similar to: nOOb question: How to use find_all with form input data

I started with Ruby on Rails in the 0.13.x period, so I''m sure I missed out on a lot of history. There''s probably some good explanation for something I''ve been wondering about, but I haven''t seen it written down anywhere. Maybe someone can clue me in. I''ve always felt that one of the uglier APIs was the ActiveRecord::find() method. I call

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 %>

It looks rails automatically creates a "finder" method on models that have a "belongs_to". So I tried this in the console: c = Category.find(2) chunks = Chunk.find_by_category(c) chunks is always returned as an empty array. When I know have some chunks with a category_id of 2. Should the find_by_category do what I think it should be doing or am I completely off base?

I need to check if a parameter is set so that I can build some information for my application, but No matter how I format my if statement in the file " Application.rb" it return the following error. You have a nil object when you didn''t expect it! You might have expected an instance of Array. The error occurred while evaluating nil.[] Here is the line if params[:day] So we

Hi there, I''ve been working on this for awhile and have finally decided to ask for a little guidance.I have a slight problem trying to save a selection. I have two models: A "Posting" has_many "Categories", and a "Category" belongs_to one "Posting". With that said, in the posting model I have "has_many :categories" and within the

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

yop, http://rubyonrails.org/api/classes/ActionView/Helpers/FormHelper.html ici j''ai vu qu''on pouvait g?n?rer des ?l?ment d''un formulaire gr?ce des m?thodes. Apres quelque petite recherches j''ai trouv? comment g?n?rer un select <%= select(''category'', ''category.id'', Category.find_all.collect {|category| category.nom})

This works : class Recipe < ActiveRecord::Base belongs_to :category end But (when I add validation) this does not work : class Recipe < ActiveRecord::Base belongs_to :category validates_length_of :category, :within => 6..20 validates_uniqueness_of :category, :message => "already exists" end thank you -- View this message in context:

Hi I''m new to this forum and new to Rails so excuse me if this is a daft question. I''m following the ONLamp.com tuturial and all has been well untill changing the template for the recipes. I have followed the instructions and added this code to the controller: class RecipeController < ApplicationController scaffold :recipe def list @recipes = Recipe.find_all end

Ahoy, I made this pager, " def list @item_pages = Paginator.new self, Item.count, 10, @params[''page''] @items = Item.find :all, :conditions => "category_id = #{params[:condition]}", :limit => @item_pages.items_per_page, :offset => @item_pages.current.offset @categories = Category.find_all

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 there, I try to develop a medical application using ruby on rails. There are many categories which can contain subcategories. I defined the model like this: class Category < ActiveRecord::Base has_and_belongs_to_many :notes belongs_to :parent_category, :class_name=>"Category", :foreign_key=>"category_id" has_many :sub_categories,

I have the following statement cl = ChatEvent.find_all("ev_type <> #{t} and chat_id = #{@params [:chat_id]} order by created_at") which produces the following error: #42000You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near ''order by created_at)'' at line 1: SELECT * FROM

How does one properly get find_all to grab the data from the DB table ordered by a specific column? For example: @anglers = Angler.find_all This code gets all the angler records and they are sorted in order of the id field which is of course set as a primary key in the DB (mysql). I''d really like to pull the data from the DB sorted in the order of another field, for example

Hi, Ive followed the pets/people ajax_scaffold example without any problem. I have a table documents and each document has a category. In the documents table i have a field called category_id. So in the documents grif i want to display the corresponding catgory name and when it comes to adding a new category or editing the have a drop down list to select from. category.rb require

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

I have a nice hierarchical table structure like this: divisions has_many groups groups belongs_to division has_many subgroups subgroups belongs_to group has_many units units belongs_to subgroup I have a report which is based on units, but i want to be able to filter the units by which subgroup, or which group, or which division. I also want to sort them by division.name,then group.name,

3: 4: <b>Category: </b> 5: <select id="item_category_id" name="item[category_id]"> 6: <%= options_from_collection_for_select @categories, "id", "category", @product.category_id %> 7: </select> 8: </p> 9:

I have an archive that can have 0 or more extra files associated with it. I would like to be able to edit the associated files info on the same page as the archive info. Listing the extra files info to the edit form is simple enough, but How do I form the text input fields for easy (or automatic) pick-up in the update? Or am I barking up the wrong tree here? -- Posted via

I''m working on a simple photo gallery in rails, it seems to be a good project for a newbie. I have photos and categories, many-to-many association. It worked well with HABTM. Then I decided that it would be good to be able to change order of the photos so that thumbnail pages would look less chaotic. So I created a Layout model which is a join model (or whatever it is called) that