2014-10-01 40 views
4

我正在使用ruby 1.9.3和rails 4.1。
我对ruby非常陌生,没有以前的javascripting知识。使用Rails 4和JQuery添加删除嵌套窗体中的项目

我有一对简单的有很多关系,一个有很多关系。

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 

我已创建的服务形式(_form.html.erb)对于每个渲染罚款协会的嵌套形式,所有的CRUD功能的工作。网站的

<%= 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> 

什么我想现在要做的是增加功能,以便能够添加和删除的项目(如网站,时间表, service_places)在添加\编辑服务记录时与服务相关。我见过很多与此有关的帖子,但没有一个使用jquery和rails 4的良好工作解决方案。

在对此做了一些研究之后,我发现了旧的轨道交通196和197.这些都过时了,并且didn在铁轨4工作。更多的研究表明贬值的命令。我看到有一个更新版本的railscasts,我还没有看过。我确实阅读了修订版的评论,并表明它使用了coffeescript,尽管我无法证实这一点。

我也看到了使用cocoon gem和nested_form_fields的其他潜在解决方案的链接。两者似乎都使用我不熟悉的HAML。我试图用jQuery来做到这一点,以帮助我更好地理解javascript过程(因为我需要在完成时支持开发,我们的标准是尽可能使用JQuery)。

我已经设法得到添加类的工作,它在第一次按下时呈现网站标签和复选框,但随后的点击只是在消失之前再次呈现此消息约一秒。这个位置并不是我期望它在页面顶部的位置,但我相信这是我们自己的与CSS有关的造型宝石。我认为JavaScript不应该做一个POST,这看起来是因为它清除了每个按钮点击我的其他领域。

我的第一个问题是,如何在不清除服务表单中的其他项的情况下添加新项目?

我的第二个问题是如何获得删除功能的工作。我假设删除必须位于部分表单生成器中(例如每个项目删除一个)。

我已经在下面包含了应用程序助手和javascript(从各种帖子拼凑在一起)。

application_helper.rb 模块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 

走遍了互联网,我似乎无法找到如何得到这个使用jQuery和标准红宝石\轨工作的任何链接。有没有人知道任何有助于实现这一目标的链接或资源?

我不反对使用宝石像茧或nested_form_fields,假设我可以将HAML转换为ERB和咖啡脚本为JavaScript。作为ruby \ rails和JavaScript的新手,有建设者在做东西是很好的,但当它出错时,我不知道如何解决它。

我感谢任何帮助或指导。

回答

4

没有得到任何快速我跟进了一位同事的建议使用茧。我按照这里的步骤:cocoon gem on github并设法让它工作。我知道这并不能回答我的实际问题,但它确实为我提供了一种做我想做的事情的方法。我注意到其他人的步骤,以防他们发现它有用。我也将HAML转换为普通红宝石,因为我对此更加舒服。

1)添加下面一行到你的Gemfile:

gem "cocoon" 

2)下方添加行到您的应用程序/资产/ Java脚本/ application.js中文件

//= require cocoon 

3)修改了我的服务表格(_form.html.erb)如下

<%= form_for(@service, :html => {:class => "form-horizontal", :role => "form"}) do |f| %> 

    <%= render 'wcc_style/layouts/error_messages', object: @service %> 

    <div class="form-group"> 
    <%= f.label :service_number, :class=>'col-sm-2 control-label' %> 
    <div class="col-sm-3"> 
     <%= f.text_field :service_number, :class => "form-control", :placeholder => "Service Number" %> 
    </div> 
    </div> 

    <div class="form-group"> 
    <%= f.label :operator, :class=>'col-sm-2 control-label' %> 
    <div class="col-sm-4"> 
     <%= f.text_field :operator, :class => "form-control", :placeholder => "Operator" %> 
    </div> 
    </div> 

    <div class="form-group"> 
    <%= f.label :monday, :class=>'col-sm-2 control-label' %> 
    <div class="col-sm-2"> 
     <%= f.check_box :monday, :class => "form-control, pull-left", :placeholder => "Monday" %> 
    </div> 
    </div> 

    <div class="form-group"> 
    <%= f.label :tuesday, :class=>'col-sm-2 control-label' %> 
    <div class="col-sm-2"> 
     <%= f.check_box :tuesday, :class => "form-control, pull-left", :placeholder => "Tuesday" %> 
    </div> 
    </div> 

    <div class="form-group"> 
    <%= f.label :wednesday, :class=>'col-sm-2 control-label' %> 
    <div class="col-sm-2"> 
     <%= f.check_box :wednesday, :class => "form-control, pull-left", :placeholder => "Wednesday" %> 
    </div> 
    </div> 

    <div class="form-group"> 
    <%= f.label :thursday, :class=>'col-sm-2 control-label' %> 
    <div class="col-sm-2"> 
     <%= f.check_box :thursday, :class => "form-control, pull-left", :placeholder => "thursday" %> 
    </div> 
    </div> 

    <div class="form-group"> 
    <%= f.label :friday, :class=>'col-sm-2 control-label' %> 
    <div class="col-sm-2"> 
     <%= f.check_box :friday, :class => "form-control, pull-left", :placeholder => "Friday" %> 
    </div> 
    </div> 

    <div class="form-group"> 
    <%= f.label :saturday, :class=>'col-sm-2 control-label' %> 
    <div class="col-sm-2"> 
     <%= f.check_box :saturday, :class => "form-control, pull-left", :placeholder => "Saturday" %> 
    </div> 
    </div> 

    <div class="form-group"> 
    <%= f.label :sunday, :class=>'col-sm-2 control-label' %> 
    <div class="col-sm-2"> 
     <%= f.check_box :sunday, :class => "form-control, pull-left", :placeholder => "Sunday" %> 
    </div> 
    </div> 

    <div class="form-group"> 
    <%= f.label :bank_holiday, :class=>'col-sm-2 control-label' %> 
    <div class="col-sm-2"> 
     <%= f.check_box :bank_holiday, :class => "form-control, pull-left", :placeholder => "Bank Holiday" %> 
    </div> 
    </div> 

<h3>Stops</h3> 

    <!-- Adds the Service_Places associations via partial (sort applied in model) --> 
    <div> 
    <%= f.fields_for :service_places do |service_places| %> 
     <%= render 'service_place_fields', :f => service_places %> 
    <% end %> 
    <div class="links"> 
     <%= link_to_add_association 'add service places', f, :service_places, :class => "btn btn-default" %> 
    </div> 
    </div> 


<h3>Websites</h3> 

    <!-- Adds the website associations via a partial --> 
    <div> 
    <%= f.fields_for :websites do |website| %> 
     <%= render "website_fields", :f => website %> 
    <%end %> 
    <div class="links"> 
     <%= link_to_add_association 'add websites', f, :websites, :class => "btn btn-default" %> 
    </div> 
    </div> 

<h3>Timetables</h3> 

    <!-- Adds the timetables associations via a partial --> 
    <div> 
    <%=f.fields_for :timetables do |timetable| %> 
     <%= render "timetable_fields", :f => timetable %> 
    <%end %> 
    <div class="links"> 
     <%= link_to_add_association 'add timetables', f, :timetables, :class => "btn btn-default" %> 
    </div> 
    </div> 

    <br> 

    <%= f.submit 'Save', :class => 'btn btn-primary' %> 
    <%= link_to 'Cancel', services_path, :class => "btn btn-default", :role =>"button" %> 

<% end %> 

4)修改了部分内容,如下所示。它需要class =“嵌套字段”,否则它将无法工作。

<div class="nested-fields"> 

    <%= 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> 
    <%= link_to_remove_association "remove website", f, :class => "btn btn-default" %> 
    </div> 

</div> 

我没有包括我所有的部分,但他们遵循相同的格式。