Ruby on rails 在同一视图中创建这两个模型有许多属于子模型和父模型的关联

所以我有两个模型：

#app/models/diy.rb
class Diy < Activerecord::Base
   #schema id | summary | created_at | updated_at 
   has_many :steps
end

#app/models/step.rb
class Step < ActiveRecord::Base
   # schema id | step_content | photo | created_at | updated_at
   belongs_to :diy
end

#app/models/diy.rb
类Diy

有没有办法在同一视图中创建diy数据库行并与之关联的step数据库行

最接近我的是：

 <%= form_for(@diy) do |f| %>
   <%= f.label :summary  %><br>
   <%= f.text_field :summary %><br>
   <%= f.label :steps  %><br>
   <%= f.text_field :steps %><br>
   <%= f.submit %>
 <% end %>

但使用这段代码，我不会访问step表中的任何列

如果这有助于解决问题，那么通过这段代码，我会得到“Steps”文本字段，该字段已经填充了“Step:：ActiveRecord\u Associations\u CollectionProxy:0x9613ce0”

要创建表单输入，请使用：

为了避免收到一堆垃圾步骤，您可以使用

如果
则拒绝\u选项：

class Diy < ActiveRecord::Base
  has_many :steps
  accepts_nested_attributes_for :steps, reject_if: :all_blank
end

请阅读：




要创建表单输入，请使用：

为了避免收到一堆垃圾步骤，您可以使用
如果
则拒绝\u选项：

class Diy < ActiveRecord::Base
  has_many :steps
  accepts_nested_attributes_for :steps, reject_if: :all_blank
end

请阅读：



要添加到
@Max
的答案中，您需要使用以下选项：

#app/models/diy.rb
class Diy < Activerecord::Base
   #schema id | summary | created_at | updated_at 
   has_many :steps
   accepts_nested_attributes_for :steps
end

#app/controllers/diys_controller.rb
class DiysController < ApplicationController
   def new
      @diy = Diy.new
      @diy.steps.build
   end

   def create
      @diy = Diy.new diy_params
      @diy.save
   end

   private

   def diy_params
      params.require(:diy).permit(steps_attributes: [:step_content])
   end
end

#app/views/diys/new.html.erb
<%= form_for @diy do |f| %>
   <%= f.fields_for :steps do |s| %>
      <%= s.number_field :step_count %>
   <% end %>
   <%= f.submit %>
<% end %>

要添加到
@Max
的答案中，您需要使用以下选项：

#app/models/diy.rb
class Diy < Activerecord::Base
   #schema id | summary | created_at | updated_at 
   has_many :steps
   accepts_nested_attributes_for :steps
end

#app/controllers/diys_controller.rb
class DiysController < ApplicationController
   def new
      @diy = Diy.new
      @diy.steps.build
   end

   def create
      @diy = Diy.new diy_params
      @diy.save
   end

   private

   def diy_params
      params.require(:diy).permit(steps_attributes: [:step_content])
   end
end

#app/views/diys/new.html.erb
<%= form_for @diy do |f| %>
   <%= f.fields_for :steps do |s| %>
      <%= s.number_field :step_count %>
   <% end %>
   <%= f.submit %>
<% end %>

class Diy < ActiveRecord::Base
  has_many :steps
  accepts_nested_attributes_for :steps, reject_if: :all_blank
end

def diy_params
  params.require(:diy).permit(:summary, steps_attributes: [:step_content])
end

#app/models/diy.rb
class Diy < Activerecord::Base
   #schema id | summary | created_at | updated_at 
   has_many :steps
   accepts_nested_attributes_for :steps
end

#app/controllers/diys_controller.rb
class DiysController < ApplicationController
   def new
      @diy = Diy.new
      @diy.steps.build
   end

   def create
      @diy = Diy.new diy_params
      @diy.save
   end

   private

   def diy_params
      params.require(:diy).permit(steps_attributes: [:step_content])
   end
end

#app/views/diys/new.html.erb
<%= form_for @diy do |f| %>
   <%= f.fields_for :steps do |s| %>
      <%= s.number_field :step_count %>
   <% end %>
   <%= f.submit %>
<% end %>

#controller
def diy_params
   params.require(:diy).permit(step_ids: [])
end

#app/views/diys/new.html.erb
<%= form_for @diy do |f| %>
   <%= f.collection_select :step_ids, Step.all, :id, :name %>
   <%= f.submit %>
<% end %>