rails:更新记录嵌套的两个连接表深

时间:2013-08-12 21:53:30

标签: ruby-on-rails activerecord

我有一个让我很困惑的问题。

我有四个模型,一个锻炼模型,一个锻炼模型,一个exercise_exercise连接模型和一个workout_exercise_set模型。

我可以通过workout_exercises连接表为锻炼添加练习。现在我正在尝试将训练集添加到练习中,这就是workout_exercises_sets表的用途。

这是一个例子。

Workout   
  Exercise 1
    Set 1
    Set 2
    Set 3   
  Exercise 2
    Set 1
    Set 2
    Set 3   
  Exercise 3
    etc.

workouts/edit.html.erb我有一个表单,我可以在其中查看锻炼中的所有练习,并使用form_forfields_for编辑集合数量,但是当我尝试更新时锻炼或整个锻炼我得MassAssignmentSecurity::Error in WorkoutsController#updateCan't mass-assign protected attributes: workout_exercise_sets。我无法弄清楚如何克服这个问题。我知道我正在编辑锻炼,但我不是要写一个名为workout_exercise_sets的字段,所以我真的很困惑。我非常感谢任何指导。所有相关代码如下。

workout/edit.html.erb:

<%= form_for(@workout) do |f| %>
    <%= f.label :name %><br />
    <%= f.text_field :name %><br />
    <%= f.label :description %><br>
    <%= f.text_area :description %></br>
        <%= f.fields_for :workout_exercises do |s| %>
                <%= s.object.exercise.name %></b>
                    <%= s.fields_for :workout_exercise_sets do |set| %> 
                        <%= set.label :set_number %>:
                        <%= set.number_field :set_number %>     
                        <%= set.label :reps %>:
                        <%= set.number_field :repetitions %>
                        <%= set.label :rest_time %>(seconds):
                        <%= set.number_field :rest_time %>
                        <%= set.submit %>
                    <% end %>
                <%= s.hidden_field :_destroy %>
                <%= link_to "Remove exercise?", '#', class: "remove_fields" %>
        <% end %>
    <%= f.submit %>
<% end %>

这是锻炼模型:

class Workout < ActiveRecord::Base
  attr_accessible :name, :exercises_attributes, :workout_exercises_attributes, :exercise_order, :description

  has_many :workout_exercises, dependent: :destroy, :order => "exercise_order DESC"
  has_many :exercises, through: :workout_exercises

  accepts_nested_attributes_for :exercises
  accepts_nested_attributes_for :workout_exercises, allow_destroy: :true

end

以下是运动模型:

class Exercise < ActiveRecord::Base
  attr_accessible :name, :description

  has_many :workout_exercises
  has_many :workouts, through: :workout_exercises

  validates :name,        uniqueness: :true, presence: :true
  validates :description, uniqueness: :true, presence: :true

end

这是workout_exercise模型:

class WorkoutExercise < ActiveRecord::Base
  attr_accessible :exercise_id, :workout_id

  belongs_to :exercise
  belongs_to :workout

  has_many :workout_exercise_sets, dependent: :destroy 
  accepts_nested_attributes_for :workout_exercise_sets, allow_destroy: :true

end

最后,这是workout_exercise_sets模型:

class WorkoutExerciseSet < ActiveRecord::Base
  attr_accessible :repetitions, :rest_time, :set_number, :workout_exercise_id

  belongs_to :workout_exercise
end

为了更好地衡量,这是DB的图表:enter image description here

1 个答案:

答案 0 :(得分:1)

我认为在您的workout_excercise.rb文件中,您应该将:workout_exercise_sets_attributes添加到attr_accessible列表中。

class WorkoutExercise < ActiveRecord::Base
  attr_accessible :exercise_id, :workout_id, :workout_exercise_sets_attributes

  belongs_to :exercise
  belongs_to :workout

  has_many :workout_exercise_sets, dependent: :destroy 
  accepts_nested_attributes_for :workout_exercise_sets, allow_destroy: :true

end