コードをクリーンアップしたところ、見栄えが良くなりましたが、まだ機能しません。それは苦痛になり始めます…</p>
親 has_many childs :through joinmodel を使用してネストされた形式で既存の子を持つ親を保存することはできません。
私の場合、プロジェクトには多くの貢献する教師と多くの貢献する生徒がいて、どちらもユーザーへの参加モデルです。プロジェクトには、学校もたくさんあります。
(モデルの名前は、Teacherize と Pupilize、または ProjectTeacher と ProjectPupil の方が適切かもしれません。)
すべてのレコードが新しい限り、すべて正常に機能します。既存のユーザーを新しいプロジェクトの新しい教師として接続しようとするとすぐに、次のエラーが発生します。
Couldn't find User with ID=1 for Teacher with ID=
(1 が正しいユーザー ID です)
問題は、空のフォーム フィールドをセットアップするために、私のヘルパーのどこかにあるはずです。
少なくとも私はそう思います...
module ProjectsHelper
def setup_project(project)
if project.teachers.length <= 0 # usually there is just one teacher, so add one if there isn't one
teacher = project.teachers.build(:role_in_project => 'master')
if user_signed_in?
#teacher = project.teachers.new(:role_in_project => 'master', :user => current_user)
teacher.user = current_user # associate first teacher with current_user
else
#teacher = project.teachers.build
teacher.user = User.new # associate first teacher with a new user instance
end
end
if project.project_schools.length <= 0 # usually there is just one school, so add one if there isn't one
project_school = project.project_schools.build
project_school.school = School.new
end
if project.pupils.length < 3 # There can be up to 3 people, so add a blank fieldset as long as there are less than 3
pupil = project.pupils.build
pupil.user = User.new
end
project
end
end
これらは受け取った私のパラメータです:
{"utf8"=>"✓", "authenticity_token"=>"uCCMk/s3SpDfR7+fXcsCOHPvfvivBQv8pVFVhdh6iro=",
"project"=>{
"teachers_attributes"=>{
"0"=>{
"id"=>"",
"user_attributes"=>{
"id"=>"1",
"gender"=>"male",
"title"=>"",
"firstname"=>"Firstname1",
"name"=>"Lastname1",
"faculty"=>"",
"fon"=>"",
"fax"=>""}
}
},
"id"=>"",
"title"=>"First Project",
"description"=>"This is a foo bar project!",
"presentation_type"=>"experimentell",
"note"=>""
},
"commit"=>"Register Project",
"action"=>"create",
"controller"=>"projects"
}
ケースは抽象的すぎません。それを達成することが可能でなければなりません。新しい親レコードを既存の子レコードに接続するだけです!
非常に優れたこの記事では、まさにそのケースが説明されています: http://rubysource.com/complex-rails-forms-with-nested-attributes
# app/helpers/form_helper
module FormHelper
def setup_user(user)
user.address ||= Address.new
(Interest.all - user.interests).each do |interest|
user.interest_users.build(:interest => interest)
end
user.interest_users.sort_by! {|x| x.interest.name }
user/tmp/clean-controllers.md.html
end
end
関心が存在し、interest_uesers の新しいレコードを介して接続されます。
同じことをしようとするとエラーが発生するのはなぜですか?
project.teachers.build(:user => current_user)
私はいくつかの記事やキャストを調べましたが、どれも既存のチャイルドを結び付けていません。 http://railscasts.com/episodes/196-nested-model-form-revised http://apidock.com/rails/ActionView/Helpers/FormHelper/fields_for http://api.rubyonrails.org/classes/ActiveRecord/ NestedAttributes/ClassMethods.html Rails 3.1+ ネストされたフォームの問題: 保護された属性を一括割り当てできない
accept_nested_attributes_for と has_and_belongs_to_many を使用しようとしていますが、結合テーブルにデータが入力されていません
引用: 「accepts_nested_fields_for は、フォーム内の関連オブジェクトを作成および変更するために使用されます。結合テーブルにデータを入力するために使用できます。これは、あなたがやろうとしていることのようなものです。ただし、accepts_nested_fields_for を使用して結合テーブルに入力することは、HABTM 関係では不可能です。」</p>
それが私がやりたいことです！結合テーブルにデータを入力してください! いらいらし始めています。助けていただければ幸いです。
マイモデル
class Project < ActiveRecord::Base
attr_accessible :title, :description, :presentation_type, :note,
:project_schools_attributes, :schools_attributes, :teachers_attributes, :pupils_attributes,
:users_attributes
validates_presence_of :title
validates_presence_of :description
validates_presence_of :presentation_type
has_many :project_schools, :dependent => :destroy
accepts_nested_attributes_for :project_schools
has_many :schools, :through => :project_schools
#accepts_nested_attributes_for :schools, :reject_if => :all_blank
has_many :pupils, :dependent => :destroy
accepts_nested_attributes_for :pupils, :reject_if => :all_blank
has_many :users, :through => :pupils
has_many :teachers, :dependent => :destroy
accepts_nested_attributes_for :teachers, :reject_if => :all_blank
has_many :users, :through => :teachers
#accepts_nested_attributes_for :users, :reject_if => :all_blank
end
class ProjectSchool < ActiveRecord::Base
attr_accessible :role_in_project, :comment,
:school_attributes, :school_id, :project_id
belongs_to :school
accepts_nested_attributes_for :school
belongs_to :project
end
class School < ActiveRecord::Base
attr_accessible :email, :fax, :fon, :name, :place, :street, :type_of_school, :www, :zip
has_many :project_schools
has_many :projects, :through => :project_schools
has_many :users # in real live they are named teachers and pupils but in this case the association goes directly to a user_id, not to teacher/pupil model
validates_presence_of :name, :type_of_school, :street, :place, :zip, :fon
validates :email, :format => { :with => /\A([^@\s]+)@((?:[-a-z0-9]+\.)+[a-z]{2,})\Z/i, :on => :create }, :allow_blank => true
end
class Teacher < ActiveRecord::Base
attr_accessible :role_in_project, :user, :user_attributes, :project_id, :user_id
belongs_to :project
belongs_to :user
accepts_nested_attributes_for :user
serialize :role_in_project
end
class Pupil < ActiveRecord::Base
attr_accessible :classname, :user_attributes #, :project_id, :user_id
belongs_to :project
belongs_to :user
accepts_nested_attributes_for :user
end
class User < ActiveRecord::Base
serialize :roles
belongs_to :school
has_many :teachers
has_many :pupils
has_many :projects, :through => :teachers
has_many :projects, :through => :pupils
# Setup accessible (or protected) attributes for your model
attr_accessible :email, :gender, :firstname, :name, :street, :place, :title, :faculty, :assignment,
:classname, :zip, :fon, :fax, :school_id, :roles,
:password, :added_by_user_id, :password_confirmation, :remember_me
# Include default devise modules. Others available are:
# :token_authenticatable, :confirmable,
# :lockable, :timeoutable and :omniauthable
devise :database_authenticatable, :registerable,
:recoverable, :rememberable, :trackable#, :validatable
after_initialize :init
def init
# the default guest user
self.roles ||= ['default'] #will set the default value only if it's nil
end
end
私のコントローラー
class ProjectsController < ApplicationController
require 'axlsx'
before_filter :load_page, only: [:show, :index, :destroy]
def new
@project = Project.new
end
def create
@project = Project.new(params[:project])
respond_to do |format|
if @project.save
sign_in(:user, @project.teachers[0].user) unless user_signed_in?
# TODO: send mail
# save as excel file in dropbox
save_in_dropbox(@project)
format.html { redirect_to @project, notice: t('project.was_created') }
else
logger.debug @project.errors.inspect
format.html { render action: "new" }
end
end
end
end
プロジェクト/_form.html.haml
%h1
= t('project.register_headline')
= simple_form_for( setup_project(@project), :html => {:class => 'form-horizontal'} )do |f|
= f.error_notification
#teachers-wrapper.well
%span.jumpanchor#lehrkraft_anchor
%fieldset.form-inputs
= f.simple_fields_for :teachers do |teacher|
= render "teacher_fields", :f => teacher
.school-wrapper.well
%span.jumpanchor#schule_anchor
%h2
Informationen zur Schule
%fieldset.form-inputs
= f.simple_fields_for :project_schools do |project_school|
= render "school_fields", :f => project_school
.project-wrapper.well
%span.jumpanchor#projekt_anchor
%h2
Informationen zum Projekt der Schüler
%fieldset.form-inputs
= f.hidden_field :id
= f.input :title, :input_html => { :class => 'span6' }
= f.input :description, :input_html => { :class => 'span6', rows: 5 }
= f.input :presentation_type, collection: ['theoretisch', 'experimentell'], as: :radio_buttons, :class => 'controls-row', :input_html => { :class => 'inline' }
.clearfix
= f.input :note, :input_html => { :class => 'span6', rows: 3 }
.pupils-wrapper.well
%span.jumpanchor#schuler_anchor
%fieldset.form-inputs
= f.simple_fields_for :pupils do |pupil|
= render "pupil_fields", :f => pupil
projects/_teacher_fields.html.haml
= f.simple_fields_for :user do |user|
=# render "teacher_user_fields", :f => user
%h2
Betreuende Lehrkraft
- if user_signed_in?
= user.input :email, :disabled => true, :input_html => {:class => 'email_validation'}
- else
= user.input :email, :autofocus => true, :input_html => {:class => 'email_validation'}, :hint => 'Dies muß Ihre eigene E-Mailadresse sein!'
.details
=# user.hidden_field :id
= user.input :id
= user.input :gender, collection: [:female, :male]
= user.input :title
= user.input :firstname
= user.input :name
= user.input :faculty
= user.input :fon
= user.input :fax
Ruby 1.9.3 で Rails 3.2 です