我正在使用ruby 1.9.3和rails 4.1。
我對ruby非常陌生,沒有以前的javascripting知識。使用Rails 4和JQuery添加刪除嵌套窗體中的項目
我有一對簡單的有很多關係,一個有很多關係。
class Service < ActiveRecord::Base
has_many :websites, :dependent => :destroy
has_many :timetables, :dependent => :destroy
has_many :service_places, :dependent => :destroy
has_many :places, through: :service_places
end
class ServicePlace < ActiveRecord::Base
belongs_to :service
belongs_to :place
end
class Website < ActiveRecord::Base
belongs_to :service
end
class Place < ActiveRecord::Base
has_many :service_places
has_many :services, through: :service_places
end
class Timetable < ActiveRecord::Base
belongs_to :service
end
我已創建的服務形式(_form.html.erb)對於每個渲染罰款協會的嵌套形式,所有的CRUD功能的工作。網站的
<%= form_for(@service, :html => {:class => "form-horizontal", :role => "form"}) do |f| %>
<%= render 'wcc_style/layouts/error_messages', object: @service %>
<!-- I've skipped some of the html for the service details to just rendering the forms... -->
<!-- Adds the Service_Places associations -->
<%= f.fields_for :service_places do |service_places| %>
<%= render "service_place_fields", :f => service_places %>
<%end %>
<!-- Adds the website associations via a partial -->
<%= f.fields_for :websites do |website| %>
<%= render "website_fields", :f => website %>
<%end %>
<%= link_to_add_fields "Add a website", f, :websites, "btn btn-default", "Add a new website" %>
<!-- Adds the timetables associations via a partial -->
<%=f.fields_for :timetables do |timetable| %>
<%= render "timetable_fields", :f => timetable %>
<%end %>
<%= f.submit 'Save', :class => 'btn btn-primary' %>
<%= link_to 'Cancel', services_path, :class => "btn btn-default", :role =>"button" %>
<% end %>
例部分(_website_fields.html.erb)
<!-- This partial holds the websites information for main service form -->
<div class="form-group">
<%= f.label :website, :class=>'col-sm-2 control-label' %>
<div class="col-sm-4">
<%= f.text_field :url, :class => "form-control", :placeholder => "Service Provider Website" %>
</div>
</div>
什麼我想現在要做的是增加功能,以便能夠添加和刪除的項目(如網站,時間表, service_places)在添加\編輯服務記錄時與服務相關。我見過很多與此有關的帖子,但沒有一個使用jquery和rails 4的良好工作解決方案。
在對此做了一些研究之後,我發現了舊的軌道交通196和197.這些都過時了,並且didn在鐵軌4工作。更多的研究表明貶值的命令。我看到有一個更新版本的railscasts,我還沒有看過。我確實閱讀了修訂版的評論,並表明它使用了coffeescript,儘管我無法證實這一點。
我也看到了使用cocoon gem和nested_form_fields的其他潛在解決方案的鏈接。兩者似乎都使用我不熟悉的HAML。我試圖用jQuery來做到這一點,以幫助我更好地理解javascript過程(因爲我需要在完成時支持開發,我們的標準是儘可能使用JQuery)。
我已經設法得到添加類的工作,它在第一次按下時呈現網站標籤和複選框,但隨後的點擊只是在消失之前再次呈現此消息約一秒。這個位置並不是我期望它在頁面頂部的位置,但我相信這是我們自己的與CSS有關的造型寶石。我認爲JavaScript不應該做一個POST,這看起來是因爲它清除了每個按鈕點擊我的其他領域。
我的第一個問題是,如何在不清除服務表單中的其他項的情況下添加新項目?
我的第二個問題是如何獲得刪除功能的工作。我假設刪除必須位於部分表單生成器中(例如每個項目刪除一個)。
我已經在下面包含了應用程序助手和javascript(從各種帖子拼湊在一起)。
application_helper.rb 模塊ApplicationHelper
#def link_to_remove_fields(name, f)
# f.hidden_field(:destroy) + link_to_function(name, "remove_fields(this)")
#end
# remove link doesn't work!!!!!!!!!
def link_to_remove_fields(name, f)
f.hidden_field(:_destroy) + link_to_function(name, "remove_fields(this)")
end
# This now sort of works but the field disappears when it is created after about a second. It also appears at the top of the page.
def link_to_add_fields(name, f, association, cssClass, title)
new_object = f.object.class.reflect_on_association(association).klass.new
fields = f.fields_for(association, new_object, :child_index => "new_#{association}") do |builder|
render(association.to_s.singularize + "_fields", :f => builder)
end
link_to name, "#", :onclick => h("add_fields(this, \"#{association}\", \"#{escape_javascript(fields)}\")"), :class => cssClass, :title => title
end
end
的application.js
function remove_fields(link) {
$(link).prev("input[type=hidden]").val("1");
$(link).closest(".fields").hide();
}
function add_fields(link, association, content) {
var new_id = new Date().getTime();
var regexp = new RegExp("new_" + association, "g")
$(link).parent().before(content.replace(regexp, new_id));
}
services_controller。RB
class ServicesController < ApplicationController
# Set the service record before each action
before_action :set_service, only: [:show, :edit, :update, :destroy]
################################################################################
# Create
################################################################################
def create
@service = Service.new(service_params)
respond_to do |format|
if @service.save
format.html { redirect_to @service, notice: 'Service was successfully created.' }
format.json { render action: 'show', status: :created, location: @service }
else
@service.websites.build
@service.timetables.build
@service.service_places.build
format.html { render action: 'new' }
format.json { render json: @service.errors, status: :unprocessable_entity }
end
end
end
################################################################################
# Delete
################################################################################
def destroy
@service.destroy
respond_to do |format|
format.html { redirect_to services_url , notice: 'Service was successfully deleted.' }
format.json { head :no_content }
end
end
################################################################################
# Edit
################################################################################
def edit
@service.websites.build
@service.timetables.build
@service.service_places.build
end
################################################################################
# Index
################################################################################
def index
@services = Service.order(:service_number).page params[:page]
end
################################################################################
# New
################################################################################
def new
@service = Service.new
@service.websites.build
@service.timetables.build
@service.service_places.build
end
################################################################################
# Search
################################################################################
def search
@search_term = params[:search_term]
if @search_term && @search_term.strip.empty?
redirect_to root_path
else
@services = Service.search(@search_term).order(:service_number).page params[:page]
end
end
################################################################################
# Show
################################################################################
def show
end
################################################################################
# Update
################################################################################
def update
respond_to do |format|
if @service.update(service_params)
format.html { redirect_to @service, notice: 'Service was successfully updated.' }
format.json { head :no_content }
else
format.html { render action: 'edit' }
format.json { render json: @service.errors, status: :unprocessable_entity }
end
end
end
################################################################################
# Private methods
################################################################################
private
# Use callbacks to share common setup or constraints between actions.
def set_service
@service = Service.find(params[:id])
end
# Never trust parameters from the scary internet, only allow the white list through.
def service_params
params.require(:service).permit(:service_number, :operator, :monday, :tuesday, :wednesday, :thursday, :friday, :saturday, :sunday, :bank_holiday, :search_term, websites_attributes: [:id, :service_id, :url, :_destroy], timetables_attributes: [:id, :service_id, :url, :_destroy], service_places_attributes: [:id, :service_id, :position, :place_id, :_destroy], places_attributes: [:id, :place_name, :active, :_destroy])
end
end
走遍了互聯網,我似乎無法找到如何得到這個使用jQuery和標準紅寶石\軌工作的任何鏈接。有沒有人知道任何有助於實現這一目標的鏈接或資源?
我不反對使用寶石像繭或nested_form_fields,假設我可以將HAML轉換爲ERB和咖啡腳本爲JavaScript。作爲ruby \ rails和JavaScript的新手,有建設者在做東西是很好的,但當它出錯時,我不知道如何解決它。
我感謝任何幫助或指導。