similar to: Non model cascading selects

Hi friends! I''m relatively new with Rails and I''m struggling for a long time with this problem (it should have a pattern solution but until now I didn''t find it): I have the following models: Institution, City, State and Country. class Country < ActiveRecord::Base has_many :states has_many :cities, :through => :states end # == Schema Information # Table

Hi, I''m new to rails/ruby having come from PHP and am just starting to get my head round how easy it can be :) However, can anyone point me in the right direction for dynamicaly updating a select box based upon the choice of a previous select box, without a page refresh. Any and all help greatly appreciated. Thanks -- Posted via http://www.ruby-forum.com/.

Hello all, I have created a migration add_details _to users ... ( city_id , profession ) and then migrated it.. when i use params[:user] to update the database by taking user inputs from forms in views, it is not updating the database for these city_id and profession... ( not changing from null ) if add validation for presence of city_id .. it is giving the error "City id cant be

Hi I have three drop downs (State, City, Locality) and would like to populate City based on State selection and Locality based on City selection. I have observers on two fields (State, and City). The observer_field on state works fine and it populates city based on state selection. But the observer on city doesn''t populate Locality. Now sure whats wrong with my code. here is the

I have been using multiple observers, i.e., observe_field(), on the same input field and relying on them to execute in the same order that they appear in the page. This has been working fine in FireFox, but it does not seem to work in MSIE; the requests come in and are processed in a different order. Now, I''ve always been a little hesitant about using this technique, but it always

Hi All, I took this idea Christian Hellsten and Jarkko Laine''s "Beginning Ruby on Rails E-Commerce". Here is the situation. I will be using the "options_from_collection_for_select" and "collection_select" form helper methods in my view to render drop-down selection lists for City and State that have corresponding city_id and state_id foreign key references

Hello, How do I get params from a form to use with a paginator? debug(params) shows this city: !map:HashWithIndifferentAccess id: "1" but in my controller, when I try to use @hotel_pages = Paginator.new self, Hotel.count(:conditions => "hotels.city_id = params[:city][:id]"), 3, @params[''page''] it doesn''t work. I suppose it''s a simple

belongs_to :through Why is that not possible? We should have: Street belongs_to :city belongs_to :country, :through => :city -- Posted via http://www.ruby-forum.com/.

class Event < ActiveRecord::Base belongs_to :venue belongs_to :category end class Venue < ActiveRecord::Base belongs_to :city end class City < ActiveRecord::Base belongs_to :state end I want to retrieve all event records belonging to a state. Coming from hibernate background I tried something like this: def self.list_for_a_state(state_id) find_by_sql(["select e.*

I''ve encountered what seems like an odd omission in the behaviour of belongs_to associations: if you assign to the foreign key attribute, it doesn''t update the associated object (or mark a previously loaded one as stale) until you explicitly save or reload it. Let''s say we have a Company model, which belongs_to :city : >> torchbox =

Hello, Let''s say I have a model for a "house". Each house has_a "city", which in turn has_a "state" which in turn has_a "country". The objective is to retrieve all houses in a given state, say "Massachusetts". Being new to Ruby on Rails what I like is that things that should be simple usually are simple, and since we have easy access to

Can''t seem to find an example of this anywhere - how do I populate a select list in a form from a database? I have a form to create a new task. The task is for a client, so there should be a select list populated from my clients table. I thought this would work: <%= select ''task'', ''client_id'', Client.find_all, "id", "name"

The DB load on my site is getting really high so it is time for me to cache common queries that are being called 1000s of times an hour where the results are not changing. So for instance on my city model I do the following: def self.fetch(id) Rails.cache.fetch("city_#{id}") { City.find(id) } end def after_save; Rails.cache.delete("city_#{self.id}"); end; def

Hi, i am using the default validation of RoR how i will customize them i dont want to display the default message but i want to print the message i want like for city_id the default message is "City can''t be blank" i want this message as "Please enter city" Regards -- You received this message because you are subscribed to the Google Groups "Ruby on Rails:

Hello, I am a grad student in the Music Engineering Technology program at the University of Miami. I am planning on doing thesis research on cascading audio encoding chains and how to eliminate or improve audible artifacts in future encoding generations and will potentially be using Ogg for this work. My specific question is, Has anyone done any prior work in cascading audio encoders? If so, it

During the interesting interview that binaryfreedom has made with Monty and Jack, Monty mentions cascading, a feature that will be added, quote: "Cascading is the ability to make multiple passes through the frequency spectrum, iteratively filling in more detail, like a progressive jpeg". What are the advantages of something like this - does this generally improves quality or is it used

Hi I have three drop downs (State, City, Locality) and would like to populate City based on State selection and Locality based on City selection. I have observers on two fields (State, and City). The observer_field on state works fine and it populates city based on state selection. But the observer on city doesn''t populate Locality. Now sure whats wrong with my code. here is the

I have in my view the following: <% 0.upto(@num_performances) do |idx| -%> <%= text_field ''performance'', ''city'', :index => idx, %> <%= text_field ''performance'', ''venue'', :index => idx, %> <% end -%> and in my controller I have: @performance = [Performance.new("city" =>

I have a page, which renders a partial that contains a ''State'' drop down list. Upon change, it re-renders the ''City'' drop down, re- populating it based on selected state_id: Page: /customer/new.rhtml <% form_for :customer, :url => customers_path do |f| %> State: <%= f.collection_select :state_id, State.find(:all), ''id'',

Sorry for asking this but I am keen to get on and build an app based on RoR and have had a look around at FAQa and the like with no immediate sucess. What I am looking for is an explainantion of the rules/requirements for table/index/coulumn names with RoR. RoR appears to have a set of expected naming conventions which it would appear you can over ride but it would seems a hell of a lot