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Так что я внес изменения в мои изменения в subject.rb файл здесьодин ко многие отношений рубина на рельсах
class CreateSubjects < ActiveRecord::Migration
def up
create_table :subjects do |t|
t.string "name"
t.integer "position"
t.boolean "visible", :default =>false
t.timestamps
end
end
def down
drop_table :subjects
end
end
, а потом я пошел вперед и определенный файл page.rb в
class Page < ActiveRecord::Base
belongs_to :subject
end
Тогда у меня к терминалу
Muhammeds-MacBook-Pro: simple_cms muhammedz786 $ рельсов C среду разработки Загрузки (Rails 4.0.2) IRB (основной): 001: 0> су bject = Subject.find (1) Тема Загрузка (0.3мс) SELECT subjects. * FROM subjects ГДЕ subjects. id = 1 LIMIT 1 => #
Затем я попытался вызвать метод subject.page, и я получил следующую ошибку! Что это значит?
irb(main):002:0> subject.page
**Mysql2::Error: Table 'simple_cms_development.pages' doesn't exist: SHOW FULL FIELDS FROM `pages`**
ActiveRecord::StatementInvalid: Mysql2::Error: Table 'simple_cms_development.pages' doesn't exist: SHOW FULL FIELDS FROM `pages`
from /Users/muhammedz786/.rbenv/versions/2.1.0/lib/ruby/gems/2.1.0/gems/activerecord-4.0.2/lib/active_record/connection_adapters/abstract_mysql_adapter.rb:287:in `query'
from /Users/muhammedz786/.rbenv/versions/2.1.0/lib/ruby/gems/2.1.0/gems/activerecord-4.0.2/lib/active_record/connection_adapters/abstract_mysql_adapter.rb:287:in `block in execute'
from /Users/muhammedz786/.rbenv/versions/2.1.0/lib/ruby/gems/2.1.0/gems/activerecord-4.0.2/lib/active_record/connection_adapters/abstract_adapter.rb:435:in `block in log'
from /Users/muhammedz786/.rbenv/versions/2.1.0/lib/ruby/gems/2.1.0/gems/activesupport-4.0.2/lib/active_support/notifications/instrumenter.rb:20:in `instrument'
from /Users/muhammedz786/.rbenv/versions/2.1.0/lib/ruby/gems/2.1.0/gems/activerecord-4.0.2/lib/active_record/connection_adapters/abstract_adapter.rb:430:in `log'
from /Users/muhammedz786/.rbenv/versions/2.1.0/lib/ruby/gems/2.1.0/gems/activerecord-4.0.2/lib/active_record/connection_adapters/abstract_mysql_adapter.rb:287:in `execute'
from /Users/muhammedz786/.rbenv/versions/2.1.0/lib/ruby/gems/2.1.0/gems/activerecord-4.0.2/lib/active_record/connection_adapters/mysql2_adapter.rb:222:in `execute'
from /Users/muhammedz786/.rbenv/versions/2.1.0/lib/ruby/gems/2.1.0/gems/activerecord-4.0.2/lib/active_record/connection_adapters/abstract_mysql_adapter.rb:301:in `execute_and_free'
from /Users/muhammedz786/.rbenv/versions/2.1.0/lib/ruby/gems/2.1.0/gems/activerecord-4.0.2/lib/active_record/connection_adapters/abstract_mysql_adapter.rb:462:in `columns'
from /Users/muhammedz786/.rbenv/versions/2.1.0/lib/ruby/gems/2.1.0/gems/activerecord-4.0.2/lib/active_record/connection_adapters/schema_cache.rb:114:in `block in prepare_default_proc'
from /Users/muhammedz786/.rbenv/versions/2.1.0/lib/ruby/gems/2.1.0/gems/activerecord-4.0.2/lib/active_record/connection_adapters/schema_cache.rb:56:in `yield'
from /Users/muhammedz786/.rbenv/versions/2.1.0/lib/ruby/gems/2.1.0/gems/activerecord-4.0.2/lib/active_record/connection_adapters/schema_cache.rb:56:in `columns'
from /Users/muhammedz786/.rbenv/versions/2.1.0/lib/ruby/gems/2.1.0/gems/activerecord-4.0.2/lib/active_record/connection_adapters/schema_cache.rb:118:in `block in prepare_default_proc'
from /Users/muhammedz786/.rbenv/versions/2.1.0/lib/ruby/gems/2.1.0/gems/activerecord-4.0.2/lib/active_record/connection_adapters/schema_cache.rb:67:in `yield'
from /Users/muhammedz786/.rbenv/versions/2.1.0/lib/ruby/gems/2.1.0/gems/activerecord-4.0.2/lib/active_record/connection_adapters/schema_cache.rb:67:in `columns_hash'
from /Users/muhammedz786/.rbenv/versions/2.1.0/lib/ruby/gems/2.1.0/gems/activerecord-4.0.2/lib/active_record/associations/association_scope.rb:25:in `column_for'
... 3 levels...
from /Users/muhammedz786/.rbenv/versions/2.1.0/lib/ruby/gems/2.1.0/gems/activerecord-4.0.2/lib/active_record/associations/association_scope.rb:44:in `each_with_index'
from /Users/muhammedz786/.rbenv/versions/2.1.0/lib/ruby/gems/2.1.0/gems/activerecord-4.0.2/lib/active_record/associations/association_scope.rb:44:in `add_constraints'
from /Users/muhammedz786/.rbenv/versions/2.1.0/lib/ruby/gems/2.1.0/gems/activerecord-4.0.2/lib/active_record/associations/association_scope.rb:19:in `scope'
from /Users/muhammedz786/.rbenv/versions/2.1.0/lib/ruby/gems/2.1.0/gems/activerecord-4.0.2/lib/active_record/associations/association.rb:103:in `association_scope'
from /Users/muhammedz786/.rbenv/versions/2.1.0/lib/ruby/gems/2.1.0/gems/activerecord-4.0.2/lib/active_record/associations/association.rb:87:in `scope'
from /Users/muhammedz786/.rbenv/versions/2.1.0/lib/ruby/gems/2.1.0/gems/activerecord-4.0.2/lib/active_record/associations/singular_association.rb:42:in `find_target'
from /Users/muhammedz786/.rbenv/versions/2.1.0/lib/ruby/gems/2.1.0/gems/activerecord-4.0.2/lib/active_record/associations/association.rb:147:in `load_target'
from /Users/muhammedz786/.rbenv/versions/2.1.0/lib/ruby/gems/2.1.0/gems/activerecord-4.0.2/lib/active_record/associations/association.rb:54:in `reload'
from /Users/muhammedz786/.rbenv/versions/2.1.0/lib/ruby/gems/2.1.0/gems/activerecord-4.0.2/lib/active_record/associations/singular_association.rb:9:in `reader'
from /Users/muhammedz786/.rbenv/versions/2.1.0/lib/ruby/gems/2.1.0/gems/activerecord-4.0.2/lib/active_record/associations/builder/association.rb:70:in `page'
from (irb):2
from /Users/muhammedz786/.rbenv/versions/2.1.0/lib/ruby/gems/2.1.0/gems/railties-4.0.2/lib/rails/commands/console.rb:90:in `start'
from /Users/muhammedz786/.rbenv/versions/2.1.0/lib/ruby/gems/2.1.0/gems/railties-4.0.2/lib/rails/commands/console.rb:9:in `start'
from /Users/muhammedz786/.rbenv/versions/2.1.0/lib/ruby/gems/2.1.0/gems/railties-4.0.2/lib/rails/commands.rb:62:in `<top (required)>'
from bin/rails:4:in `require'