Question

我尝试在access_module_id中验证关联的属性role 模型，但它不起作用。如何以presence: true形式验证role到其他模型的属性？这是协会

role.rb

class Role < ActiveRecord::Base
  ....
  has_many :access_module_roles, :dependent => :destroy
  has_many :access_modules, through: :access_module_roles

  validates :name,:access_module_id, presence: true  # I want to validate presence of access_module_ids in role form

end

access_module.rb

class AccessModule < ActiveRecord::Base
  has_many :access_module_roles
  has_many :roles, through: :access_module_roles
end

access_module_roles.rb

class AccessModuleRole < ActiveRecord::Base
  belongs_to :access_module
  belongs_to :role

end

更新

我已尝试过以下验证，如果我选择一个，两个或所有仍然会收到错误，例如＆＃34;访问模块ID不能为空白＆＃34;

  validates_presence_of :access_module_ids

控制器

def create
    @role = Role.new(role_params)

    respond_to do |format|
      if @role.save
        params[:role][:access_module_ids].each do |acmi|
          AccessModuleRole.create!(:role_id => @role.id, :access_module_id => acmi) if acmi!=""
        end
        format.html { redirect_to roles_path, notice: 'Role was successfully created.' }
        format.json { render :index, status: :created, location: @role }
      else
        format.html { render :new }
        format.json { render json: @role.errors, status: :unprocessable_entity }
      end
    end
  end

Answer 1

我发现我在Create方法中犯了错误。我在保存后将数据插入AccessModuleRole，因此在创建时会出现验证错误。并且参数为nil

更正后的代码：

def create
    @role = Role.new(role_params)
    @role.access_module_ids = params[:role][:access_module_ids]

    respond_to do |format|
      if @role.save
        format.html { redirect_to roles_path, notice: 'Role was successfully created.' }
        format.json { render :index, status: :created, location: @role }
      else
        format.html { render :new }
        format.json { render json: @role.errors, status: :unprocessable_entity }
      end
    end
  end

允许角色的属性：

private
 def role_params
      params.require(:role).permit(:name,:chk_ids ,:description, :code, :is_active, :access_module_ids)
 end

现在它完美无缺..感谢RAJ指点我：）

如何对关联的属性执行验证

更新

1 个答案: