has_many :通过不从表单插入数据库

Question

我已经尝试了类似问题的所有解决方案，但还没有弄明白这个。

我在 'Clinician' 和 'Patient' 之间有一个 has_many :through 关系，并且有一个联合模型 'CareGroupAssignment'。我希望 patient 能够关联多个 clinicians，而 clinicians 将关联多个 patients.

当我提交表单时，记录如下： Started POST "/patients" for 127.0.0.1 at 2015-09-02 14:56:38 -0700 Processing by PatientsController#create as HTML Parameters: {"utf8"=>"✓", "authenticity_token"=>"XXX=", "patient"=>{"user_attributes"=>{"email"=>"allencentre", "password"=>"[FILTERED]"}, "first_name"=>"Allen", "last_name"=>"Centre", "birth_date(1i)"=>"2002", "birth_date(2i)"=>"9", "birth_date(3i)"=>"2", "clinician_ids"=>["85", "87"], "patient_deceased"=>"0", "patient_archived"=>"0"}, "button"=>""}

所以 "clinician_ids"=>["85", "87"] 是从表单传递的。

有一个 INSERT INTO "users" ("email", .... 和一个 INSERT INTO "patients" ("bir....，但是 care_group_assignments 的数据没有。

有[36mCareGroupAssignment Load (0.4ms)[0m [1mSELECT "care_group_assignments".* FROM "care_group_assignments" WHERE "care_group_assignments"."patient_id" = [0m [["patient_id", 199]]

clinician.rb（简体）

class Clinician < ActiveRecord::Base
    belongs_to :care_group

    has_many :patients ,:through=> :care_group_assignments
    has_many :care_group_assignments, :dependent => :destroy

    belongs_to :user
    accepts_nested_attributes_for :user,  :allow_destroy => true
end

patient.rb

class Patient < ActiveRecord::Base
    belongs_to :care_group

    has_many :clinicians ,:through=> :care_group_assignments
    has_many :care_group_assignments

    belongs_to :user
    accepts_nested_attributes_for :user,  :allow_destroy => true
end

care_group_assignments.rb

class CareGroupAssignment < ActiveRecord::Base
    belongs_to :clinician
    belongs_to :patient
end

这是在遵循 Railscasts PRO #17- HABTM Checkboxes 中的示例，至少开始收集数据并正确设置模型。下面是每个临床医生的复选框，如 RailsCast 中所述，复选框显示并且数据已发送但未存储（无法弄清楚原因）。

患者new.html.erb表格

<%= form_for @patient do |form| %>

  <%= form.fields_for :user do |builder| %>
   <div class="form-group">
      <%= builder.label "Email or Username" %>
      <%= builder.text_field :email, class: "form-control" %>
    </div>
    <div class="form-group">
      <%= builder.label :password %>
      <%= builder.password_field :password, class: "form-control" %>
    </div>
  <% end %>

  <div class="form-group">
    <%= form.label :first_name %>
    <%= form.text_field :first_name, class: "form-control", placeholder: "First name" %>
  </div>

  <div class="form-group">
    <%= form.label :last_name %>
    <%= form.text_field :last_name, class: "form-control", placeholder: "Last name" %>
  </div>

  <div class="form-group">
    <% Clinician.where(care_group_id: @care_group.id).each do |clinician| %>
      <%= check_box_tag "patient[clinician_ids][]", clinician.id, @patient.clinician_ids.include?(clinician.id), id: dom_id(clinician) %>
      <%= label_tag dom_id(clinician), clinician.full_name %><br>
    <% end %>
  </div>

  <%= form.button 'Create Patient', class: "btn btn-u btn-success" %>
<% end %>

此方法目前无法保存 clinician 到 patient 关联。

patient_controller.rb

def new
  @patient = Patient.new
  @user = User.new
  @patient.build_user

  @care_group = current_clinician.care_group
end

def create
  @patient = Patient.create(patient_params)
  @patient.care_group = current_clinician.care_group

  if @patient.save
    redirect_to patient_path(@patient), notice: "New patient created!"
  else
    render "new"
  end
end

def show
 @patient = Patient.find_by(id: params["id"])
end

private
 def patient_params
  params.require(:patient).permit({:clinician_ids => [:id]},:first_name,:last_name,:user_id,:birth_date, user_attributes: [ :email, :password, :patient_id, :clinician_id ])
 end

我计划在患者 show 页面上显示与 patient 关联的 clinicians：

患者show.html.erb

<strong>Shared with:</strong>
 <% @patient.clinicians.each do |clinician| %>
  <%= clinician.full_name %><
 <% end %>

如果我为数据库做种，这会起作用，但由于数据似乎没有存储，所以没有显示任何内容。

Rails 4.1.8，ruby 2.2.1p85，PostgreSQL

谢谢

Answer 1

我认为您的问题出在控制器中的这一行：

params.require(:patient).permit({:clinician_ids => [:id]}...

应该是：

params.require(:patient).permit({:clinician_ids => []}...

has_many :通过不从表单插入数据库

has_many :throught not INSTERING INTO database from form

ruby

forms

ruby-on-rails

has-many-through

strong-parameters