从显示页面复制 Rails 中的条目

本文介绍了从显示页面复制 Rails 中的条目的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！

问题描述

从 show.html.erb 页面我想在该页面上创建记录的副本并将其发送到 new.html.erb 页面.Rails dup 方法可以做到这一点(并且没有 ID 或创建日期)，但我不知道如何到达那里.

我目前遇到的错误是:无法找到带有id"= 的 Street 指向 @street = Street.find(params[:id]).streets_controller.rb 中的 dup 行.(此页面已更新，修复了我遇到的一些问题.谢谢评论者.)

我的 show.edit.erb 页面的一部分:

<strong>以前的街道名称:</strong><%[email protected]_name %></p><p><strong>&lsquo;当前/下一个&rsquo;街道名称:</strong><%[email protected]_name %></p><p><strong>&lsquo;上一个&rsquo的最早日期名称:<%[email protected]_earliest %></p><p><strong>最新日期为&lsquo;上一个&rsquo;名称:&nbsp;&nbsp;</strong><%[email protected]_latest %></p><p><strong>条目涵盖从十字路口到十字路口或类似的:</strong><%[email protected]_streets %></p><p><strong>大概的块数:</strong><%[email protected]_of_blocks %></p><p><strong>段的长度:</strong><%[email protected]_length.round(2)%>英里</p>

然后是同一页面上的一些按钮:

<button type="button" class="btn btn-outline-primary" ><%= link_to 'New Historic Street Entry', new_street_path %><%= link_to 'Duplicate This Entry', dup_street_path, :action =>"dup", :id =>@street.id, class: "btn btn-outline-primary" %>

最后一个按钮是我完成重复的第一次尝试.现在的问题是传递 id.

在streets_controller.rb

def dup@street = Street.find(params[:id]).dup渲染:新结尾

我终于找到了路线:get 'dup_street', to: 'streets#dup'

为了完整性:new.html.erb

<% provide(:title, '新的历史街道名称') %><%= 渲染 'form_edit'，街道:@street %><br/><div class="btn btn-primary active"><%= link_to '到街道列表'，street_path %>

<p>这是从以前的名称/最早日期到当前名称/最新日期的街道名称</p><div class="row"><div class="col-4"><%= form_with(model: street, local: true) 做 |form|％＞<% if street.errors.any?％＞<div id="error_explanation"><h2><%=pluralize(street.errors.count, "error") %>禁止保存这条街道:</h2><ul><% street.errors.full_messages.each do |message|％＞<li><%=消息%></li><%结束%> <%结束%><div class="form-inputs"><div class="field"><%= form.label "City" %><%= form.text_field :city, id: :street_city %>

请求信息请求参数:{"controller"=>"streets", "action"=>"dup"}机架会话:(对象太大.修改 ActionDispatch::Request::Session#inspect 或增加 BetterErrors.maximum_variable_inspect_size)局部变量:<blank>实例变量:@_action_has_layout: 真@_routes:无@_request: (对象太大.修改ActionDispatch::Request#inspect或增加BetterErrors.maximum_variable_inspect_size)@_response: (对象太大.修改ActionDispatch::Response#inspect或增加BetterErrors.maximum_variable_inspect_size)@_lookup_context: #<ActionView::LookupContext:0x00007fc0be919408 @details_key=nil, @cache=true, @prefixes=["streets", "application"], @rendered_format=nil, @details={:locale=>[:en], :formats=>[:html], :variants=>[], :handlers=>[:raw, :erb, :html, :builder, :ruby, :jbuilder]}, @view_paths=#<ActionView::PathSet:0x00007fc0be919318 @paths=[#<ActionView::OptimizedFileSystemResolver:0x00007fc0bb607358 @pattern=":prefix/:action{.:locale,}{.:formats,}{+:variants,}{.:handlers,}", @cache=#<ActionView::Resolver::Cache:0x7fc0bb607330 keys=10 queries=0>, @path="/Users/gscar/Documents/Croatian Restaurants Project-CroRes/LA Historical街道名称/la_hist_street/app/views">]>>@_action_name:重复"@_response_body:无@marked_for_same_origin_verification: true@_config:{}@current_user: #<User id: 4, name: "Example User", email: "[email protected]", created_at: "2017-06-09 23:06:24", updated_at: "2017-06-09 23:06:24", password_digest: <一堆数字>", remember_digest: nil, admin: true, activation_digest: "$2a$10...",activated: true,activated_at: "2017-06-09 23:06:24", reset_digest: nil, reset_sent_at: nil>@_params:<ActionController::Parameters {"controller"=>"streets", "action"=>"dup"} 允许:false>

<p> <strong>Previous Street Name:</strong> <%= @street.previous_name %> </p> <p> <strong>‘Current/Next’ Street Name:</strong> <%= @street.current_name %> </p> <p> <strong>Earliest Date for ‘Previous’ Name:</strong> <%= @street.date_earliest %> </p> <p> <strong>Latest Date for ‘Previous’ Name:  </strong> <%= @street.date_latest %> </p> <p> <strong>Entry covers from cross street to cross street or similar:</strong> <%= @street.cross_streets %> </p> <p> <strong>Approximate Number of Blocks:</strong> <%= @street.number_of_blocks %> </p> <p> <strong>Length of segment:</strong> <%= @street.extent_length.round(2) %> miles </p>

<button type="button" class="btn btn-outline-primary" > <%= link_to 'Edit', edit_street_path(@street) %> </button> <button type="button" class="btn btn-outline-primary" > <%= link_to 'New Historic Street Entry', new_street_path %> </button> <%= link_to 'Duplicate This Entry', dup_street_path, :action => "dup", :id => @street.id, class: "btn btn-outline-primary" %>

<p id="notice"><%= notice %></p> <% provide(:title, 'New Historic Street Name') %> <%= render 'form_edit', street: @street %> <br/> <div class="btn btn-primary active"> <%= link_to 'To List of Streets', streets_path %> </div> <%= link_to 'Duplicate This Entry', dup_street_path, :action => "dup", :id => @street.id, class: "btn btn-outline-primary" %>

<div class="container-fluid"> <p>This is for a street name from Previous Name/Earliest Date to Current Name/Latest Date</p> <div class="row">  <div class="col-4">  <%= form_with(model: street, local: true) do |form| %> <% if street.errors.any? %> <div id="error_explanation"> <h2><%= pluralize(street.errors.count, "error") %> prohibited this street from being saved:</h2> <ul> <% street.errors.full_messages.each do |message| %> <li><%= message %></li> <% end %> </ul> </div> <% end %> <div class="form-inputs"> <div class="field"> <%= form.label "City" %> <%= form.text_field :city, id: :street_city %> </div> <div class="field"> <%= form.label "Previous Name" %> <%= form.text_field :previous_name, id: :street_previous_name %> </div> <div class="field"> <%= form.label "Current Street Name" %> <%= form.text_field :current_name, id: :street_current_name, placeholder: "Name at end of period (Latest confirmed date)", :size=>"95%" %> </div> <div class="row"> <div class="col-lg-12 text-center font-bold">For Previous Street Name</div> <div class="field col-lg-6"> <%= form.label "Earliest Confirmed Date" %> <%= form.text_field :date_earliest, id: :street_date_earliest %> </div> <div class="field col"> <%= form.label "Latest Confirmed Date" %> <%= form.text_field :date_latest, id: :street_date_latest %> </div> </div> <div class="field"> <%= form.label "Entry covers from cross street to cross street or similar" %> <%= form.text_area :cross_streets, id: :street_cross_streets, :maxlength=>"100%" %> </div> <div class="row"> <div class="col-lg-12 text-center font-bold">Extent of This Item</div> <div class="field col-lg-6"> <%= form.label "Approximate Number of Blocks" %> <%= form.text_field :number_of_blocks, id: :street_number_of_blocks %> </div> <div class="field col"> <%= form.label "Length of segment, miles" %> <%= form.text_field :extent_length, id: :street_extent_length %> </div> </div> <div class="field"> <%= form.label "Reference 1" %> <%= form.text_area :ref1, id: :street_ref1, :maxlength=>"95%" %> </div> <div class="field"> <%= form.label "Reference 2" %> <%= form.text_area :ref2, id: :street_ref2 %> </div> <div class="field"> <%= form.label "Reference 3" %> <%= form.text_area :ref3, id: :street_ref3 %> </div> <div class="field"> <%= form.label :notes %> <%= form.text_area :notes, id: :street_notes %> </div> <div class="field"> <%= form.label "Extent as JSON [lng lat]" %> <%= form.text_field :extent_json, id: :street_extent_json, placeholder: "Will be automagically filled in when line is drawn!" %> </div> <% if @street.extent_array? %> <div class="field"> <%= form.label "Extend as string (array lat lng)This column is replaced by the one above and will be removed." %> <%= form.text_area :extent_array, id: :street_extent_array, placeholder: "Not currently being used except for pre-existing entries." %> </div> <% end %> <div class="actions"> <%= form.submit "Create/Update Historical Street", class: "btn btn-primary" %> </div> </div>  <% end %>  </div>   <%= render 'map_and_control_and_draw' %>  <%= render 'overlaymap_selector' %>  </div>  </div>

Request info Request parameters: {"controller"=>"streets", "action"=>"dup"} Rack session: (object too large. Modify ActionDispatch::Request::Session#inspect or increase BetterErrors.maximum_variable_inspect_size) Local Variables: <blank> Instance Variables: @_action_has_layout: true @_routes: nil @_request: (object too large. Modify ActionDispatch::Request#inspect or increase BetterErrors.maximum_variable_inspect_size) @_response: (object too large. Modify ActionDispatch::Response#inspect or increase BetterErrors.maximum_variable_inspect_size) @_lookup_context: #<ActionView::LookupContext:0x00007fc0be919408 @details_key=nil, @cache=true, @prefixes=["streets", "application"], @rendered_format=nil, @details={:locale=>[:en], :formats=>[:html], :variants=>[], :handlers=>[:raw, :erb, :html, :builder, :ruby, :jbuilder]}, @view_paths=#<ActionView::PathSet:0x00007fc0be919318 @paths=[#<ActionView::OptimizedFileSystemResolver:0x00007fc0bb607358 @pattern=":prefix/:action{.:locale,}{.:formats,}{+:variants,}{.:handlers,}", @cache=#<ActionView::Resolver::Cache:0x7fc0bb607330 keys=10 queries=0>, @path="/Users/gscar/Documents/Croatian Restaurants Project-CroRes/LA Historical Street Names/la_hist_street/app/views">]>> @_action_name: "dup" @_response_body: nil @marked_for_same_origin_verification: true @_config: {} @current_user: #<User id: 4, name: "Example User", email: "[email protected]", created_at: "2017-06-09 23:06:24", updated_at: "2017-06-09 23:06:24", password_digest: <bunch of numbers>", remember_digest: nil, admin: true, activation_digest: "$2a$10...", activated: true, activated_at: "2017-06-09 23:06:24", reset_digest: nil, reset_sent_at: nil> @_params: <ActionController::Parameters {"controller"=>"streets", "action"=>"dup"} permitted: false>