Creating Many Models in One Form (Page 3 of 3)

I'm sorry. I'd love to be able to help you directly, but my suggestion is actually that you take a few steps back and refactor lots of stuff.

Check out the api on the form helpers... especially collection_select:
http://api.rubyonrails.org/classes/Acti … ml#M000941

Also, it's best - if you are going to work with rails - to follow rails conventions. Don't fight it, go with it. For example, in rails, tables have plural names by convention. That's a start.

Check out the api on model associations and the handy methods that get thrown in with each. In your app structure, you have an natural fit for a :has_many :through relationship. A student "has many" classes" through "enrollments" ...and vice versa. I suggest you set it up this way. Create a "students" table with student info, a "classes" table with information about each class, and a join table called "enrollments" which joins a student to a class.

http://api.rubyonrails.com/classes/Acti … ml#M001103

You could then create a "grades" table and associate it with your "enrollments" table. So, again, a "student" would have many "grades" through "enrollments"... and a class would have many grades through enrollments (allowing you to easily average grades by class, for example).

That's my suggestion. It's not going to help you all that much to rush just for the sake of rushing. Dig in... and enjoy it!

I have been trying to do something very similar.

Take a look at:

http://www.ruby-forum.com/topic/165891

Hi
Can someone help me to figure this out...

I have 2 models called Register_record and Attendance.A Register_record has many Attendances.

I have a form which allows user to select the date, and a Register_record will be saved from that date.For that register_record many attendances have to be saved.

class RegisterRecordsController < ApplicationController
  layout'profile'
  def new
    @register_id=@id
    @record=RegisterRecord.new
   
@students=StudentClass.new().get_allstudents_regno(session[:current_class])
   
    @rec_no=@students.size
    @rec_no.times{@record.attendances.build}
  end

For each student in @students array I have to display the name and display a text field to insert attendance in front of the name.

After this we have to save the students name and the corresponding attendance value in Attendances table from the Register_record Id.

I tried to hash the name of student and the attendance value(user input from text field)but didnt work.
Can someone suggest a solution for this.

Thanx

Hi Javix,
Thanks for your reply.. I dont think I was clear the 1st time. The problem is as follows.

My 2 models are
    1.RegisterRecord
    2.Attendance

class RegisterRecord < ActiveRecord::Base
  has_many :attendances
  belongs_to:register
end

class Attendance < ActiveRecord::Base
  belongs_to :register_record
end

Now I need to save a register record by a 'date' selected by the user. A RegisterRecord belongs to a Register.A Register belongs to class.
In the new action of following code I get all students enrolled in the class to @students array.And I build an 'Attendance' for each student.

class RegisterRecordsController < ApplicationController
  layout'profile'
  def new
    @register_id=@id
    @record=RegisterRecord.new
   
    @students=StudentClass.new().get_allstudents_regno(session[:current_class])
   
    @rec_no=@students.size
    @rec_no.times{@record.attendances.build}
  end

Now the form which is used to save the RegisterRecord has following requirements.

Register Number of student                                  Attendance
==========================                                  =============
012345A   *Taken from @students array                         1# Input from user
012346B                                                       0#
083643H <----I need to merge these 2 values and save them---> 1#

Enter Date :[________]

                                           Submit

I need to create 'one' textfeild for each student.But the following code generates many textfeilds because of the nested for. But I cant figure out any other way also.

<%if @students.blank? %>
                <td class="infoMessage"colspan="2"><center>No students enrolled in this class.                    Make each student enrol for this class..</center></td>
              <%else%>

                     <%form_tag({:controller => "register_records", :action => "create"}, :method => "post") do%>
                     <tr>
                         <%for student in @students  %>
                           <td>

                            <%=label :Reg_number,student  %> </td>
   
                            <%@record.attendances.each_with_index do |attendns,index|%>
                            <% fields_for "attendances[#{index}]", attendns do |f| %>
                           
                           
                            <td >
                           
                            <%= f.text_field :attendance %>
                            <%f.hidden_field:Reg_no,:value=>student%>
                            </td>
                           
                             <% end %>
                    <%end%>
                             </tr>
                             
                     <%end%>

                    <tr>
                      <td colspan="1">
                      Select Date:</td>
                      <td colspan="1">
                        <%= calendar_date_select_tag :Record_date,'click on the icon ' %>
                      </td>
                               
                                <tr>
                                <td  colspan="2"> <%= image_submit_tag("SavecommonButton3Hover.gif" , :align => "right", :height => 25, :width => 59, :border => 0)%></td>  </tr>                    </tr>
                                <%end%>
   

I need to merge the value of attendance to each corresponding student registration number.
One RegisterRecord will be saved with the date.
For the id of that RegisterRecord many Attendances will be saved in attendances table.

class CreateAttendances < ActiveRecord::Migration
  def self.up
    create_table :attendances do |t|
      t.integer :register_record_id
      t.string :registration_no
      t.boolean :attendance

      t.timestamps
    end

class CreateRegisterRecords < ActiveRecord::Migration
  def self.up
    create_table :register_records do |t|
      t.integer :register_id
      t.integer :entered_by
      t.date :record_date
      t.boolean :approval
      t.integer :validated_by

      t.timestamps
    end
  end

Thankx in advance. 

P:S: I tried to create a hash and hash the Student registration number and the attendance value which will be a user input. But I got a hash with only the registration numbers hashed. The attendance values did not get hashed. They remained blank.
And the hash looked something like

{"012345A"=>"","012345A 012346B"=>"","012345A 012346B 083643H  "=>"" }

Hi

Actually I'm hoping to save a RegisterRecord by the date the user input and many Attendances for this RegisterRecord will be saved.
I can't merge the values of Student register number and the corresponding attendance.There for I'm stuck at this point.

def create

@register_record=RegisterRecord.new({"register_id"=>params[:Reg_id],"entered_by"=>session[:user_id],"record_date"=>params[:Record_date]})
if @register_record.save
        flash[:notice] = 'Register Record Successfully saved'
  end
  end

Saving attendances is yet to be implemented.Which is the problem here

I am having trouble creating a parent/child single form when using formtastic. Can anyone provide any insight into how to do this?

I am trying to convert my existing code (based on Ryan Bates' railscast - Complex Forms).

A Job has_many Questions.

I am trying to incorporate into the create job form the ability to create some questions at the same time.

#jobs_controller.rb
  def new
    @job = Job.new
    3.times {@job.questions.build}
  end

# jobs/new.html.erb
<% semantic_form_for @job do |f| %>
  <% f.inputs do %>
    <%= f.input :title %>
  <% end %>
 
  <% @job.questions.each_with_index do |q, i| %>
    <% f.semantic_fields_for :question_attributes do |qf| %>
      <% qf.inputs do %>
        <%= qf.input :job_id, :as => :hidden, :value => 'job[id]' %>
        <%= qf.input :question %>
      <% end %>
    <% end %>
  <% end %>
 
  <%= f.buttons %>
<% end %>

In Ryan's cast the submitted objects should take the form
job[question_attributes][][question] but I do not know how to convert them into that array of questions.

Thanks =~ Jeremiah