Rails 强参数和嵌套表单：“不允许的参数：答案”

Question

我有一个评估模型，其中包含许多问题和许多通过问题的答案

class Assessment < ActiveRecord::Base
  belongs_to :template
  belongs_to :patient
  has_many :questions, :through=> :template
  has_many :answers, :through=> :questions
  accepts_nested_attributes_for :answers
end

class Question < ActiveRecord::Base
  belongs_to :template
  has_many :answers
end

class Answer < ActiveRecord::Base
  belongs_to :question
  belongs_to :assessment
end

我想创建一个可以接受嵌套属性的评估表。

这是我的评估表：

<%= form_for @assessment do |f| %>

    <div role="tabpanel" class="tab-pane active" id="subjective">
      <% @assessment.questions.each do |question| %>
        <%= render 'question_fields', :question=> question, :f=> f %>
      <% end %>
    </div>

  <%= f.hidden_field :patient_id, :value=> @assessment.patient.id %>
  <%= f.hidden_field :template_id, :value=> @assessment.id %>
  <%= f.submit 'Save', :class=> "btn btn-primary", :style=>"width: 100%;" %>

<% end %>

还有我的 question_fields：

<p><%= question.content %></p>

<%= f.fields_for :answer do |builder| %>

  <div class="row">
    <div class="col-sm-10 question">
      <% if question.field_type == "text_area" %>
        <%= builder.text_area :content, :class=>"form-control" %>
      <% end %>
    </div>
  </div>

最后是我的行动：

def create
    @assessment = current_user.assessments.new(assessment_params)

    if @assessment.save
      redirect_to assessments_path
    else
      render :new
    end
  end


protected

   def assessment_params
      params.require(:assessment).permit(
        :template_id, :patient_id,
        :answers_attributes => [:id, :question_id, :assessment_id, :tracking,    :content])
   end

当我提交表单时，我被带到了评估路径，但我的日志显示“未经许可的参数答案”。我知道我的复数形式或关联在某个地方出了问题，但不确定具体在哪里。

Answer 1

试一试，您的 accepts_nested_attributes_for :answers 似乎放错了位置，而您错过了 questions 的位置。

class Assessment < ActiveRecord::Base
  belongs_to :template
  belongs_to :patient
  has_many :questions, :through=> :template
  has_many :answers, :through=> :questions
  accepts_nested_attributes_for :questions
end

class Question < ActiveRecord::Base
  belongs_to :template
  has_many :answers
  accepts_nested_attributes_for :answers
end

class Answer < ActiveRecord::Base
  belongs_to :question
  belongs_to :assessment
end