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Ruby Build a Todo List Application with Rails 4 Build a Todo List Application with Rails 4 Generate a Scaffold

Posted by Erick Lee
Erick Lee
2,317 Points

Nomethoderror during bin/rake

Hello, I keep getting my rake aborted and I don't understand why. I tried to search what the NoMethodError and private method String called... are, but haven't really found a good answers. Can anybody help me find out how to troubleshoot this issue? Below here is the error message after running the bin/rake db:migrate. Below that is the message after typing in "--trace". I don't know if that helps find a solution, but in case it does, I will include it in this message. Thanks a lot to anyone willing to explain what the Nomethoderror is and how I might be able to solve it!

Macintosh:odot usuario$ bin/rake db:migrate == 20150105012513 CreateTodoLists: migrating ================================== -- create_table(:todo_lists) rake aborted! StandardError: An error has occurred, this and all later migrations canceled:

private method String' called for #<ActiveRecord::ConnectionAdapters::TableDefinition:0x007f8fcf929af8>/Users/usuario/Documents/webex/odot/db/migrate/20150105012513_create_todo_lists.rb:4:inblock in change' /Users/usuario/Documents/webex/odot/db/migrate/20150105012513_create_todo_lists.rb:3:in change' -e:1:in<main>' NoMethodError: private method String' called for #<ActiveRecord::ConnectionAdapters::TableDefinition:0x007f8fcf929af8> /Users/usuario/Documents/webex/odot/db/migrate/20150105012513_create_todo_lists.rb:4:inblock in change' /Users/usuario/Documents/webex/odot/db/migrate/20150105012513_create_todo_lists.rb:3:in change' -e:1:in<main>' Tasks: TOP => db:migrate (See full trace by running task with --trace)

Macintosh:odot usuario$ bin/rake db:migrate --trace

** Invoke db:migrate (first_time) ** Invoke environment (first_time) ** Execute environment ** Invoke db:load_config (first_time) ** Execute db:load_config ** Execute db:migrate == 20150105012513 CreateTodoLists: migrating ================================== -- create_table(:todo_lists) rake aborted! StandardError: An error has occurred, this and all later migrations canceled:

private method String' called for #<ActiveRecord::ConnectionAdapters::TableDefinition:0x007f8fcea35240>/Users/usuario/Documents/webex/odot/db/migrate/20150105012513_create_todo_lists.rb:4:inblock in change' /Users/usuario/.rbenv/versions/2.1.4/lib/ruby/gems/2.1.0/gems/activerecord-4.1.8/lib/active_record/connection_adapters/abstract/schema_statements.rb:198:in create_table' /Users/usuario/.rbenv/versions/2.1.4/lib/ruby/gems/2.1.0/gems/activerecord-4.1.8/lib/active_record/migration.rb:649:inblock in method_missing' /Users/usuario/.rbenv/versions/2.1.4/lib/ruby/gems/2.1.0/gems/activerecord-4.1.8/lib/active_record/migration.rb:621:in block in say_with_time' /Users/usuario/.rbenv/versions/2.1.4/lib/ruby/2.1.0/benchmark.rb:279:inmeasure' /Users/usuario/.rbenv/versions/2.1.4/lib/ruby/gems/2.1.0/gems/activerecord-4.1.8/lib/active_record/migration.rb:621:in say_with_time' /Users/usuario/.rbenv/versions/2.1.4/lib/ruby/gems/2.1.0/gems/activerecord-4.1.8/lib/active_record/migration.rb:641:inmethod_missing' /Users/usuario/Documents/webex/odot/db/migrate/20150105012513_create_todo_lists.rb:3:in change' /Users/usuario/.rbenv/versions/2.1.4/lib/ruby/gems/2.1.0/gems/activerecord-4.1.8/lib/active_record/migration.rb:595:inexec_migration' /Users/usuario/.rbenv/versions/2.1.4/lib/ruby/gems/2.1.0/gems/activerecord-4.1.8/lib/active_record/migration.rb:579:in block (2 levels) in migrate' /Users/usuario/.rbenv/versions/2.1.4/lib/ruby/2.1.0/benchmark.rb:279:inmeasure' /Users/usuario/.rbenv/versions/2.1.4/lib/ruby/gems/2.1.0/gems/activerecord-4.1.8/lib/active_record/migration.rb:578:in block in migrate' /Users/usuario/.rbenv/versions/2.1.4/lib/ruby/gems/2.1.0/gems/activerecord-4.1.8/lib/active_record/connection_adapters/abstract/connection_pool.rb:294:inwith_connection' /Users/usuario/.rbenv/versions/2.1.4/lib/ruby/gems/2.1.0/gems/activerecord-4.1.8/lib/active_record/migration.rb:577:in migrate' /Users/usuario/.rbenv/versions/2.1.4/lib/ruby/gems/2.1.0/gems/activerecord-4.1.8/lib/active_record/migration.rb:752:inmigrate' /Users/usuario/.rbenv/versions/2.1.4/lib/ruby/gems/2.1.0/gems/activerecord-4.1.8/lib/active_record/migration.rb:991:in block in execute_migration_in_transaction' /Users/usuario/.rbenv/versions/2.1.4/lib/ruby/gems/2.1.0/gems/activerecord-4.1.8/lib/active_record/migration.rb:1037:inblock in ddl_transaction' /Users/usuario/.rbenv/versions/2.1.4/lib/ruby/gems/2.1.0/gems/activerecord-4.1.8/lib/active_record/connection_adapters/abstract/database_statements.rb:201:in block in transaction' /Users/usuario/.rbenv/versions/2.1.4/lib/ruby/gems/2.1.0/gems/activerecord-4.1.8/lib/active_record/connection_adapters/abstract/database_statements.rb:209:inwithin_new_transaction' /Users/usuario/.rbenv/versions/2.1.4/lib/ruby/gems/2.1.0/gems/activerecord-4.1.8/lib/active_record/connection_adapters/abstract/database_statements.rb:201:in transaction' /Users/usuario/.rbenv/versions/2.1.4/lib/ruby/gems/2.1.0/gems/activerecord-4.1.8/lib/active_record/transactions.rb:208:intransaction' /Users/usuario/.rbenv/versions/2.1.4/lib/ruby/gems/2.1.0/gems/activerecord-4.1.8/lib/active_record/migration.rb:1037:in ddl_transaction' /Users/usuario/.rbenv/versions/2.1.4/lib/ruby/gems/2.1.0/gems/activerecord-4.1.8/lib/active_record/migration.rb:990:inexecute_migration_in_transaction' /Users/usuario/.rbenv/versions/2.1.4/lib/ruby/gems/2.1.0/gems/activerecord-4.1.8/lib/active_record/migration.rb:952:in block in migrate' /Users/usuario/.rbenv/versions/2.1.4/lib/ruby/gems/2.1.0/gems/activerecord-4.1.8/lib/active_record/migration.rb:948:ineach' /Users/usuario/.rbenv/versions/2.1.4/lib/ruby/gems/2.1.0/gems/activerecord-4.1.8/lib/active_record/migration.rb:948:in migrate' /Users/usuario/.rbenv/versions/2.1.4/lib/ruby/gems/2.1.0/gems/activerecord-4.1.8/lib/active_record/migration.rb:807:inup' /Users/usuario/.rbenv/versions/2.1.4/lib/ruby/gems/2.1.0/gems/activerecord-4.1.8/lib/active_record/migration.rb:785:in migrate' /Users/usuario/.rbenv/versions/2.1.4/lib/ruby/gems/2.1.0/gems/activerecord-4.1.8/lib/active_record/railties/databases.rake:34:inblock (2 levels) in <top (required)>' /Users/usuario/.rbenv/versions/2.1.4/lib/ruby/gems/2.1.0/gems/rake-10.4.2/lib/rake/task.rb:240:in call' /Users/usuario/.rbenv/versions/2.1.4/lib/ruby/gems/2.1.0/gems/rake-10.4.2/lib/rake/task.rb:240:inblock in execute' /Users/usuario/.rbenv/versions/2.1.4/lib/ruby/gems/2.1.0/gems/rake-10.4.2/lib/rake/task.rb:235:in each' /Users/usuario/.rbenv/versions/2.1.4/lib/ruby/gems/2.1.0/gems/rake-10.4.2/lib/rake/task.rb:235:inexecute' /Users/usuario/.rbenv/versions/2.1.4/lib/ruby/gems/2.1.0/gems/rake-10.4.2/lib/rake/task.rb:179:in block in invoke_with_call_chain' /Users/usuario/.rbenv/versions/2.1.4/lib/ruby/2.1.0/monitor.rb:211:inmon_synchronize' /Users/usuario/.rbenv/versions/2.1.4/lib/ruby/gems/2.1.0/gems/rake-10.4.2/lib/rake/task.rb:172:in invoke_with_call_chain' /Users/usuario/.rbenv/versions/2.1.4/lib/ruby/gems/2.1.0/gems/rake-10.4.2/lib/rake/task.rb:165:ininvoke' /Users/usuario/.rbenv/versions/2.1.4/lib/ruby/gems/2.1.0/gems/rake-10.4.2/lib/rake/application.rb:150:in invoke_task' /Users/usuario/.rbenv/versions/2.1.4/lib/ruby/gems/2.1.0/gems/rake-10.4.2/lib/rake/application.rb:106:inblock (2 levels) in top_level' /Users/usuario/.rbenv/versions/2.1.4/lib/ruby/gems/2.1.0/gems/rake-10.4.2/lib/rake/application.rb:106:in each' /Users/usuario/.rbenv/versions/2.1.4/lib/ruby/gems/2.1.0/gems/rake-10.4.2/lib/rake/application.rb:106:inblock in top_level' /Users/usuario/.rbenv/versions/2.1.4/lib/ruby/gems/2.1.0/gems/rake-10.4.2/lib/rake/application.rb:115:in run_with_threads' /Users/usuario/.rbenv/versions/2.1.4/lib/ruby/gems/2.1.0/gems/rake-10.4.2/lib/rake/application.rb:100:intop_level' /Users/usuario/.rbenv/versions/2.1.4/lib/ruby/gems/2.1.0/gems/rake-10.4.2/lib/rake/application.rb:78:in block in run' /Users/usuario/.rbenv/versions/2.1.4/lib/ruby/gems/2.1.0/gems/rake-10.4.2/lib/rake/application.rb:176:instandard_exception_handling' /Users/usuario/.rbenv/versions/2.1.4/lib/ruby/gems/2.1.0/gems/rake-10.4.2/lib/rake/application.rb:75:in run' /Users/usuario/Documents/webex/odot/bin/rake:8:in<top (required)>' /Users/usuario/.rbenv/versions/2.1.4/lib/ruby/gems/2.1.0/gems/activesupport-4.1.8/lib/active_support/dependencies.rb:241:in load' /Users/usuario/.rbenv/versions/2.1.4/lib/ruby/gems/2.1.0/gems/activesupport-4.1.8/lib/active_support/dependencies.rb:241:inblock in load' /Users/usuario/.rbenv/versions/2.1.4/lib/ruby/gems/2.1.0/gems/activesupport-4.1.8/lib/active_support/dependencies.rb:232:in load_dependency' /Users/usuario/.rbenv/versions/2.1.4/lib/ruby/gems/2.1.0/gems/activesupport-4.1.8/lib/active_support/dependencies.rb:241:inload' /Users/usuario/.rbenv/versions/2.1.4/lib/ruby/2.1.0/rubygems/core_ext/kernel_require.rb:55:in require' /Users/usuario/.rbenv/versions/2.1.4/lib/ruby/2.1.0/rubygems/core_ext/kernel_require.rb:55:inrequire' -e:1:in <main>' NoMethodError: private methodString' called for #<ActiveRecord::ConnectionAdapters::TableDefinition:0x007f8fcea35240> /Users/usuario/Documents/webex/odot/db/migrate/20150105012513_create_todo_lists.rb:4:in block in change' /Users/usuario/.rbenv/versions/2.1.4/lib/ruby/gems/2.1.0/gems/activerecord-4.1.8/lib/active_record/connection_adapters/abstract/schema_statements.rb:198:increate_table' /Users/usuario/.rbenv/versions/2.1.4/lib/ruby/gems/2.1.0/gems/activerecord-4.1.8/lib/active_record/migration.rb:649:in block in method_missing' /Users/usuario/.rbenv/versions/2.1.4/lib/ruby/gems/2.1.0/gems/activerecord-4.1.8/lib/active_record/migration.rb:621:inblock in say_with_time' /Users/usuario/.rbenv/versions/2.1.4/lib/ruby/2.1.0/benchmark.rb:279:in measure' /Users/usuario/.rbenv/versions/2.1.4/lib/ruby/gems/2.1.0/gems/activerecord-4.1.8/lib/active_record/migration.rb:621:insay_with_time' /Users/usuario/.rbenv/versions/2.1.4/lib/ruby/gems/2.1.0/gems/activerecord-4.1.8/lib/active_record/migration.rb:641:in method_missing' /Users/usuario/Documents/webex/odot/db/migrate/20150105012513_create_todo_lists.rb:3:inchange' /Users/usuario/.rbenv/versions/2.1.4/lib/ruby/gems/2.1.0/gems/activerecord-4.1.8/lib/active_record/migration.rb:595:in exec_migration' /Users/usuario/.rbenv/versions/2.1.4/lib/ruby/gems/2.1.0/gems/activerecord-4.1.8/lib/active_record/migration.rb:579:inblock (2 levels) in migrate' /Users/usuario/.rbenv/versions/2.1.4/lib/ruby/2.1.0/benchmark.rb:279:in measure' /Users/usuario/.rbenv/versions/2.1.4/lib/ruby/gems/2.1.0/gems/activerecord-4.1.8/lib/active_record/migration.rb:578:inblock in migrate' /Users/usuario/.rbenv/versions/2.1.4/lib/ruby/gems/2.1.0/gems/activerecord-4.1.8/lib/active_record/connection_adapters/abstract/connection_pool.rb:294:in with_connection' /Users/usuario/.rbenv/versions/2.1.4/lib/ruby/gems/2.1.0/gems/activerecord-4.1.8/lib/active_record/migration.rb:577:inmigrate' /Users/usuario/.rbenv/versions/2.1.4/lib/ruby/gems/2.1.0/gems/activerecord-4.1.8/lib/active_record/migration.rb:752:in migrate' /Users/usuario/.rbenv/versions/2.1.4/lib/ruby/gems/2.1.0/gems/activerecord-4.1.8/lib/active_record/migration.rb:991:inblock in execute_migration_in_transaction' /Users/usuario/.rbenv/versions/2.1.4/lib/ruby/gems/2.1.0/gems/activerecord-4.1.8/lib/active_record/migration.rb:1037:in block in ddl_transaction' /Users/usuario/.rbenv/versions/2.1.4/lib/ruby/gems/2.1.0/gems/activerecord-4.1.8/lib/active_record/connection_adapters/abstract/database_statements.rb:201:inblock in transaction' /Users/usuario/.rbenv/versions/2.1.4/lib/ruby/gems/2.1.0/gems/activerecord-4.1.8/lib/active_record/connection_adapters/abstract/database_statements.rb:209:in within_new_transaction' /Users/usuario/.rbenv/versions/2.1.4/lib/ruby/gems/2.1.0/gems/activerecord-4.1.8/lib/active_record/connection_adapters/abstract/database_statements.rb:201:intransaction' /Users/usuario/.rbenv/versions/2.1.4/lib/ruby/gems/2.1.0/gems/activerecord-4.1.8/lib/active_record/transactions.rb:208:in transaction' /Users/usuario/.rbenv/versions/2.1.4/lib/ruby/gems/2.1.0/gems/activerecord-4.1.8/lib/active_record/migration.rb:1037:inddl_transaction' /Users/usuario/.rbenv/versions/2.1.4/lib/ruby/gems/2.1.0/gems/activerecord-4.1.8/lib/active_record/migration.rb:990:in execute_migration_in_transaction' /Users/usuario/.rbenv/versions/2.1.4/lib/ruby/gems/2.1.0/gems/activerecord-4.1.8/lib/active_record/migration.rb:952:inblock in migrate' /Users/usuario/.rbenv/versions/2.1.4/lib/ruby/gems/2.1.0/gems/activerecord-4.1.8/lib/active_record/migration.rb:948:in each' /Users/usuario/.rbenv/versions/2.1.4/lib/ruby/gems/2.1.0/gems/activerecord-4.1.8/lib/active_record/migration.rb:948:inmigrate' /Users/usuario/.rbenv/versions/2.1.4/lib/ruby/gems/2.1.0/gems/activerecord-4.1.8/lib/active_record/migration.rb:807:in up' /Users/usuario/.rbenv/versions/2.1.4/lib/ruby/gems/2.1.0/gems/activerecord-4.1.8/lib/active_record/migration.rb:785:inmigrate' /Users/usuario/.rbenv/versions/2.1.4/lib/ruby/gems/2.1.0/gems/activerecord-4.1.8/lib/active_record/railties/databases.rake:34:in block (2 levels) in <top (required)>' /Users/usuario/.rbenv/versions/2.1.4/lib/ruby/gems/2.1.0/gems/rake-10.4.2/lib/rake/task.rb:240:incall' /Users/usuario/.rbenv/versions/2.1.4/lib/ruby/gems/2.1.0/gems/rake-10.4.2/lib/rake/task.rb:240:in block in execute' /Users/usuario/.rbenv/versions/2.1.4/lib/ruby/gems/2.1.0/gems/rake-10.4.2/lib/rake/task.rb:235:ineach' /Users/usuario/.rbenv/versions/2.1.4/lib/ruby/gems/2.1.0/gems/rake-10.4.2/lib/rake/task.rb:235:in execute' /Users/usuario/.rbenv/versions/2.1.4/lib/ruby/gems/2.1.0/gems/rake-10.4.2/lib/rake/task.rb:179:inblock in invoke_with_call_chain' /Users/usuario/.rbenv/versions/2.1.4/lib/ruby/2.1.0/monitor.rb:211:in mon_synchronize' /Users/usuario/.rbenv/versions/2.1.4/lib/ruby/gems/2.1.0/gems/rake-10.4.2/lib/rake/task.rb:172:ininvoke_with_call_chain' /Users/usuario/.rbenv/versions/2.1.4/lib/ruby/gems/2.1.0/gems/rake-10.4.2/lib/rake/task.rb:165:in invoke' /Users/usuario/.rbenv/versions/2.1.4/lib/ruby/gems/2.1.0/gems/rake-10.4.2/lib/rake/application.rb:150:ininvoke_task' /Users/usuario/.rbenv/versions/2.1.4/lib/ruby/gems/2.1.0/gems/rake-10.4.2/lib/rake/application.rb:106:in block (2 levels) in top_level' /Users/usuario/.rbenv/versions/2.1.4/lib/ruby/gems/2.1.0/gems/rake-10.4.2/lib/rake/application.rb:106:ineach' /Users/usuario/.rbenv/versions/2.1.4/lib/ruby/gems/2.1.0/gems/rake-10.4.2/lib/rake/application.rb:106:in block in top_level' /Users/usuario/.rbenv/versions/2.1.4/lib/ruby/gems/2.1.0/gems/rake-10.4.2/lib/rake/application.rb:115:inrun_with_threads' /Users/usuario/.rbenv/versions/2.1.4/lib/ruby/gems/2.1.0/gems/rake-10.4.2/lib/rake/application.rb:100:in top_level' /Users/usuario/.rbenv/versions/2.1.4/lib/ruby/gems/2.1.0/gems/rake-10.4.2/lib/rake/application.rb:78:inblock in run' /Users/usuario/.rbenv/versions/2.1.4/lib/ruby/gems/2.1.0/gems/rake-10.4.2/lib/rake/application.rb:176:in standard_exception_handling' /Users/usuario/.rbenv/versions/2.1.4/lib/ruby/gems/2.1.0/gems/rake-10.4.2/lib/rake/application.rb:75:inrun' /Users/usuario/Documents/webex/odot/bin/rake:8:in <top (required)>' /Users/usuario/.rbenv/versions/2.1.4/lib/ruby/gems/2.1.0/gems/activesupport-4.1.8/lib/active_support/dependencies.rb:241:inload' /Users/usuario/.rbenv/versions/2.1.4/lib/ruby/gems/2.1.0/gems/activesupport-4.1.8/lib/active_support/dependencies.rb:241:in block in load' /Users/usuario/.rbenv/versions/2.1.4/lib/ruby/gems/2.1.0/gems/activesupport-4.1.8/lib/active_support/dependencies.rb:232:inload_dependency' /Users/usuario/.rbenv/versions/2.1.4/lib/ruby/gems/2.1.0/gems/activesupport-4.1.8/lib/active_support/dependencies.rb:241:in load' /Users/usuario/.rbenv/versions/2.1.4/lib/ruby/2.1.0/rubygems/core_ext/kernel_require.rb:55:inrequire' /Users/usuario/.rbenv/versions/2.1.4/lib/ruby/2.1.0/rubygems/core_ext/kernel_require.rb:55:in require' -e:1:in<main>' Tasks: TOP => db:migrate

2 Answers

Erick Lee
Erick Lee
2,317 Points

I actually just found my the issue after hours of trying to figure it out. Thanks anyways!!

The 's' in t.string :title was capitalized for some reason and shouldn't have been. this was the issue. 

class CreateTodoLists < ActiveRecord::Migration
  def change
    create_table :todo_lists do |t|
      t.String :title
      t.text :description
      t.timestamps
    end
  end
end

Thanks a lot for the help!

Stone Preston
Stone Preston
42,016 Points
Stone Preston
Stone Preston
42,016 Points

post the code that inside your latest migration inside db/migrate