similar to: validates preference of at least one param

I want to write a validate routine to check to enforce that a position must be unique in a category. (In another category, it doesn''t have to and shouldn''t need to be unique.) I write this code which works happily for new items: def position_in_category_not_unique @items = Item.find( :all, :conditions => [ "category_id = ? AND position = ?", category_id,

i think there ara two ways of relate products and categories , basically i want to fix one product(e.g hp dv7....) to some categories (notebook,17"notebooks...) i made a table named categorization(incuding category_id,product_id fields) then in models i write these codes below class Product < ActiveRecord::Base has_many :categories, :through => :categorizations

Hi Gurus, I''m trying to tackle a drop down list. I have category and item dbs, and they''re wired up with category has_many :items and item belongs_to :category, and an item has a category_id. I have this code in my new/edit.html.erb for item: <%= f.collection_select :category_id, Category.find_main, :id, :header, {}, :multiple => false %> And a pretty drop down list

Hi all, I am a newbie to Rails. Please enlighten me on how to do this appropriately, the Rails and the Ruby way: Suppose I have a Recipe model. Let''s simplify things and pretend that it has only 2 attributes, a :name and the other is a ''category_id''. In the recipes table, category_id is a foreign key to field id of table categories. We also assume that I have generate

I have a form that sends the following query string to my Rails controller: transaxion[category_association_attributes][][category_id]=2& transaxion[category_association_attributes][][amount]=12& transaxion[category_association_attributes][][category_id]=1& transaxion[category_association_attributes][][amount]=8 But ActionController parses it as:

Is there any reason that foreign key fields do not show in any of the scaffold views ? project table: id serial primary key, category_id integer, user_id integer, name varchar, morestuff varchar foreign key (category_id) references categories(id), foreign key (user_id) references users(id) scaffold generated views only show name, morestuff fields

I want to be able to find items according to various params - category_id, member_id, type_id, rating, etc. What I have now is something like: if(@params[''category_id'']) @items=Item.find(:all, :conditions=>["category_id=?", @params[''category_id'']) elsif(@params[''category_id''] and @params[''member_id''])

Hi, I have a small blog application, and I would like to shorten its routes. Here they are: Blog::Application.routes.draw do resources :categories do resources :articles do resources :comments end end A rake routes command produce the following lines: GET /categories/:category_id/articles/:article_id/comments(.:format)

I was brainstorming today about a smooth way to define conditions in an sql query, when the numbers of attributes increase, so does the uglyness. So instead of passing a hash, I thought you could specify the conditions directly in code. I hacked together some example code which actually turned out to work. The result is concise and pretty beutiful. def search(params) Ad.find(:all) do

Hi, I have performed the cookbook tutorial. Before tailoring the views and controllers, when I put in the model recipe.rb: validates_uniqueness_of :title validates_length_of :title, :within => 1...20 And I tried to introduce some new recipe without the above conditions I got the message: --------------------------------------------------- New recipe 1 error prohibited this category from

Hi, I have an array with objects and I want to generate an XML like: <objects> <object> <category_id>1</category_id> <helper-method>result 1</helper-method> </object> <object> <category_id>2</category_id> <helper-method>result 2</helper-method> </object> </objects> The helper

The AWDwR book has the following: add_index :categories_products, [:product_id, :category_id] add_index :categories_products, :category_id The first, composite index actually serves two purposes: it creates an index which can be searched on both foreign key columns, and with most databases it also creates an index that enables fast lookup by the product id. The second index then completes

The documentation states as an example: select("post", "person_id", Person.find_all.collect {|p| [ p.name, p.id ] }, { :include_blank => true }) could become: <select name="post[person_id]"> <option></option> <option value="1" selected="selected">David</option> <option

Is it possible to specify a route like this: /items(/category/:category_id)(/order/:order)(/page/:page) and have any of the parts in parentheses be optional? I know I can make :category_id and the other vars optional, but is it possible with the entire "/category/:category_id" part? thanks csn __________________________________ Yahoo! Mail - PC Magazine Editors''

I really hope this is not a bad question (as in he''s abusing the list). However I could use a little direction (even though I''m reading books, tutorials) Right now I''m getting a undefined method `category'' for 4:Fixnum The specific lines from the rhtml file are: <td><%= link_to position.category_id.category, :action => "show", :id =>

2 tables Items and Categories Categories (id, name) Items (id, name, category_id) Category_id can be null, and there are Categories that has not an Item. -- Posted via http://www.ruby-forum.com/. --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "Ruby on Rails: Talk" group. To post to this group, send email

I''m working on a simple CMS. The main data type are "listings" a listing habtm (has_and_belongs_to_many) categories and subcategories. Subcategories belong_to categories. Subcategories are basically the same as categories, but they are treated differently in a few situations. The problem is, I can''t seem to write the view/controller/model code that allows me to

I am at a lost with error below: Extracted source (around line #15): 12: <p><b>Category:</b><br> 13: 14: <select name="product[category_id]"> 15: <% @categories.each do |category| %> 16: <option value="<%= category.id %>" 17: <%= ''selected'' if category.id == @product.category_id

Hello, First the specs: ruby 1.8.6, rails 1.2.3, ferret 0.11.4, mongrel 1.0.1, mongrel_cluster 0.2.1 And the model''s aaf config: # Ferret search engine acts_as_ferret({:fields => {:name => {:boost => 10}, :summary => {:boost => 2}, :body => {:boost => 1, :store => :no},

Hi all, I''m trying to create a related dropdown box: In my view: <select name="category" id="category"> <option value="">Select category</option> <% @categories.each do |category| %> <option value="<%= category.id %>"> <%= category.title %> </option> <% end %>