"如果能一次做好，那麼就一次做好"

這邊要做一個 Form Object，使其送一次的 submit ，而達到兩個 model 的更新
在 girb 裡，會有 name, like, email, level_cd，這樣的欄位需要維護
我們新建一個 model 名稱訂為 xfile ，要維護的欄位為 character
最終的目的就是想要 name, like, email, level_cd, character 這5個欄位一起維護
首先來產生 model
以及讓這兩個 model 有所關聯
之前已經先建了 girb 這個 model
現在再產生一個 model 為 xfile，並開一個欄位 girb_id 及 character
藉由欄位 girb_id，這個 model xfile 能和 model girb 有所關連

rails g model xfile girb_id:integer character:string





rake db:migrate





annotate





app/models/girb.rb

# == Schema Information
#
# Table name: girbs
#
#  id         :integer          not null, primary key
#  name       :string(255)
#  created_at :datetime
#  updated_at :datetime
#  like       :integer          default(0)
#  email      :string(255)
#  level_cd   :integer
#

class Girb < ActiveRecord::Base
  has_many :bangs, dependent: :destroy
  has_many :comments, dependent: :destroy
  has_one :xfile

  as_enum :level, dead: 0, successful: 1, famous: 2, working: 3, average: 4, amateur: 5, unknown: 6, bad: 7

  def self.search(query)
    where("name like ?", "%#{query}%")
  end

end





app/models/xfile.rb

# == Schema Information
#
# Table name: xfiles
#
#  id         :integer          not null, primary key
#  girb_id    :integer
#  character  :string(255)
#  created_at :datetime
#  updated_at :datetime
#

class Xfile < ActiveRecord::Base
    belongs_to :girb
end

新增一個 app/models/girb_update_form.rb

app/models/girb_update_form.rb

class GirbUpdateForm
  include ActiveModel::Model

  attr_reader :girb
  attr_reader :xfile

  attr_accessor :name          # from girb
  attr_accessor :like          # from girb
  attr_accessor :email         # from girb
  attr_accessor :level_cd      # from girb
  attr_accessor :character     # from xfile

  validates_presence_of :email, :name, :like, :level_cd
  validates_presence_of :character

  def initialize(girb_id)
    @girb    = Girb.find_by_id(girb_id)
    @xfile   = @girb.xfile || @girb.build_xfile
    self.email      = @girb.email
    self.name       = @girb.name
    self.like       = @girb.like
    self.level_cd   = @girb.level_cd
    self.character  = @xfile.character
  end

  def persisted?
    @girb.persisted? && @xfile.persisted?
  end

  def update(params)
    self.email    = params[:email]
    self.name = params[:name]
    self.like      = params[:like]
    self.level_cd      = params[:level_cd]
    self.character      = params[:character]
    if valid?
      @girb.update_attributes(email: email, name: name, like: like, level_cd: level_cd)
      @xfile.update_attributes(character: character)
      true
    else
      false
    end
  end
end





app/controllers/girbs_controller.rb

class GirbsController < ApplicationController

  @@get_level_cd = -1
  @@get_search = ""
  before_action :has_level, :has_search

  def index
    if @@get_search != ""
      if params[:tab].present?
        @girbs = Girb.search(@@get_search).order("name #{params[:tab]}").paginate(page: params[:page], per_page: 12)
      else
        @girbs = Girb.search(@@get_search).paginate(page: params[:page], per_page: 12)
      end
    else
      if params[:level_cd].present?
        @girbs = Girb.all.where(level_cd: @@get_level_cd).paginate(page: params[:page], per_page: 12)
      else
        if params[:tab].present?
          @girbs = Girb.all.where(level_cd: @@get_level_cd).order("name #{params[:tab]}").paginate(page: params[:page], per_page: 12)
        else
          @girbs = Girb.all.paginate(page: params[:page], per_page: 12)
        end
      end
    end
  end


  # def index
  #   @tab = if %w(asc desc).include?(params[:tab]) then params[:tab] else :asc end
  #   @girbs = Girb.level_list(params[:level_cd]).search(params[:search]).order(name: @tab)
  # end


  def like_asc
    @at_like = false
    @girbs = Girb.all.order("like ASC").paginate(page: params[:page], per_page: 12)
    render :index
  end

  def like_desc
    @at_like = true
    @girbs = Girb.all.order("like DESC").paginate(page: params[:page], per_page: 12)
    render :index
  end

  def like
    @girb = Girb.find(params[:id])
    @girb.like += 1;
    @girb.save
    # redirect_to(girbs_path)
    redirect_to :back
  end

  def on_click_bang
    @girb = Girb.find(params[:id])
    @girb.bangs.create
    # redirect_to(girbs_path)
    redirect_to :back
  end

  def new
    @girb = Girb.new
  end

  def create
    @girb = Girb.new(girb_params)
    if @girb.save
      redirect_to(girbs_path)
    else
      render :new
    end
  end

  def show
    @girb = Girb.find(params[:id])
    # @comment = @girb.comments.build
  end

  def edit
    # @girb = Girb.find(params[:id])
    @girb_update_form = GirbUpdateForm.new(params[:id])
  end

  def update
    # @girb = Girb.find(params[:id])

    @girb_update_form = GirbUpdateForm.new(params[:id])
    # if @girb.update(girb_params)
    if @girb_update_form.update(girb_params)
      redirect_to girbs_path
    else
      render :edit
    end
  end

  def destroy
    @girb = Girb.find(params[:id])
    @girb.destroy
    redirect_to girbs_path
  end

  private

  def girb_params
    # params.require(:girb).permit(:name, :email, :like, :level_cd)
    params.require(:girb_update_form).permit(:name, :email, :like, :level_cd, :character)
  end

  def has_level
    if params[:level_cd].present?
      if(nil != params[:level_cd].present?)
        @@get_level_cd = params[:level_cd]
        @@get_search = ""
      end
    end
    @@get_level_cd
  end

  def has_search
    if params[:search].present?
      if(nil != params[:search].present?)
        @@get_search = params[:search]
        @@get_level_cd = -1
      end
    end
    @@get_search
  end

end





app/views/girbs/new.html.erb

<div class="container">
  <%= form_for(@girb_update_form, url: girb_path(@girb_update_form.girb), :html => {:class => "form-horizontal center"}) do |f| %>
  <div class="form-group">
    <%= f.label :name, "Name:", class: "col-md-3 control-label" %>
    <div class="col-md-7">
      <%= f.text_field :name, class: "form-control" %>
    </div>
  </div>
  <div class="form-group">
    <%= f.label :email, "Email:", class: "col-md-3 control-label" %>
    <div class="col-md-7">
      <%= f.text_field :email, class: "form-control" %>
    </div>
  </div>
  <div class="form-group">
    <%= f.label :level, "Level:", class: "col-md-3 control-label" %>
    <div class="col-md-7">
      <%= f.collection_select :level_cd, Girb.all.select(:level_cd).distinct, :level_cd, :level, include_blank: false %>
    </div>
  </div>
  <div class="form-group">
    <%= f.label :like, "Like:", class: "col-md-3 control-label" %>
    <div class="col-md-7">
      <%= f.number_field :like, class: "form-control" %>
    </div>
  </div>


    <div class="form-group">
    <%= f.label :character, "Character:", class: "col-md-3 control-label" %>
    <div class="col-md-7">
      <%= f.text_field :character, class: "form-control" %>
    </div>
  </div>

  <div class="form-group">
    <div class="col-md-3 control-label">
    </div>
    <div class="col-md-7">
      <%= f.submit "Submit", class: "btn btn-default btn-primary" %>
    </div>
  </div>
  <% end %>
</div>