Rails控制台数据库模式检查

Question

我是rails / ruby​​的新手，我想知道如何仔细检查我的数据库架构是否在rails控制台中正确构建

在rails c

ActiveRecord::Base.connection.tables给了我

的输出

["schema_migrations", "users", "expense_pictures", "income_pictures", "income_texts", "expense_texts"] 

如何在控制台中检查我是否正确构建了以下架构？

从用户到IncomePictures和ExpensePictures是外键。 IncomePictures to ExpensePictures也是其相应文本的外键

以下是我的模特：

class ExpensePicture < ActiveRecord::Base

  belongs_to :user
  mount_uploader :image, ImageUploader
  has_one :expense_text
end

class ExpenseText < ActiveRecord::Base
  belongs_to :expense_pictures
end

class IncomePicture < ActiveRecord::Base
  belongs_to :user
  mount_uploader :image, ImageUploader
  has_one :income_text
end

class IncomeText < ActiveRecord::Base
  belongs_to :income_pictures
end

class User < ActiveRecord::Base
  # Include default devise modules. Others available are:
  # :confirmable, :lockable, :timeoutable and :omniauthable
  devise :database_authenticatable, :registerable,
         :rememberable, :validatable

  has_many :expense_pictures 
  has_many :income_pictures

end

Answer 1

您可以在db/schema.rb文件中查看此内容。如果您不确定，可以先运行bundle exec rake db:schema:dump - 此rake任务会从数据库重新创建schema.rb文件。

根据您编辑的问题，您应该生成以下迁移：

bundle exec rails g migration add_user_id_to_expense_pictures user:references
bundle exec rails g migration add_expense_picture_id_to_expense_texts expense_picture:references
bundle exec rails g migration add_user_id_to_income_pictures user:references
bundle exec rails g migration add_income_picture_id_to_income_texts income_picture:references

并使用bundle exec rake db:migrate运行它们。

另外，您的某些关联设置不正确。它应该是：

class ExpenseText < ActiveRecord::Base
  belongs_to :expense_picture
end

和

class IncomeText < ActiveRecord::Base
  belongs_to :income_picture
end

Answer 2

我认为你可以通过this link

中列出的一些工具来可视化Rails schema.rb

Answer 3

ActiveRecord::Base.connection.schema_search_path命令将帮助您了解当前架构