Writing Nested Form in RoR - ruby-on-rails

Question

I'm trying to write a nested form in ROR.
I have two tables Employee and EmployeeInfo and both table have a column named employeeID
these tables are connected with this key.
What i want to do is to create a form with some input fields which should update the values into both tables.
for eg i want a form which can create or update fields named employee_name, age, address and city But employee_name and age are present in table Employee and city and address are present in table EmployeeInfo.
So how should i write the form tag inorder to do this.
Please be sorry if question is a blunder. I'm realy new to this. Pls help

Answer 1

Extending #emu's answer
Models setup
#employee.rb
Class Employee < ActiveRecord::Base
has_one :employe_info
accepts_nested_attributes_for :employee_info
end
#employee_info.rb
Class EmployeeInfo < ActiveRecord::Base
belongs_to :employee
end
Controller
Class EmployeesController < ApplicationController
def new
#employee = Employee.new
#employee.build_employee_info
end
def create
#employee = Employee.new(employee_params)
if #employee.save
redirect_to #employee
else
render 'new'
end
end
private
def employee_params
params.require(:employee).permit(:employee_name, :age, employee_info_attributes: [:id, :city,:address])
end
end

Answer 2

In rails 4 you need to use
accepts_nested_attributes_for :employeeinfo
in your employee model. And also employee has the relation with emplyeeinfo is has_one.
in the form:
<%= form_for #employe, :html => { :multipart => true } do |f| %>
<% if #employe.errors.any? %>
<div id="error_explanation">
<h2><%= pluralize(#employe.errors.count, "error") %> prohibited this employe from being saved:</h2>
<ul>
<% #employe.errors.full_messages.each do |msg| %>
<li><%= msg %></li>
<% end %>
</ul>
</div>
<% end %>
<div class="field">
<%= f.label :employee_name %><br>
<%= f.text_field :employee_name %>
</div>
<div class="field">
<%= f.label :age %><br>
<%= f.text_field :age %>
</div>
<%= f.fields_for :employeeinfo do |s| %>
<%= s.label :address %><br>
<%= s.text_field :address %>
<% end %>
<div class="actions">
<%= f.submit %>
</div>
<% end %>
Please edit the form objects according to your model name.

Answer 3

Foriegn Key
Firstly the "connector" key you're referring to is called a foreign_key.
This is a standard relational database feature, allowing you to "join" two or more databases together with a single reference point. Whenever you use associations in Rails, you'll basically have to join the two datatables with a foreign_key
both table have a column named employeeID
Your employee_infos table only needs to have the foreign_key employee_id:
#app/models/employee.rb
Class Employee < ActiveRecord::Base
has_one :employee_info #-> foreign key = "employee_id"
accepts_nested_attributes_for :employee_info
end
#app/models/employee_info.rb
Class EmployeeInfo < ActiveRecord::Base
belongs_to :employee
end
Forms
As mentioned by Emu, you'll need to use accepts_nested_attributes_for
This allows you to pass data from a "parent" model to a child model, exactly what you have set up currently. The difference being you have to ensure you have it set up correctly.
Regardless of what you think, this is how you need to do it. You mention yourself that you're very new to Rails; which means your objections are likely based on your current DB setup. This might not be correct
You should use emu & Pavan's answers to fix this :)