我有以下型号
class Survey < ActiveRecord::Base has_many :survey_sections accepts_nested_attributes_for :survey_sections end class SurveySection < ActiveRecord::Base belongs_to :survey has_many :questions accepts_nested_attributes_for :questions end class Question < ActiveRecord::Base belongs_to :survey_section has_many :answers belongs_to :question_group accepts_nested_attributes_for :question_group accepts_nested_attributes_for :answers end class Answer < ActiveRecord::Base belongs_to :question end class QuestionGroup < ActiveRecord::Base has_many :questions end
我的控制器：
def new
@survey = Survey.new
survey_section = @survey.survey_sections.build
survey_section.questions.build
end
def create
@survey = Survey.new(survey_params)
if @survey.save
redirect_to @survey,notice: 'Super'
else
render 'new'
end
end
def survey_params
params.require(:survey).permit(:title,:description,survey_sections_attributes:[:id,:title,questions_attributes:[:id,:text,answers_attributes:[:id,:text]]])
end
如何在3个以上的模型中保存数据？
目前,我可以将调查表格数据保存到调查,调查部分和问题模型中.但我不知道在控制器中我可以将数据保存到其他模型中.
解决方法
如果正确使用
fields_for帮助程序,则可以根据需要处理任意数量的表单.
这就是你认为(你的控制器似乎没问题).
我还有wrote an answer about this回来了.
#app/models/survey.rb
class Survey < ActiveRecord::Base
has_many :sections
accepts_nested_attributes_for :sections
end
#app/models/section.rb
class Section < ActiveRecord::Base
belongs_to :survey
has_many :questions
accepts_nested_attributes_for :questions
end
#app/models/question.rb
class Question < ActiveRecord::Base
belongs_to :section
has_many :answers
end
尽量保持您的模型名称尽可能简洁.
#app/controllers/surveys_controller.rb
class SurveysController < ApplicationController
def new
@survey = Survey.new
@survey.sections.build.questions.build
end
def create
@survey = Survey.new survey_params
@survey.save
end
private
def survey_params
params.require(:survey).permit(:title,sections_attributes: [:title,questions_attributes:[:title]])
end
end
#app/views/surveys/new.html.erb
<%= form_for @survey do |f| %>
<%= f.text_field :title %>
<%= f.fields_for :sections do |section| %>
<%= section.text_field :title %>
<%= section.fields_for :questions do |question| %>
<%= question.text_field :title %>
<% end %>
<% end %>
<%= f.submit %>
<% end %>