ruby-on-rails – Ruby on Rails应用程序上的AssociationTypeMis
发布时间：2020-12-16 22:02:02 所属栏目：百科 来源：网络整理
导读：我的 ruby在rails应用程序中遇到问题.我有两个模型 – “病人”和“地址”,病人有一个地址,一个地址属于病人. Patient.rb class Patient ActiveRecord::Base has_many :charge_slips has_one :address validates_presence_of :last_name validates_presence_
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ruby在rails应用程序中遇到问题.我有两个模型 – “病人”和“地址”,病人有一个地址,一个地址属于病人.
Patient.rb class Patient < ActiveRecord::Base has_many :charge_slips has_one :address validates_presence_of :last_name validates_presence_of :first_name validates_presence_of :middle_name end Address.rb class Address < ActiveRecord::Base belongs_to :patient validates_associated :patient end 患者controller.rb class PatientController < ApplicationController
def index
@title = "Outpatient Services - Patient"
@today = Date.today.to_formatted_s(:long)
@patients = Patient.find(:all)
end
def new
@patient = Patient.new
@address = Address.new
end
def create
@patient = Patient.new(params[:patient])
@patient.created_on = Date.today.to_formatted_s(:long)
if @patient.save
@address = Address.new(params[:address])
@address.patient_id = @patient.id
if @address.save
redirect_to :action => 'index'
else
redirect_to :action => 'new'
end
redirect_to :action => 'index'
else
redirect_to :action => 'new'
end
end
end
new.html.rb <%= content_tag('h3','Create New Patient') %>
<hr>
<% form_for @patient,:url => { :action => "create" } do |patient_form| -%>
<%= error_messages_for :patient %>
<%= patient_form.label :last_name,'Last Name:' %> <%= patient_form.text_field :last_name,:size => 30 %><br>
<%= patient_form.label :first_name,'First Name:' %> <%= patient_form.text_field :first_name,:size => 30 %><br>
<%= patient_form.label :middle_name,'Middle Name:' %> <%= patient_form.text_field :middle_name,:size => 30 %><br>
<fieldset>
<legend>Patient's Permanent Address</legend>
<%= error_messages_for :address %>
<% patient_form.fields_for @address do |address_fields| -%>
<%= address_fields.label :street_name,'Street Name:' %> <%= address_fields.text_field :street_name %><br>
<%= address_fields.label :barangay,'Barangay:' %> <%= address_fields.text_field :barangay %><br>
<%= address_fields.label :city_municipality,'City/Municipality:' %> <%= address_fields.text_field :city_municipality %><br>
<%= address_fields.label :country,'Country:' %> <%= address_fields.text_field :country %><br>
<%= address_fields.label :zip_cide,'Zip Code:' %> <%= address_fields.text_field :zip_code %><br>
<% end -%>
</fieldset>
<%= submit_tag "Add Patient" %>
<% end -%>
每次我添加一个新病人,都会抛出一个错误.这是错误的一部分： ActiveRecord::AssociationTypeMismatch in PatientController#create Address(#31360520) expected,got HashWithIndifferentAccess(#23815500) RAILS_ROOT: C:/www/Outpatient Application Trace | Framework Trace | Full Trace C:/ruby/lib/ruby/gems/1.8/gems/activerecord-2.3.3/lib/active_record/associations/association_proxy.rb:263:in `raise_on_type_mismatch' C:/ruby/lib/ruby/gems/1.8/gems/activerecord-2.3.3/lib/active_record/associations/has_one_association.rb:52:in `replace' C:/ruby/lib/ruby/gems/1.8/gems/activerecord-2.3.3/lib/active_record/associations.rb:1246:in `address=' C:/ruby/lib/ruby/gems/1.8/gems/activerecord-2.3.3/lib/active_record/base.rb:2740:in `send' C:/ruby/lib/ruby/gems/1.8/gems/activerecord-2.3.3/lib/active_record/base.rb:2740:in `attributes=' C:/ruby/lib/ruby/gems/1.8/gems/activerecord-2.3.3/lib/active_record/base.rb:2736:in `each' C:/ruby/lib/ruby/gems/1.8/gems/activerecord-2.3.3/lib/active_record/base.rb:2736:in `attributes=' C:/ruby/lib/ruby/gems/1.8/gems/activerecord-2.3.3/lib/active_record/base.rb:2434:in `initialize' C:/www/Outpatient/app/controllers/patient_controller.rb:14:in `new' C:/www/Outpatient/app/controllers/patient_controller.rb:14:in `create' 我是RoR的新人,想通过实践学习语言.我想知道代码可能有什么问题.谢谢！ 解决方法
首先,您的患者模型需要一个accepted_nested_attributes_for
class Patient < ActiveRecord::Base has_many :charge_slips has_one :address validates_presence_of :last_name validates_presence_of :first_name validates_presence_of :middle_name accepts_nested_attributes_for :address end 您的控制器可以简化很多.没有必要单独保存地址,因为@ patient.save会照顾这个.你不需要设置 另请注意,我将您的控制器类重命名为PatientsController而不是PatientController.这将更符合Rails的RESTful约定,并且还将帮助您简化您的视图.如果你这样做,你需要一个map.resources：routes.db文件中的病人,你也需要重命名你的文件. class PatientsController < ApplicationController
def index
@title = "Outpatient Services - Patient"
@today = Date.today.to_formatted_s(:long)
@patients = Patient.find(:all)
end
def new
@patient = Patient.new
@patient.build_address
end
def create
@patient = Patient.new(params[:patient])
if @patient.save
redirect_to :action => 'index'
else
render :action => 'new'
end
end
end
你的看法有一个小错误.它需要是fields_for：address而不是fields_for @address.此外,由于您的控制器现在是RESTful,您可以删除：url => {：action => “创建”}部分. <%= content_tag('h3','Create New Patient') %>
<hr>
<% form_for @patient do |patient_form| -%>
<%= error_messages_for :patient %>
<%= patient_form.label :last_name,:size => 30 %><br>
<fieldset>
<legend>Patient's Permanent Address</legend>
<%= error_messages_for :address %>
<% patient_form.fields_for :address do |address_fields| -%>
<%= address_fields.label :street_name,'Street Name:' %> <%= address_fields.text_field :street_name %><br>
<%= address_fields.label :barangay,'Barangay:' %> <%= address_fields.text_field :barangay %><br>
<%= address_fields.label :city_municipality,'City/Municipality:' %> <%= address_fields.text_field :city_municipality %><br>
<%= address_fields.label :country,'Country:' %> <%= address_fields.text_field :country %><br>
<%= address_fields.label :zip_cide,'Zip Code:' %> <%= address_fields.text_field :zip_code %><br>
<% end -%>
</fieldset>
<%= submit_tag "Add Patient" %>
<% end -%>
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