Ruby on rails 通过具有多个ID的关联工作'；s（轨道4.2.3）_Ruby On Rails_Ruby_Ruby On Rails 4

Ruby on rails 通过具有多个ID的关联工作'；s（轨道4.2.3）

ruby-on-rails ruby ruby-on-rails-4

Ruby on rails 通过具有多个ID的关联工作'；s（轨道4.2.3）,ruby-on-rails,ruby,ruby-on-rails-4,Ruby On Rails,Ruby,Ruby On Rails 4,我正在完成我的第一个Rails项目。我正在创建一个应用程序，其中用户登录并创建一个板，该板特定于用户的ID。在该板中，用户可以创建列表。每个列表应与该板的ID绑定。我遇到的问题是创建一个列表。它不能保存。我看到的具体错误是找不到关联：模型列表中的成员身份我可以看到列表映射到板的ID时出现问题。当我查看Rails服务器的输出时，我看到显示板（应该显示该板的所有列表）没有用户ID或板ID 为用户显示电路板 Started GET "/boards" for ::1 at 2016-10-12 14:

我正在完成我的第一个Rails项目。我正在创建一个应用程序，其中用户登录并创建一个板，该板特定于用户的ID。在该板中，用户可以创建列表。每个列表应与该板的ID绑定。我遇到的问题是创建一个列表。它不能保存。我看到的具体错误是

找不到关联：模型列表中的成员身份

我可以看到列表映射到板的ID时出现问题。当我查看Rails服务器的输出时，我看到显示板（应该显示该板的所有列表）没有用户ID或板ID

为用户显示电路板

Started GET "/boards" for ::1 at 2016-10-12 14:26:33 -0400
Processing by BoardsController#index as HTML
  User Load (0.1ms)  SELECT  "users".* FROM "users" WHERE "users"."id" = ? LIMIT 1  [["id", 1]]
  Board Load (0.1ms)  SELECT "boards".* FROM "boards" WHERE "boards"."user_id" = ?  [["user_id", 1]]
  CACHE (0.0ms)  SELECT  "users".* FROM "users" WHERE "users"."id" = ? LIMIT 1  [["id", 1]]
  CACHE (0.0ms)  SELECT  "users".* FROM "users" WHERE "users"."id" = ? LIMIT 1  [["id", 1]]
  CACHE (0.0ms)  SELECT  "users".* FROM "users" WHERE "users"."id" = ? LIMIT 1  [["id", 1]]
  Rendered boards/index.html.erb within layouts/application (3.4ms)
  Rendered layouts/_flash.html.erb (0.1ms)
Completed 200 OK in 168ms (Views: 166.1ms | ActiveRecord: 0.2ms)

Started GET "/lists.3" for ::1 at 2016-10-12 14:28:26 -0400
Processing by ListsController#index as
  User Load (0.1ms)  SELECT  "users".* FROM "users" WHERE "users"."id" = ? LIMIT 1  [["id", 1]]
  List Load (0.3ms)  SELECT "lists".* FROM "lists"
  Rendered lists/index.html.erb within layouts/application (2.3ms)
  Rendered layouts/_flash.html.erb (0.1ms)
Completed 200 OK in 181ms (Views: 169.2ms | ActiveRecord: 0.9ms)

VS显示该用户的列表

Started GET "/boards" for ::1 at 2016-10-12 14:26:33 -0400
Processing by BoardsController#index as HTML
  User Load (0.1ms)  SELECT  "users".* FROM "users" WHERE "users"."id" = ? LIMIT 1  [["id", 1]]
  Board Load (0.1ms)  SELECT "boards".* FROM "boards" WHERE "boards"."user_id" = ?  [["user_id", 1]]
  CACHE (0.0ms)  SELECT  "users".* FROM "users" WHERE "users"."id" = ? LIMIT 1  [["id", 1]]
  CACHE (0.0ms)  SELECT  "users".* FROM "users" WHERE "users"."id" = ? LIMIT 1  [["id", 1]]
  CACHE (0.0ms)  SELECT  "users".* FROM "users" WHERE "users"."id" = ? LIMIT 1  [["id", 1]]
  Rendered boards/index.html.erb within layouts/application (3.4ms)
  Rendered layouts/_flash.html.erb (0.1ms)
Completed 200 OK in 168ms (Views: 166.1ms | ActiveRecord: 0.2ms)

Started GET "/lists.3" for ::1 at 2016-10-12 14:28:26 -0400
Processing by ListsController#index as
  User Load (0.1ms)  SELECT  "users".* FROM "users" WHERE "users"."id" = ? LIMIT 1  [["id", 1]]
  List Load (0.3ms)  SELECT "lists".* FROM "lists"
  Rendered lists/index.html.erb within layouts/application (2.3ms)
  Rendered layouts/_flash.html.erb (0.1ms)
Completed 200 OK in 181ms (Views: 169.2ms | ActiveRecord: 0.9ms)

相关代码

型号

board.rb

    class Board < ActiveRecord::Base
  belongs_to :owner, class_name: "User", foreign_key: "user_id"

  has_many :lists
  has_many :memberships
  has_many :members, :through => :memberships, :source => :user
  has_many :lists, :through => :memberships, :source => :board

  validates_presence_of :title
  validates_presence_of :owner

  def is_private?
    return self.is_private
  end
end

class List < ActiveRecord::Base
  belongs_to :board
  has_many :cards

  has_one :board, :through => :memberships, :source => :board

  validates_presence_of :title
  validates_presence_of :board
end

class User < ActiveRecord::Base
  has_many :boards
  has_many :lists
  has_many :cards
  has_many :memberships
  has_many :board_memberships, :through => :memberships, :source => :board
  has_many :list_memberships, :through => :memberships, :source => :board

  has_secure_password

  validates :password,
    length: { :minimum => 8 },
    presence: true

  validates :username,
    uniqueness: true,
    presence: true

  validates_confirmation_of :password
end

class Membership < ActiveRecord::Base
  belongs_to :user
  belongs_to :board

  validates :user, presence: true, uniqueness: { scope: :board, message: "User is already a member of that board" }
  validates :board, presence: true
end

classboard：成员身份，：来源=>：用户
拥有多个：列表，：至=>：会员资格，：来源=>：董事会
验证是否存在：title
验证：所有者的存在
def是私人的吗？
返回self.u是私有的
结束
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list.rb

    class Board < ActiveRecord::Base
  belongs_to :owner, class_name: "User", foreign_key: "user_id"

  has_many :lists
  has_many :memberships
  has_many :members, :through => :memberships, :source => :user
  has_many :lists, :through => :memberships, :source => :board

  validates_presence_of :title
  validates_presence_of :owner

  def is_private?
    return self.is_private
  end
end

class List < ActiveRecord::Base
  belongs_to :board
  has_many :cards

  has_one :board, :through => :memberships, :source => :board

  validates_presence_of :title
  validates_presence_of :board
end

class User < ActiveRecord::Base
  has_many :boards
  has_many :lists
  has_many :cards
  has_many :memberships
  has_many :board_memberships, :through => :memberships, :source => :board
  has_many :list_memberships, :through => :memberships, :source => :board

  has_secure_password

  validates :password,
    length: { :minimum => 8 },
    presence: true

  validates :username,
    uniqueness: true,
    presence: true

  validates_confirmation_of :password
end

class Membership < ActiveRecord::Base
  belongs_to :user
  belongs_to :board

  validates :user, presence: true, uniqueness: { scope: :board, message: "User is already a member of that board" }
  validates :board, presence: true
end

类列表：会员资格，：来源=>：董事会
验证是否存在：title
验证是否存在：电路板
结束

user.rb

    class Board < ActiveRecord::Base
  belongs_to :owner, class_name: "User", foreign_key: "user_id"

  has_many :lists
  has_many :memberships
  has_many :members, :through => :memberships, :source => :user
  has_many :lists, :through => :memberships, :source => :board

  validates_presence_of :title
  validates_presence_of :owner

  def is_private?
    return self.is_private
  end
end

class List < ActiveRecord::Base
  belongs_to :board
  has_many :cards

  has_one :board, :through => :memberships, :source => :board

  validates_presence_of :title
  validates_presence_of :board
end

class User < ActiveRecord::Base
  has_many :boards
  has_many :lists
  has_many :cards
  has_many :memberships
  has_many :board_memberships, :through => :memberships, :source => :board
  has_many :list_memberships, :through => :memberships, :source => :board

  has_secure_password

  validates :password,
    length: { :minimum => 8 },
    presence: true

  validates :username,
    uniqueness: true,
    presence: true

  validates_confirmation_of :password
end

class Membership < ActiveRecord::Base
  belongs_to :user
  belongs_to :board

  validates :user, presence: true, uniqueness: { scope: :board, message: "User is already a member of that board" }
  validates :board, presence: true
end

class用户：成员身份，：来源=>：董事会
拥有多个：列表成员身份，：至=>：成员身份，：来源=>：董事会
有安全的密码吗
验证：密码，
长度：{：最小=>8}，
存在：真实
验证：用户名，
独特性：没错，
存在：真实
验证密码的确认
结束

会员资格。rb

    class Board < ActiveRecord::Base
  belongs_to :owner, class_name: "User", foreign_key: "user_id"

  has_many :lists
  has_many :memberships
  has_many :members, :through => :memberships, :source => :user
  has_many :lists, :through => :memberships, :source => :board

  validates_presence_of :title
  validates_presence_of :owner

  def is_private?
    return self.is_private
  end
end

class List < ActiveRecord::Base
  belongs_to :board
  has_many :cards

  has_one :board, :through => :memberships, :source => :board

  validates_presence_of :title
  validates_presence_of :board
end

class User < ActiveRecord::Base
  has_many :boards
  has_many :lists
  has_many :cards
  has_many :memberships
  has_many :board_memberships, :through => :memberships, :source => :board
  has_many :list_memberships, :through => :memberships, :source => :board

  has_secure_password

  validates :password,
    length: { :minimum => 8 },
    presence: true

  validates :username,
    uniqueness: true,
    presence: true

  validates_confirmation_of :password
end

class Membership < ActiveRecord::Base
  belongs_to :user
  belongs_to :board

  validates :user, presence: true, uniqueness: { scope: :board, message: "User is already a member of that board" }
  validates :board, presence: true
end

类成员资格


控制器
boards\u controller.rb（我只在这里添加了相关部分）
类BoardsController“未找到板或无法访问”，然后返回
结束
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def授权联合会会员资格
返回
如果@board.u是私人的？
如果！证明…是真实的
将\重定向到根\ url，：notice=>“请先登录”并返回
结束
如果@board.owner！=当前用户| |@董事会成员。包括？（当前用户）
将_重定向到root_url，：notice=>“未找到板或无法访问”，然后返回
结束
结束
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#邮政局
#POST/boards.json
def创建
@线路板=线路板。新建（线路板参数）
@board.owner=当前用户
回应待办事项|格式|
如果@board.save
format.html{将_重定向到@board，注意：'board已成功创建。}
format.json{render:show，status:：created，location:@board}
其他的
format.html{render:new}
format.json{render json:@board.errors，status:：unprocessable_entity}
结束
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结束

列出\u controller.rb（整个文件）
class ListsController