如何在 1 个表格中包含 2 个模型？
How to Include 2 Models in 1 Form?
一个模型创建 :name, :metric (Quantified.rb)，另一个模型创建 :result_value, :result_date (Result.rb).
class Quantified < ActiveRecord::Base
belongs_to :user
scope :averaged, -> { where(categories: 'Monthly Average') }
scope :instance, -> { where(categories: 'One-Time Instance') }
has_many :results
CATEGORIES = ['Monthly Average', 'One-Time Instance']
end
class Result < ActiveRecord::Base
belongs_to :user
belongs_to :quantified
end
我需要在 _form and/or 控制器中做什么，以允许用户将他的 results_date & results_value（结果 _form）添加到相应的名称和指标（量化 _form)?
<%= form_for(@quantified) do |f| %>
<% if @quantified.errors.any? %>
<div id="error_explanation">
<h2><%= pluralize(@quantified.errors.count, "error") %> prohibited this quantified from being saved:</h2>
<ul>
<% @quantified.errors.full_messages.each do |message| %>
<li><%= message %></li>
<% end %>
</ul>
</div>
<% end %>
<div class="america">
<form>
<%= f.select :categories, Quantified::CATEGORIES %>
<br>
<br>
<div class="form-group">
<%= f.text_field :name, class: 'form-control', placeholder: 'Enter Name' %>
</div>
<div class="form-group">
<%= f.text_field :metric, class: 'form-control', placeholder: 'Enter Metric (i.e. Miles, Pounds, $, Subscribers)' %>
</div>
<div class="date-group">
<label> Date: </label>
<%= f.date_select :date, :order => [:month, :year], class: 'date-select' %>
</div>
<div class="america2">
<%= button_tag(type: 'submit', class: "btn") do %>
<span class="glyphicon glyphicon-plus"></span>
<% end %>
<%= link_to quantifieds_path, class: 'btn' do %>
<span class="glyphicon glyphicon-chevron-left"></span>
<% end %>
<%= link_to @quantified, method: :delete, data: { confirm: 'Are you sure?' }, class: 'btn' do %>
<span class="glyphicon glyphicon-trash"></span>
<% end %>
</div>
</form>
</div>
<% end %>
<%= form_for(@result) do |f| %>
<% if @result.errors.any? %>
<div id="error_explanation">
<h2><%= pluralize(@result.errors.count, "error") %> prohibited this result from being saved:</h2>
<ul>
<% @result.errors.full_messages.each do |message| %>
<li><%= message %></li>
<% end %>
</ul>
</div>
<% end %>
<div class="america">
<form>
<div class="form-group">
<%= f.text_field :result_value, class: 'form-control', placeholder: 'Enter Result' %>
</div>
<div class="date-group">
<label> Date: </label>
<%= f.date_select :result_date, :order => [:month, :year], class: 'date-select' %>
</div>
<div class="america2">
<%= button_tag(type: 'submit', class: "btn") do %>
<span class="glyphicon glyphicon-plus"></span>
<% end %>
<%= link_to results_path, class: 'btn' do %>
<span class="glyphicon glyphicon-chevron-left"></span>
<% end %>
<%= link_to @result, method: :delete, data: { confirm: 'Are you sure?' }, class: 'btn' do %>
<span class="glyphicon glyphicon-trash"></span>
<% end %>
</div>
</form>
</div>
<% end %>
例如用户输入：
:名字=运行
：公制 = 英里
然后对于此后的每个月，他都会输入该月的平均英里数 运行。如何在这两种形式之间建立关系？
:result_value = 2.1
:result_date = 一月
:result_value = 1.8
:result_date = 12 月
*每个 name/metric 有多个结果 values/dates.
控制器
class QuantifiedsController < ApplicationController
before_action :set_quantified, only: [:show, :edit, :update, :destroy]
before_action :authenticate_user!, except: [:index, :show]
def index
@averaged_quantifieds = current_user.quantifieds.averaged
@instance_quantifieds = current_user.quantifieds.instance
@results = Result.all.order("result_date")
end
def show
end
def new
@quantified = current_user.quantifieds.build
end
def edit
end
def create
@quantified = current_user.quantifieds.build(quantified_params)
if @quantified.save
redirect_to quantifieds_url, notice: 'Goal was successfully created'
else
render action: 'new'
end
end
def update
if @quantified.update(quantified_params)
redirect_to quantifieds_url, notice: 'Goal was successfully updated'
else
render action: 'edit'
end
end
def destroy
@quantified.destroy
redirect_to quantifieds_url
end
private
def set_quantified
@quantified = Quantified.find(params[:id])
end
def correct_user
@quantified = current_user.quantifieds.find_by(id: params[:id])
redirect_to quantifieds_path, notice: "Not authorized to edit this goal" if @quantified.nil?
end
def quantified_params
params.require(:quantified).permit(:categories, :name, :metric, :result, :date)
end
end
class ResultsController < ApplicationController
before_action :set_result, only: [:show, :edit, :update, :destroy]
before_action :authenticate_user!, except: [:index, :show]
def index
@results = Result.all.order("result_date")
end
def show
end
def new
@result = current_user.results.build
end
def edit
end
def create
@result = current_user.results.build(result_params)
if @result.save
redirect_to @result, notice: 'Goal was successfully created'
else
render action: 'new'
end
end
def update
if @result.update(result_params)
redirect_to @result, notice: 'Goal was successfully updated'
else
render action: 'edit'
end
end
def destroy
@result.destroy
redirect_to results_url
end
private
def set_result
@result = Result.find(params[:id])
end
def correct_user
@result = current_user.results.find_by(id: params[:id])
redirect_to results_path, notice: "Not authorized to edit this result" if @result.nil?
end
def result_params
params.require(:result).permit(:result_value, :result_date)
end
end
索引会变成这样，其中每个名称（指标）都会有多个结果和日期：
我尝试执行这些说明，但我不断收到不同变体的不同错误：http://archive.railsforum.com/viewtopic.php?id=717
我也试过这个教程：http://railscasts.com/episodes/197-nested-model-form-part-2。但它有点过时了，所以我得到了一堆错误。
在此先感谢您能给我的任何帮助！
您尝试做的是 NestedAttributes 您可以阅读更多相关信息 http://api.rubyonrails.org/classes/ActiveRecord/NestedAttributes/ClassMethods.html
示例：
# creates avatar_attributes=
accepts_nested_attributes_for :avatar, reject_if: proc { |attributes| attributes['name'].blank? }
# creates avatar_attributes=
accepts_nested_attributes_for :avatar, reject_if: :all_blank
# creates avatar_attributes= and posts_attributes=
accepts_nested_attributes_for :avatar, :posts, allow_destroy: true
这是class定义
# File activerecord/lib/active_record/nested_attributes.rb, line 301
def accepts_nested_attributes_for(*attr_names)
options = { :allow_destroy => false, :update_only => false }
options.update(attr_names.extract_options!)
options.assert_valid_keys(:allow_destroy, :reject_if, :limit, :update_only)
options[:reject_if] = REJECT_ALL_BLANK_PROC if options[:reject_if] == :all_blank
attr_names.each do |association_name|
if reflection = _reflect_on_association(association_name)
reflection.autosave = true
add_autosave_association_callbacks(reflection)
nested_attributes_options = self.nested_attributes_options.dup
nested_attributes_options[association_name.to_sym] = options
self.nested_attributes_options = nested_attributes_options
type = (reflection.collection? ? :collection : :one_to_one)
generate_association_writer(association_name, type)
else
raise ArgumentError, "No association found for name `#{association_name}'. Has it been defined yet?"
end
end
end
此外，如果您需要更多内容，rails 演员的一段非常酷的视频对此进行了解释 http://railscasts.com/episodes/196-nested-model-form-part-1
一个模型创建 :name, :metric (Quantified.rb)，另一个模型创建 :result_value, :result_date (Result.rb).
class Quantified < ActiveRecord::Base
belongs_to :user
scope :averaged, -> { where(categories: 'Monthly Average') }
scope :instance, -> { where(categories: 'One-Time Instance') }
has_many :results
CATEGORIES = ['Monthly Average', 'One-Time Instance']
end
class Result < ActiveRecord::Base
belongs_to :user
belongs_to :quantified
end
我需要在 _form and/or 控制器中做什么，以允许用户将他的 results_date & results_value（结果 _form）添加到相应的名称和指标（量化 _form)?
<%= form_for(@quantified) do |f| %>
<% if @quantified.errors.any? %>
<div id="error_explanation">
<h2><%= pluralize(@quantified.errors.count, "error") %> prohibited this quantified from being saved:</h2>
<ul>
<% @quantified.errors.full_messages.each do |message| %>
<li><%= message %></li>
<% end %>
</ul>
</div>
<% end %>
<div class="america">
<form>
<%= f.select :categories, Quantified::CATEGORIES %>
<br>
<br>
<div class="form-group">
<%= f.text_field :name, class: 'form-control', placeholder: 'Enter Name' %>
</div>
<div class="form-group">
<%= f.text_field :metric, class: 'form-control', placeholder: 'Enter Metric (i.e. Miles, Pounds, $, Subscribers)' %>
</div>
<div class="date-group">
<label> Date: </label>
<%= f.date_select :date, :order => [:month, :year], class: 'date-select' %>
</div>
<div class="america2">
<%= button_tag(type: 'submit', class: "btn") do %>
<span class="glyphicon glyphicon-plus"></span>
<% end %>
<%= link_to quantifieds_path, class: 'btn' do %>
<span class="glyphicon glyphicon-chevron-left"></span>
<% end %>
<%= link_to @quantified, method: :delete, data: { confirm: 'Are you sure?' }, class: 'btn' do %>
<span class="glyphicon glyphicon-trash"></span>
<% end %>
</div>
</form>
</div>
<% end %>
<%= form_for(@result) do |f| %>
<% if @result.errors.any? %>
<div id="error_explanation">
<h2><%= pluralize(@result.errors.count, "error") %> prohibited this result from being saved:</h2>
<ul>
<% @result.errors.full_messages.each do |message| %>
<li><%= message %></li>
<% end %>
</ul>
</div>
<% end %>
<div class="america">
<form>
<div class="form-group">
<%= f.text_field :result_value, class: 'form-control', placeholder: 'Enter Result' %>
</div>
<div class="date-group">
<label> Date: </label>
<%= f.date_select :result_date, :order => [:month, :year], class: 'date-select' %>
</div>
<div class="america2">
<%= button_tag(type: 'submit', class: "btn") do %>
<span class="glyphicon glyphicon-plus"></span>
<% end %>
<%= link_to results_path, class: 'btn' do %>
<span class="glyphicon glyphicon-chevron-left"></span>
<% end %>
<%= link_to @result, method: :delete, data: { confirm: 'Are you sure?' }, class: 'btn' do %>
<span class="glyphicon glyphicon-trash"></span>
<% end %>
</div>
</form>
</div>
<% end %>
例如用户输入：
:名字=运行
：公制 = 英里
然后对于此后的每个月，他都会输入该月的平均英里数 运行。如何在这两种形式之间建立关系？
:result_value = 2.1
:result_date = 一月
:result_value = 1.8
:result_date = 12 月
*每个 name/metric 有多个结果 values/dates.
控制器
class QuantifiedsController < ApplicationController
before_action :set_quantified, only: [:show, :edit, :update, :destroy]
before_action :authenticate_user!, except: [:index, :show]
def index
@averaged_quantifieds = current_user.quantifieds.averaged
@instance_quantifieds = current_user.quantifieds.instance
@results = Result.all.order("result_date")
end
def show
end
def new
@quantified = current_user.quantifieds.build
end
def edit
end
def create
@quantified = current_user.quantifieds.build(quantified_params)
if @quantified.save
redirect_to quantifieds_url, notice: 'Goal was successfully created'
else
render action: 'new'
end
end
def update
if @quantified.update(quantified_params)
redirect_to quantifieds_url, notice: 'Goal was successfully updated'
else
render action: 'edit'
end
end
def destroy
@quantified.destroy
redirect_to quantifieds_url
end
private
def set_quantified
@quantified = Quantified.find(params[:id])
end
def correct_user
@quantified = current_user.quantifieds.find_by(id: params[:id])
redirect_to quantifieds_path, notice: "Not authorized to edit this goal" if @quantified.nil?
end
def quantified_params
params.require(:quantified).permit(:categories, :name, :metric, :result, :date)
end
end
class ResultsController < ApplicationController
before_action :set_result, only: [:show, :edit, :update, :destroy]
before_action :authenticate_user!, except: [:index, :show]
def index
@results = Result.all.order("result_date")
end
def show
end
def new
@result = current_user.results.build
end
def edit
end
def create
@result = current_user.results.build(result_params)
if @result.save
redirect_to @result, notice: 'Goal was successfully created'
else
render action: 'new'
end
end
def update
if @result.update(result_params)
redirect_to @result, notice: 'Goal was successfully updated'
else
render action: 'edit'
end
end
def destroy
@result.destroy
redirect_to results_url
end
private
def set_result
@result = Result.find(params[:id])
end
def correct_user
@result = current_user.results.find_by(id: params[:id])
redirect_to results_path, notice: "Not authorized to edit this result" if @result.nil?
end
def result_params
params.require(:result).permit(:result_value, :result_date)
end
end
索引会变成这样，其中每个名称（指标）都会有多个结果和日期：
我尝试执行这些说明，但我不断收到不同变体的不同错误：http://archive.railsforum.com/viewtopic.php?id=717
我也试过这个教程：http://railscasts.com/episodes/197-nested-model-form-part-2。但它有点过时了，所以我得到了一堆错误。
在此先感谢您能给我的任何帮助！
您尝试做的是 NestedAttributes 您可以阅读更多相关信息 http://api.rubyonrails.org/classes/ActiveRecord/NestedAttributes/ClassMethods.html
示例：
# creates avatar_attributes=
accepts_nested_attributes_for :avatar, reject_if: proc { |attributes| attributes['name'].blank? }
# creates avatar_attributes=
accepts_nested_attributes_for :avatar, reject_if: :all_blank
# creates avatar_attributes= and posts_attributes=
accepts_nested_attributes_for :avatar, :posts, allow_destroy: true
这是class定义
# File activerecord/lib/active_record/nested_attributes.rb, line 301
def accepts_nested_attributes_for(*attr_names)
options = { :allow_destroy => false, :update_only => false }
options.update(attr_names.extract_options!)
options.assert_valid_keys(:allow_destroy, :reject_if, :limit, :update_only)
options[:reject_if] = REJECT_ALL_BLANK_PROC if options[:reject_if] == :all_blank
attr_names.each do |association_name|
if reflection = _reflect_on_association(association_name)
reflection.autosave = true
add_autosave_association_callbacks(reflection)
nested_attributes_options = self.nested_attributes_options.dup
nested_attributes_options[association_name.to_sym] = options
self.nested_attributes_options = nested_attributes_options
type = (reflection.collection? ? :collection : :one_to_one)
generate_association_writer(association_name, type)
else
raise ArgumentError, "No association found for name `#{association_name}'. Has it been defined yet?"
end
end
end
此外，如果您需要更多内容，rails 演员的一段非常酷的视频对此进行了解释 http://railscasts.com/episodes/196-nested-model-form-part-1