I am reading the agile web development with rails book, and starting to
create the depot. I am getting the below error after setting up the
“ruby script/generate scaffold Product Admin” does anyone know what the
problem is?
NameError in AdminController#index
uninitialized constant Mysql
RAILS_ROOT: ./script/…/config/…/
Application Trace | Framework Trace | Full Trace
/usr/local/lib/ruby/gems/1.8/gems/activesupport-1.3.1/lib/active_support/dependencies.rb:123:in
const_missing' /usr/local/lib/ruby/gems/1.8/gems/activesupport-1.3.1/lib/active_support/dependencies.rb:133:inconst_missing’
/usr/local/lib/ruby/gems/1.8/gems/activerecord-1.14.4/lib/active_record/connection_adapters/mysql_adapter.rb:34:in
mysql_connection' /usr/local/lib/ruby/gems/1.8/gems/activerecord-1.14.4/lib/active_record/connection_adapters/abstract/connection_specification.rb:251:inconnection_without_query_cache=’
/usr/local/lib/ruby/gems/1.8/gems/activerecord-1.14.4/lib/active_record/query_cache.rb:54:in
connection=' /usr/local/lib/ruby/gems/1.8/gems/activerecord-1.14.4/lib/active_record/connection_adapters/abstract/connection_specification.rb:220:inretrieve_connection’
/usr/local/lib/ruby/gems/1.8/gems/activerecord-1.14.4/lib/active_record/connection_adapters/abstract/connection_specification.rb:78:in
connection' /usr/local/lib/ruby/gems/1.8/gems/activerecord-1.14.4/lib/active_record/base.rb:696:incolumns’
/usr/local/lib/ruby/gems/1.8/gems/activerecord-1.14.4/lib/active_record/calculations.rb:216:in
column_for' /usr/local/lib/ruby/gems/1.8/gems/activerecord-1.14.4/lib/active_record/calculations.rb:138:incalculate’
/usr/local/lib/ruby/gems/1.8/gems/activerecord-1.14.4/lib/active_record/calculations.rb:66:in
count' /usr/local/lib/ruby/gems/1.8/gems/actionpack-1.12.5/lib/action_controller/pagination.rb:172:incount_collection_for_pagination’
/usr/local/lib/ruby/gems/1.8/gems/actionpack-1.12.5/lib/action_controller/pagination.rb:196:in
paginator_and_collection_for' /usr/local/lib/ruby/gems/1.8/gems/actionpack-1.12.5/lib/action_controller/pagination.rb:129:inpaginate’
#{RAILS_ROOT}/app/controllers/admin_controller.rb:13:in list' #{RAILS_ROOT}/app/controllers/admin_controller.rb:8:inindex’
/usr/local/lib/ruby/gems/1.8/gems/activesupport-1.3.1/lib/active_support/dependencies.rb:123:in
const_missing' /usr/local/lib/ruby/gems/1.8/gems/activesupport-1.3.1/lib/active_support/dependencies.rb:133:inconst_missing’
/usr/local/lib/ruby/gems/1.8/gems/activerecord-1.14.4/lib/active_record/connection_adapters/mysql_adapter.rb:34:in
mysql_connection' /usr/local/lib/ruby/gems/1.8/gems/activerecord-1.14.4/lib/active_record/connection_adapters/abstract/connection_specification.rb:251:inconnection_without_query_cache=’
/usr/local/lib/ruby/gems/1.8/gems/activerecord-1.14.4/lib/active_record/query_cache.rb:54:in
connection=' /usr/local/lib/ruby/gems/1.8/gems/activerecord-1.14.4/lib/active_record/connection_adapters/abstract/connection_specification.rb:220:inretrieve_connection’
/usr/local/lib/ruby/gems/1.8/gems/activerecord-1.14.4/lib/active_record/connection_adapters/abstract/connection_specification.rb:78:in
connection' /usr/local/lib/ruby/gems/1.8/gems/activerecord-1.14.4/lib/active_record/base.rb:696:incolumns’
/usr/local/lib/ruby/gems/1.8/gems/activerecord-1.14.4/lib/active_record/calculations.rb:216:in
column_for' /usr/local/lib/ruby/gems/1.8/gems/activerecord-1.14.4/lib/active_record/calculations.rb:138:incalculate’
/usr/local/lib/ruby/gems/1.8/gems/activerecord-1.14.4/lib/active_record/calculations.rb:66:in
count' /usr/local/lib/ruby/gems/1.8/gems/actionpack-1.12.5/lib/action_controller/pagination.rb:172:incount_collection_for_pagination’
/usr/local/lib/ruby/gems/1.8/gems/actionpack-1.12.5/lib/action_controller/pagination.rb:196:in
paginator_and_collection_for' /usr/local/lib/ruby/gems/1.8/gems/actionpack-1.12.5/lib/action_controller/pagination.rb:129:inpaginate’
/usr/local/lib/ruby/gems/1.8/gems/actionpack-1.12.5/lib/action_controller/base.rb:941:in
perform_action_without_filters' /usr/local/lib/ruby/gems/1.8/gems/actionpack-1.12.5/lib/action_controller/filters.rb:368:inperform_action_without_benchmark’
/usr/local/lib/ruby/gems/1.8/gems/actionpack-1.12.5/lib/action_controller/benchmarking.rb:69:in
perform_action_without_rescue' /usr/local/lib/ruby/1.8/benchmark.rb:293:inmeasure’
/usr/local/lib/ruby/gems/1.8/gems/actionpack-1.12.5/lib/action_controller/benchmarking.rb:69:in
perform_action_without_rescue' /usr/local/lib/ruby/gems/1.8/gems/actionpack-1.12.5/lib/action_controller/rescue.rb:82:inperform_action’
/usr/local/lib/ruby/gems/1.8/gems/actionpack-1.12.5/lib/action_controller/base.rb:408:in
process_without_filters' /usr/local/lib/ruby/gems/1.8/gems/actionpack-1.12.5/lib/action_controller/filters.rb:377:inprocess_without_session_management_support’
/usr/local/lib/ruby/gems/1.8/gems/actionpack-1.12.5/lib/action_controller/session_management.rb:117:in
process' /usr/local/lib/ruby/gems/1.8/gems/rails-1.1.6/lib/dispatcher.rb:38:indispatch’
/usr/local/lib/ruby/gems/1.8/gems/rails-1.1.6/lib/webrick_server.rb:115:in
handle_dispatch' /usr/local/lib/ruby/gems/1.8/gems/rails-1.1.6/lib/webrick_server.rb:81:inservice’
/usr/local/lib/ruby/1.8/webrick/httpserver.rb:104:in service' /usr/local/lib/ruby/1.8/webrick/httpserver.rb:65:inrun’
/usr/local/lib/ruby/1.8/webrick/server.rb:173:in start_thread' /usr/local/lib/ruby/1.8/webrick/server.rb:162:instart_thread’
/usr/local/lib/ruby/1.8/webrick/server.rb:95:in start' /usr/local/lib/ruby/1.8/webrick/server.rb:92:instart’
/usr/local/lib/ruby/1.8/webrick/server.rb:23:in start' /usr/local/lib/ruby/1.8/webrick/server.rb:82:instart’
/usr/local/lib/ruby/gems/1.8/gems/rails-1.1.6/lib/webrick_server.rb:67:in
`dispatch’
script/server:51
/usr/local/lib/ruby/gems/1.8/gems/activesupport-1.3.1/lib/active_support/dependencies.rb:123:in
const_missing' /usr/local/lib/ruby/gems/1.8/gems/activesupport-1.3.1/lib/active_support/dependencies.rb:133:inconst_missing’
/usr/local/lib/ruby/gems/1.8/gems/activerecord-1.14.4/lib/active_record/connection_adapters/mysql_adapter.rb:34:in
mysql_connection' /usr/local/lib/ruby/gems/1.8/gems/activerecord-1.14.4/lib/active_record/connection_adapters/abstract/connection_specification.rb:251:inconnection_without_query_cache=’
/usr/local/lib/ruby/gems/1.8/gems/activerecord-1.14.4/lib/active_record/query_cache.rb:54:in
connection=' /usr/local/lib/ruby/gems/1.8/gems/activerecord-1.14.4/lib/active_record/connection_adapters/abstract/connection_specification.rb:220:inretrieve_connection’
/usr/local/lib/ruby/gems/1.8/gems/activerecord-1.14.4/lib/active_record/connection_adapters/abstract/connection_specification.rb:78:in
connection' /usr/local/lib/ruby/gems/1.8/gems/activerecord-1.14.4/lib/active_record/base.rb:696:incolumns’
/usr/local/lib/ruby/gems/1.8/gems/activerecord-1.14.4/lib/active_record/calculations.rb:216:in
column_for' /usr/local/lib/ruby/gems/1.8/gems/activerecord-1.14.4/lib/active_record/calculations.rb:138:incalculate’
/usr/local/lib/ruby/gems/1.8/gems/activerecord-1.14.4/lib/active_record/calculations.rb:66:in
count' /usr/local/lib/ruby/gems/1.8/gems/actionpack-1.12.5/lib/action_controller/pagination.rb:172:incount_collection_for_pagination’
/usr/local/lib/ruby/gems/1.8/gems/actionpack-1.12.5/lib/action_controller/pagination.rb:196:in
paginator_and_collection_for' /usr/local/lib/ruby/gems/1.8/gems/actionpack-1.12.5/lib/action_controller/pagination.rb:129:inpaginate’
#{RAILS_ROOT}/app/controllers/admin_controller.rb:13:in list' #{RAILS_ROOT}/app/controllers/admin_controller.rb:8:inindex’
/usr/local/lib/ruby/gems/1.8/gems/actionpack-1.12.5/lib/action_controller/base.rb:941:in
perform_action_without_filters' /usr/local/lib/ruby/gems/1.8/gems/actionpack-1.12.5/lib/action_controller/filters.rb:368:inperform_action_without_benchmark’
/usr/local/lib/ruby/gems/1.8/gems/actionpack-1.12.5/lib/action_controller/benchmarking.rb:69:in
perform_action_without_rescue' /usr/local/lib/ruby/1.8/benchmark.rb:293:inmeasure’
/usr/local/lib/ruby/gems/1.8/gems/actionpack-1.12.5/lib/action_controller/benchmarking.rb:69:in
perform_action_without_rescue' /usr/local/lib/ruby/gems/1.8/gems/actionpack-1.12.5/lib/action_controller/rescue.rb:82:inperform_action’
/usr/local/lib/ruby/gems/1.8/gems/actionpack-1.12.5/lib/action_controller/base.rb:408:in
process_without_filters' /usr/local/lib/ruby/gems/1.8/gems/actionpack-1.12.5/lib/action_controller/filters.rb:377:inprocess_without_session_management_support’
/usr/local/lib/ruby/gems/1.8/gems/actionpack-1.12.5/lib/action_controller/session_management.rb:117:in
process' /usr/local/lib/ruby/gems/1.8/gems/rails-1.1.6/lib/dispatcher.rb:38:indispatch’
/usr/local/lib/ruby/gems/1.8/gems/rails-1.1.6/lib/webrick_server.rb:115:in
handle_dispatch' /usr/local/lib/ruby/gems/1.8/gems/rails-1.1.6/lib/webrick_server.rb:81:inservice’
/usr/local/lib/ruby/1.8/webrick/httpserver.rb:104:in service' /usr/local/lib/ruby/1.8/webrick/httpserver.rb:65:inrun’
/usr/local/lib/ruby/1.8/webrick/server.rb:173:in start_thread' /usr/local/lib/ruby/1.8/webrick/server.rb:162:instart_thread’
/usr/local/lib/ruby/1.8/webrick/server.rb:95:in start' /usr/local/lib/ruby/1.8/webrick/server.rb:92:instart’
/usr/local/lib/ruby/1.8/webrick/server.rb:23:in start' /usr/local/lib/ruby/1.8/webrick/server.rb:82:instart’
/usr/local/lib/ruby/gems/1.8/gems/rails-1.1.6/lib/webrick_server.rb:67:in
`dispatch’
script/server:51
This error occured while loading the following files:
active_record/mysql.rb
Request
Parameters: None
Show session dump
flash: !map:ActionController::Flash::FlashHash {}
Response
Headers: {“cookie”=>[], “Cache-Control”=>“no-cache”}