similar to: An object that initializes multiple objects?

Hi All, I need your suggestions for the following. I am still learning RoR and pardon my ignorance. I have say two tables. Table A : students Table B : addresses Table B has student_id as the foreign key to Table A If I am displaying the list of students and wanted to get individual students addresses based on their id, is the only option is to get the id from students controller method list

I am very confused about where to put the belongs_to and the has_one (and other relationship identifiers). I have read the RDoc and the agile book many times about this and I think i still see it backwards. Let me outline my app so you have an understanding... I have 2 tables: Schools { id, school_name, address_id } and Addresses { street1, street2, city, state, zip, country } *** this

I have the following model structure setup. class User < ActiveRecord::Base end class Parent < User has_many :relationships has_many :children, :class_name => "Student", :through => :relationships, :conditions => "related_as = ''parent''" end class Student < User has_many :relationships

R-help group, I'm looking for some assistance on using an R-script to read STDIN from hadoop. Example, say I have two tables. One is a student table, the other is a class roster table (tables join on student_id). Student SAT score is in the student table, whether the student passed or not is in the roster table. So to determine if a student passed or failed based on their SAT score, I'd

Hey- I''m using ROR 1.0 and script.aculo.us 1.5.1. I''ve been trying unsuccessfully to render a partial in a DIV, but can''t seem to get the right combination of stuff to make it work. There seems to be a few different ways of going about it. Right now I can render a partial. What do I need to to render the partial in a div? Here is what it looks like so far: #

Hello folks- In one particular app, it would be useful for the customers to be able to specify the significance (and presence) of fields. For example, consider a CONTACTs database. User 1 wants to have phone1, phone2, phone3, and User 2 wants to have 4 address fields. Generically, this could be done by having a CONTACT with, say, 10 strings, 10 integers, etc. The user''s account

Im having an issue that seems to only happen when trying to use a transaction. Ive used transactions many times in the past and Im at a loss as to why im getting the stack level too deep problem. SystemStackError - stack level too deep: actionpack (3.2.13) lib/action_dispatch/middleware/reloader.rb:70:in `'' I have a StackOveflow with more detail -

People, I want to design a historical sports db for my old school. I think at the moment it should be like: A year has many teams A team has many students A student has one lastname, firstname and middlename but a student can also have many teams (eg summer/winter abd over a number of years) . . Is there a problem with this? Doesn''t it just mean that there will be a student table

Considering an object with several has_many :through => associations, what is the ''best'' way to handle validations? As an example: class Student < ActiveRecord::Base # some attrbutes like # :name # :grade # relationships has_many :students_assignment, :dependent => :destroy has_many :assignments, :through => :students_assignment has_many

has_many :through is great. Is there anyway to find the association that it went through? Example: class Student has_many :projects has_many :grades, :through => :projects end student.grades[3].project Is it clear what I''m asking? How would this be done? -- Posted via http://www.ruby-forum.com/.

It seems that using a join model that joins with two has_many''s will fail to generate proper SQL class StudentSemesterRecord < ActiveRecord::Base belongs_to :semester has_many :discipline_records, :through => :semester end class Semester < ActiveRecord::Base has_many :student_semester_records has_many :discipline_records end class DisciplineRecord <

hi everyone.. i''m a high school teacher who wrote a webapp in PHP and MySQL for my curriculum.. i use it to keep attendance, take notes per student or class and keep track of activities. i would like to soup it up and have read both the pickax and version 2 of agile web dev... now i''m starting to work and i''d like to rename columns and relationships in the database so

Hi, I am very confused about an aspect of has_one and has_many relations, with regard to using the build method, and saving the belongs_to side. It''s a somewhat long post. so please bear with me :) First let''s consider the has_one scenario. Let''s say I have a student who must own exactly one car: class Student has_one(:car) end class Car belongs_to(:student)

Here''s a join table for an educational institution: create_table "student_appointments", :force => true do |t| t.column "supervisor_id", :integer, :default => 0, :null => false t.column "student_id", :integer, :default => 0, :null => false t.column "course_id", :integer, :default => 0, :null => false [other columns

I am doig something very simple here and this is not working correctly. So any help is greatly appreciated. I ahve this code in my template: <% form_for :company_branch, @company_branch, :html => {:id => "company_branch_form"} do |f| %> <%= f.text_field :street1 %> <%= f.text_field :street2 %> <% end %> <%= observe_form("company_branch_form",

Hi all, I need to export the document as csv file, i have exported successfully, but the problem is not displayed as per my format, in csv file the format is suffuled, i want the orderwise as how i have mentioned in my query, please help me to come out in the order wise. My coding is: @report_data=EdiaUserContact.find_by_sql( "SELECT '''' as ''Title'',

I am working with mapping ActiveRecord onto a legacy database. All is going well (using set_table_name, set_primary_key, etc), but I can''t get my many<=>many relationships to work. My contrived example of the situation: Student has_and_belongs_to_many Teachers. This is mapped via table student2teacher where the foreign keys are studentId and teacherId. The primary key in Student

I''ve been digging into rails, but this one question has been a two day stumper. I''ve got a question/answer model that I''m trying to work out. Each question has multiple answers (they''re more like choices, it doesn''t matter whether they''re right or wrong), and I''d like to have the question creation form also have multiple fields in

Hi! I''ve successfully created a Rails web service. I can connect to it with an XML-RPC client, without any problems at all. However, when I try to use a gSOAP application to connect to the web service, it doesn''t work. The back trace that I get is at the end of this message. From the back trace, it appears that the SOAP request is not being recognized as a SOAP

Hi! I''ve successfully created a Rails web service. I can connect to it with an XML-RPC client, without any problems at all. However, when I try to use a gSOAP application to connect to the web service, it doesn''t work. The back trace that I get is at the end of this message. From the back trace, it appears that the SOAP request is not being recognized as a SOAP request, and