/rake/rake_module.rb:28:in `load_rakefile' 
     /tmp/staged/app/vendor/bundle/ruby/2.2.0/gems/rake-11.1.2/lib/rake/application.rb:689:in `raw_load_rakefile' 
     /tmp/staged/app/vendor/bundle/ruby/2.2.0/gems/rake-11.1.2/lib/rake/application.rb:94:in `block in load_rakefile' 
     /tmp/staged/app/vendor/bundle/ruby/2.2.0/gems/rake-11.1.2/lib/rake/application.rb:176:in `standard_exception_handling' 
     /tmp/staged/app/vendor/bundle/ruby/2.2.0/gems/rake-11.1.2/lib/rake/application.rb:93:in `load_rakefile' 
     /tmp/staged/app/vendor/bundle/ruby/2.2.0/gems/rake-11.1.2/lib/rake/application.rb:77:in `block in run' 
     /tmp/staged/app/vendor/bundle/ruby/2.2.0/gems/rake-11.1.2/lib/rake/application.rb:176:in `standard_exception_handling' 
     /tmp/staged/app/vendor/bundle/ruby/2.2.0/gems/rake-11.1.2/lib/rake/application.rb:75:in `run' 
     /tmp/staged/app/vendor/bundle/ruby/2.2.0/gems/rake-11.1.2/bin/rake:33:in `<top (required)>' 
     vendor/bundle/bin/rake:16:in `load' 
     vendor/bundle/bin/rake:16:in `<main>' 
###### WARNING: 
     You have not declared a Ruby version in your Gemfile. 
     To set your Ruby version add this line to your Gemfile: 
     ruby '2.2.3' 

Answer 1

Sieht aus wie die Variable RAILS_ENV ist nicht gesetzt. Ich habe Bluemix nicht verwendet, also bin ich mir nicht sicher, wie man dort Variablen exportiert. Wenn Sie keine Datenbank benötigen, müssen Sie keinen ActiveRecord hinzufügen. Weitere Informationen zum Entfernen des ActiveRecords finden Sie unter thread.