问题描述
嘿，我要在Rails 4 Ruby 2.2中构建一个CAD应用程序；
Hey all I'm building out a CAD App in Rails 4 Ruby 2.2;
在我的通话表单中，我有一个框，允许调度员选择最多4个单位发送呼叫。 （有关布局，请参见下文）。
in my Calls form I have a box that allows the dispatcher to select up to 4 units to send to a call. (see below for layout).
这个问题的简短之处是找出如何保存和访问在Users模型和存储中可以找到的4个独立的user_id。它们在呼叫模型中，以便可以链接并显示在我的Show.html.erb中，分别作为1-4单元（如果需要所有这些单元）
The Short and Narrow of this question is to find out how to save and access 4 independent user_id's that would be found in the Users model and store them in the Calls model so they can be linked and displayed in my Show.html.erb as respective units 1-4 (if all those units are required)
这是以下形式：
<%= form_for(@call) do |f| %>
<div class="panel panel-success" id="responding-box">
<div class="panel-heading"><center><h4>Units Responding</h4></center></div>
<table class="table">
<thead>
<tr>
<th><center>Unit #1</center></th>
<th><center>Time On Scene</center></th>
<th><center>Time Clear</center></th>
</tr>
</thead>
<tbody>
<tr>
<td><center><%= f.collection_select(:unit_1, User.all, :id, :employee_ident, {}, { :multiple => true } ) %></center></td>
<td><center><%= f.time_select :unit_on_scene %></center></td>
<td><center><%= f.time_select :unit_clear %></center></td>
</tr>
</tbody>
</table>
<br>
<table class="table">
<thead>
<tr>
<th><center>Unit #2</center></th>
<th><center>Time On Scene</center></th>
<th><center>Time Clear</center></th>
</tr>
</thead>
<tbody>
<tr>
<td><center><%= f.collection_select(:unit_2, User.all, :id, :employee_ident, {}, { :multiple => false } ) %></center></td>
<td><center><%= f.time_select :unit2_os %></center></td>
<td><center><%= f.time_select :unit2_cl %></center></td>
</tr>
</tbody>
</table>
<br>
<table class="table">
<thead>
<tr>
<th><center>Unit #3</center></th>
<th><center>Time On Scene</center></th>
<th><center>Time Clear</center></th>
</tr>
</thead>
<tbody>
<tr>
<td><center><%= f.collection_select(:unit_3, User.all, :id, :employee_ident, {}, { :multiple => false } ) %></center></td>
<td><center><%= f.time_select :unit3_os %></center></td>
<td><center><%= f.time_select :unit3_cl %></center></td>
</tr>
</tbody>
</table>
<br>
<table class="table">
<thead>
<tr>
<th><center>Unit #4</center></th>
<th><center>Time On Scene</center></th>
<th><center>Time Clear</center></th>
</tr>
</thead>
<tbody>
<tr>
<td><center><%= f.collection_select(:unit_4, User.all, :id, :employee_ident, {}, { :multiple => false } ) %></center></td>
<td><center><%= f.time_select :unit4_os %></center></td>
<td><center><%= f.time_select :unit4_cl %></center></td>
</tr>
</tbody>
</table>
</div>
</div>
<% end %>
我最初将其作为我的收藏集选择代码：
I originally had this as my collection_select code:
<td><center><%= f.collection_select(:call, :user_id, User.all, :id, :employee_ident, {}, { :multiple => true } ) %></center></td>
这仅更新了user_id，而不更新unit_1,2,3,4，如下所示。
This only updated the user_id and not unit_1,2,3,4 as displayed below.
使用当前collection_select，它将更新我已通过Rails Console验证的Postgresql数据库中的用户号（见下文）
With the current collection_select, it updates the user number in the Postgresql DB which i have verified through Rails Console (see below)
Rails控制台输出：
unit_1: "1", unit_2: "2", unit_3: "3", unit_4: "1", user_id: "1"
问题这是所有4个单位的用户ID都不相等。当我尝试在显示页面上连接以显示每个employee_ident编号时，仅显示user_id： 1。为了显示此内容，我在Show.html.erb
The problem here is that is dose not refrence the user_id for all 4 units. and only displays user_id: "1" when I try to connect it on the display page to show each employee_ident number. To display this I am using the following in my Show.html.erb
<td><center><%= @call.user.employee_ident %></center></td>
当我使用上面的代码时，当我需要它返回user_id的employee_ident： 1时每个所选选项的每个employee_ident。
when I use the above it returns the employee_ident of user_id: "1" when I need it to return each employee_ident for each of the selected options.
这是我的显示页面：
<div class="panel panel-success" id="responding-box">
<div class="panel-heading"><center><h4>Units Responding</h4></center></div>
<table class="table">
<thead>
<tr>
<th><center>Unit #1</center></th>
<th><center>Time On Scene</center></th>
<th><center>Time Clear</center></th>
</tr>
</thead>
<tbody>
<tr>
<td><center><%= @call.user.employee_ident %></center></td>
<td><center><%= @call.unit_on_scene.strftime("%H:%m") %></center></td>
<td><center><%= @call.unit_clear.strftime("%H:%m") %></center></td>
</tr>
</tbody>
</table>
<br>
<table class="table">
<thead>
<tr>
<th><center>Unit #2</center></th>
<th><center>Time On Scene</center></th>
<th><center>Time Clear</center></th>
</tr>
</thead>
<tbody>
<tr>
<td><center><%= @call.user.employee_ident %></center></td>
<td><center><%= @call.unit2_os.strftime("%H:%m") %></center></td>
<td><center><%= @call.unit2_cl.strftime("%H:%m") %></center></td>
</tr>
</tbody>
</table>
<br>
<table class="table">
<thead>
<tr>
<th><center>Unit #3</center></th>
<th><center>Time On Scene</center></th>
<th><center>Time Clear</center></th>
</tr>
</thead>
<tbody>
<tr>
<td><center><%= @call.user.employee_ident %></center></td>
<td><center><%= @call.unit3_os.strftime("%H:%m") %></center></td>
<td><center><%= @call.unit3_cl.strftime("%H:%m") %></center></td>
</tr>
</tbody>
</table>
<br>
<table class="table">
<thead>
<tr>
<th><center>Unit #4</center></th>
<th><center>Time On Scene</center></th>
<th><center>Time Clear</center></th>
</tr>
</thead>
<tbody>
<tr>
<td><center><%= @call.user.employee_ident %></center></td>
<td><center><%= @call.unit4_os.strftime("%H:%m") %></center></td>
<td><center><%= @call.unit4_cl.strftime("%H:%m") %></center></td>
</tr>
</tbody>
</table>
</div>
</div>
下面我在Calls Controller中添加了供您参考，以供您参考。
Below I have added in the Calls Controller for your reference should you need it.
呼叫控制器
class CallsController < ApplicationController
before_action :set_call, only: [:show, :edit, :update, :destroy]
# GET /calls
# GET /calls.json
def index
@calls = Call.all
@active_calls = @calls.select{|x| x.status == 'ACTIVE'}
@pending_calls = @calls.select{|x| x.status == 'PENDING'}
end
# GET /calls/1
# GET /calls/1.json
def show
end
# GET /calls/new
def new
@call = Call.new
end
# GET /calls/1/edit
def edit
@call = Call.find(params[:id])
end
# POST /calls
# POST /calls.json
def create
@call = Call.new(call_params)
respond_to do |format|
if @call.save
format.html { redirect_to @call, notice: 'Call was successfully created.' }
format.json { render :show, status: :created, location: @call }
else
format.html { render :new }
format.json { render json: @call.errors, status: :unprocessable_entity }
end
end
end
# PATCH/PUT /calls/1
# PATCH/PUT /calls/1.json
def update
respond_to do |format|
if @call.update(call_params)
format.html { redirect_to @call, notice: 'Call was successfully updated.' }
format.json { render :show, status: :ok, location: @call }
else
format.html { render :edit }
format.json { render json: @call.errors, status: :unprocessable_entity }
end
end
end
# DELETE /calls/1
# DELETE /calls/1.json
def destroy
@call.destroy
respond_to do |format|
format.html { redirect_to calls_url, notice: 'Call was successfully destroyed.' }
format.json { head :no_content }
end
end
private
# Use callbacks to share common setup or constraints between actions.
def set_call
@call = Call.find(params[:id])
end
# Never trust parameters from the scary internet, only allow the white list through.
def call_params
params.require(:call).permit(:call_time, :status, :primary_type, :secondary_type, :site, :address, :unit_1, :unit_2, :unit_3, :unit_4, :call_details, :unit_on_scene, :unit_clear, :call_num, :site_id, :user_id, :unit2_os, :unit2_cl, :unit3_os, :unit3_cl, :unit4_os, :unit4_cl)
end
end
用户模型：
class User < ActiveRecord::Base
# Include default devise modules. Others available are:
# and :omniauthable
devise :database_authenticatable, :registerable,
:recoverable, :rememberable, :trackable, :validatable, :lockable, :timeoutable
end
通话模式：
class Call < ActiveRecord::Base
has_many :users
end
这是我在这里尝试实现的简单图表，但不知道如何进行此工作。.
这是呼叫模式表：
create_table "calls", force: :cascade do |t|
t.datetime "call_time"
t.string "status"
t.string "primary_type"
t.string "secondary_type"
t.string "address"
t.string "call_details"
t.time "unit_on_scene"
t.time "unit_clear"
t.integer "site_id"
t.datetime "created_at", null: false
t.datetime "updated_at", null: false
t.time "unit2_os"
t.time "unit2_cl"
t.time "unit3_os"
t.time "unit3_cl"
t.time "unit4_os"
t.time "unit4_cl"
t.integer "call_number", default: "nextval('call_number_seq'::regclass)"
t.integer "unit_1" <-- References User_id '1'
t.integer "unit_2" <-- References User_id '2'
t.integer "unit_3" <-- References User_id '3'
t.integer "unit_4" <-- References User_id '4'
t.integer "user_id" <-- Only Stores one User_id??
用户表结构：
create_table "users", force: :cascade do |t|
t.string "f_name"
t.string "l_name"
t.date "dob"
t.string "address"
t.string "city"
t.string "prov"
t.string "postal_code"
t.string "tel"
t.date "start_date"
t.string "position"
t.string "employee_ident"
t.boolean "super_user"
t.boolean "admin"
t.boolean "dispatch"
t.boolean "patrol"
t.boolean "locked"
t.string "email", default: "", null: false
t.string "encrypted_password", default: "", null: false
t.string "reset_password_token"
t.datetime "reset_password_sent_at"
t.datetime "remember_created_at"
t.integer "sign_in_count", default: 0, null: false
t.datetime "current_sign_in_at"
t.datetime "last_sign_in_at"
t.inet "current_sign_in_ip"
t.inet "last_sign_in_ip"
t.integer "failed_attempts", default: 0, null: false
t.string "unlock_token"
t.datetime "locked_at"
t.datetime "created_at", null: false
t.datetime "updated_at", null: false
关于此问题，我在此处也发表了类似的帖子，但它更多地与选择框相关->这更多地是找出如何显示存储在DB中的Unit_1,2,3,4列（整数）中的employee_ident的过程。
I have a similar post here in regards to this question but it pertains more to the select box -> this is more of a progression to find out how to display the employee_ident that is stored in the Unit_1,2,3,4 columns (Integer) In my DB.
任何帮助都会非常有用，因为我似乎无法从其他文章或遇到此问题的用户那里找到很多东西。
Any help would be great as i cant seem to find much in terms of other articles or users having this issue.
预先感谢。
推荐答案
这是通过创建联接表来完成的。感谢所有浏览此页面的人。
This was accomplished by creating a Join Table. Thanks to all who viewed this page.
这篇关于如何引用和保存多个User_ID到一个表单中，并在索引中显示所说的ID /显示Rails 4 App的页面的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持！