Creation of a new page_Rhomobile Beginner's Guide-QQ阅读男生中文科幻网

书名：Rhomobile Beginner's Guide
作者名：Abhishek Nalwaya
本章字数：318字
更新时间：2025-03-31 04:29:55

Creation of a new page

We will now add a new page manually in our employee application, which will list all the employee names and their respective designations.

Let us include following use-cases to make our application more interesting:

If age < 30 then, designation – Developer
If age >= 30 && age <40 then, designation – Senior Developer
If age >= 40 then, designation – Architect

Time for action – Creation of the new page

We will now create a new page (employee_details.erb) that will display the employee name and designation.

Follow these steps to create the page:

Create an action employee_details in employee_controller. We write all the database queries using Rhom, which is an ORM of Rhodes:
```
 def employee_details
     @employee = Employee.find(:all)
  end 
```
By adding Employee.find(:all) we will return an array of an object from the Employee Model.

Create a page employee_details.erb and employee_details.bb.erb in the Employee directory and add the following lines to employee_details.erb:

<div class="pageTitle">
  <h1>Employees Details</h1>
</div>

<div class="toolbar">
  <div class="leftItem regularButton">
    <a href="<%= Rho::RhoConfig.start_path %>">Home</a>
  </div>
  <div class="rightItem regularButton">
    <a class="button" href="<%= url_for :action => :new %>">New</a>
  </div>
</div>

<div class="content">
  <ul>
    <% @employees.each do |employee| %>
    
        <li>
          <a href="<%= url_for :action => :show, :id => employee.object %>">
            <span class="title"><%= employee.name %> is <%= find_desigation(employee.age.to_i)%></span><span class="disclosure_indicator"></span>
          </a>
        </li>
    
    <% end %>
  </ul>
</div>

And, add these lines to employee_details.bb.erb:

<div id="pageTitle">
   <h1>Employees Details</h1>
</div>


<div id="toolbar">
    <%= link_to "New", :action => :new %>
    <%= link_to "Home", RhoConfig::start_path %>
</div>

<div id="content">
  <table>
    <tr>
    <% @employees.each do |obj| %>
        
            <td class="recordLabel"><%= link_to "#{obj.name} is #{find_desigation(obj.age.to_i)}  ", :action => :show, :id => obj.object %></td>
        
    <% end %>
    </tr>
  </table>
</div>

We have used a helper method find_designation, which returns the designation of that employee. This helper is created in the next step.

Create a file employee_helper.rb in the helpers folder.

Include the employee_helper in controller so that it can be accessed in our view:

require 'helpers/employee_helper'
include EmployeeHelper
Add the logic in employee_helper.rb which we created in the last section
module EmployeeHelper
  def find_desigation age
    if age < 30=
      return "Developer"
    elsif age >= 30 and age < 40
      return "Senior Developer"
    else
      return " Architect"
    end
  end
end

Edit index.erb file in app folder to add a link:

        <li>
      <a href="<%= url_for :controller => :Employee, :action => :employee_details %>"><span class="title"> Employee Details</span><span class="disclosure_indicator"/></a>
    </li>

Edit index.bb.erb in the app folder and add a link to our page for Blackberry:

<tr>
        <td class="recordLabel">  <%= link_to "Employee Details", :controller => :Employee, :action => :employee_details%>
</td>

Now, build this code for iPhone as explained in this chapter earlier:

$rake run:iphone

And similarly for Blackberry by:
```
$rake run:bb
```

We just created a new page in which the designation of employees are calculated on the basis of their age. We have also learnt how to write a helper method in our application.