ruby-on-rails - self.table_name 在具有不同 rails 模式的模型中不起作用

Question

下面是创 build 置架构和添加表创建用户和角色的迁移

class CreateSettingSchema < ActiveRecord::Migration[5.0]
    def up
    execute 'CREATE SCHEMA settings'
    create_table "settings.users" do |t|
      t.string :name
      t.string :email
      t.string :phone
      t.string :address
      t.timestamps
    end

    create_table "settings.roles" do |t|
      t.string :name
            t.timestamps
    end
  end

  def down
    drop_table "settings.roles"
    drop_table "settings.users"
    execute 'DROP SCHEMA settings'
  end

end

我的数据库配置

default: &default
  adapter:  postgresql
  host:     localhost
  encoding: unicode
  pool:     5
  username: postgres
  password: postgres
  schema_search_path: settings,public
development:
  <<: *default
  database: enc_attr_development
  username: postgres
  password: postgres

我正在使用 self.table_name 将模型与数据库表相关联

class SettingRole < ApplicationRecord
    self.table_name "settings.roles"
end
class SettingUser < ApplicationRecord
      self.table_name 'settings.users'
end

我检查了这个answer

但是当我尝试访问 SettingRole 时，它显示以下错误

2.3.1 :005 > SettingRole
ArgumentError: wrong number of arguments (given 1, expected 0)
    from /home/uzaif/.rvm/gems/ruby-2.3.1/gems/activerecord-5.0.6/lib/active_record/model_schema.rb:217:in `table_name'
    from /home/uzaif/learn/enc_attr/app/models/setting_role.rb:2:in `<class:SettingRole>'
    from /home/uzaif/learn/enc_attr/app/models/setting_role.rb:1:in `<top (required)>'
    from /home/uzaif/.rvm/gems/ruby-2.3.1/gems/activesupport-5.0.6/lib/active_support/dependencies.rb:477:in `load'
    from /home/uzaif/.rvm/gems/ruby-2.3.1/gems/activesupport-5.0.6/lib/active_support/dependencies.rb:477:in `block in load_file'
    from /home/uzaif/.rvm/gems/ruby-2.3.1/gems/activesupport-5.0.6/lib/active_support/dependencies.rb:662:in `new_constants_in'
    from /home/uzaif/.rvm/gems/ruby-2.3.1/gems/activesupport-5.0.6/lib/active_support/dependencies.rb:476:in `load_file'
    from /home/uzaif/.rvm/gems/ruby-2.3.1/gems/activesupport-5.0.6/lib/active_support/dependencies.rb:375:in `block in require_or_load'
    from /home/uzaif/.rvm/gems/ruby-2.3.1/gems/activesupport-5.0.6/lib/active_support/dependencies.rb:37:in `block in load_interlock'
    from /home/uzaif/.rvm/gems/ruby-2.3.1/gems/activesupport-5.0.6/lib/active_support/dependencies/interlock.rb:12:in `block in loading'
    from /home/uzaif/.rvm/gems/ruby-2.3.1/gems/activesupport-5.0.6/lib/active_support/concurrency/share_lock.rb:150:in `exclusive'
    from /home/uzaif/.rvm/gems/ruby-2.3.1/gems/activesupport-5.0.6/lib/active_support/dependencies/interlock.rb:11:in `loading'
    from /home/uzaif/.rvm/gems/ruby-2.3.1/gems/activesupport-5.0.6/lib/active_support/dependencies.rb:37:in `load_interlock'
    from /home/uzaif/.rvm/gems/ruby-2.3.1/gems/activesupport-5.0.6/lib/active_support/dependencies.rb:358:in `require_or_load'
    from /home/uzaif/.rvm/gems/ruby-2.3.1/gems/activesupport-

Answer 1

如前所述here , 看起来你需要将其设置为:

self.table_name = 'settings.roles'