similar to: NoMethodError in Book#show_subjects

I got a following error. NoMethodError in Book#new Showing /home/amrit/boook/app/views/book/_form.html.erb where line #1 raised: undefined method `model_name'' for NilClass:Class The content of _form.html.erb file are: <%= form_for(@post) do |f| %> <% if @post.errors.any? %> <div id="error_explanation"> <h2><%=

I keep getting this exception "SQLite3::SQLException: no such column: books.user_id: SELECT "books".* FROM "books" WHERE ("books".user_id = 4)" ,which sounds like there is no user_id in books table.So i just installed foreigner plugin and added " t.integer :user_id, :null => false" and "add_foreign_key(:books, :users)" in book

I am relating to the book & subject example mentioned in the tutorial mentioned here: http://www.tutorialspoint.com/ruby-on-rails-2.1/rails-examples.htm There is a file that goes like show_subjects.html.erb and it will list all the books for that particular subject we''ve selected. Suppose if there were no books to show for the subject we can ideally show a corresponding message

Hi everybody, I''ve search a lot on google to help me with this one without success. I know that some people had the same problem as I have, but there solutions doesn''t seems to work for me. I''m trying to do the depot example in the AWDwR book. But now I''m stock with a problem that I can''t solve. I get this error: <--- begin error here --->

Ok, totally no reason why I''m getting an error in this model update and no other. HELP! CONTROLLER: # GET /employees/1/edit def edit @employee = Employees.find(params[:id]) end VIEW: <h1>Edit Employee</h1> <div id="main-sub"> <%= error_messages_for :employees %> <% form_for(@employee) do |f| %> <table width="600"

Hello, When i test this code <h1>contenu de votre panier</h1> <table> <% for item in @items product = item.product %> <tr> <td><%= item.quantity %></td> <td><%= h(product.title)%></td> <td align="right"><%=item.unit_price %></td> <td align="right"><%=item.unit_price * item.quantity

My project was working when I add new field category It is showing the error in create form and edit form i am sending u controller file as attechment this is my model(category.rb) dor category file class Category < ActiveRecord::Base has_many :classifieds end and this is edit.rhtml <h1>Editing Classified: <%= @classified.title -%></h1> <%= form_tag :action =>

Hi All, I created a new rails application using rails 1.0. I used "ruby script\generate scaffold" for each of my tables. This worked on all but 2 of my tables. When I go to the new or edit action of my requests or admins table, I get the error below. On one table called admins I hadn''t followed the correct naming convention and wasn''t able to edit or create

I''ve finally determined that the best way to handle administration of a model that displays publicly but is administered privately is through subclassing but I''ve run in to pathing issues (I think) when trying to create an instance of my model. Let''s say I have a Book, and BookController is a sublcass of AdminController so that I can create and delete Books via an Admin

Hello, In my rails application, I have a book model. I want to add tags. For that I have installed acts_as_taggable_on_steroids from this link http://agilewebdevelopment.com/plugins/acts_as_taggable_on_steroids and do as the readme file. This is my Model : class Book < ActiveRecord::Base acts_as_taggable end Here is my ApplicationHelper : module

Hello, I am using InstantRails 2.0 on windows. When building an app,I get this error when hit the browser(Action ControllerException caught): Access denied for user ''root''@''localhost'' (using password: NO) ----------------------------------------------------------------------------------------------- The database.yml file is configured like this: # MySQL.

Hello, i simplified have a news model, a news category model and a news controller. my _news.rhtml partial renders a single news entry. in my controller there are the actions show and show_category. if the "show" action is called, a single news item is rendered through my partial with no errors. if the "show_category" action is called, i get a NoMethodError while displaying

First off, hi, I''m [obviously] new :O) Please excuse my question as I''m sure it''s been answered, but I can''t find it anywhere. I have a table of categories: id name 1 Foo 2 Bar I have things which belong_to categories: id category_id subject date 1 1 my subject 07/09/2004 and Further classifications which belong_to categories: id category_id name 1 1 More

<font face="Verdana,Arial,Helvetica,sans-serif" size="2"> <span><div>Hi,<br>There was a mention of optimizing away C++ dynamic_casts in LTO in this presentation: <a href="https://www.youtube.com/watch?v=Fd3afoM3UOE&t=1306" target="_blank">https://www.youtube.com/watch?v=Fd3afoM3UOE&t=1306</a><br>I

Hi, In a few words, can someone explain to me the NoMethodError. Googling for answers will get you to something but a direct answer from experts will give you something. NoMethodError in Book#new Showing app/views/book/new.html.erb where line #4 raised: undefined method `title'' for #<Book id: nil, created_at: nil, updated_at: nil> Extracted source (around line #4): 1:

Please send any comments. As mentioned at the end I will follow up with some patches as soon as they are cleaned up and I create some test cases. RFC: Safe Whole Program Devirtualization Enablement =================================================== High Level Summary ------------------ The goal of the changes described in this RFC is to support aggressive Whole Program Devirtualization without

Help, i''ve been trapped on the tracks here for a day now in the Agile w/ Rails book (latest edition) I can''t get page 115 to display. It says: You have a nil object when you didn''t expect it! You might have expected an instance of Array. The error occured while evaluating nil.each Extracted source (around line #3): 1: <h1> My Agile Cart</h1> 2:

... ok, I may be going about this the wrong way, or perhaps, a less efficient way than is optimal, but I would like to test a little bit of AJAX on one of my web pages. When I test this by hand, I bring up the page which shows a select box, I select an item from the drop down list, see another select box show up, go back to the first select box, select a different item, and see something

I have the following: @lot = Lot.find(params[:id]) part_nums = Part.all(:conditions => ["id <> ?", @lot.part.id]) I guess I should mention that Lot :belongs_to => :part I was looking at the log following the execution of these two statements and I saw something like this: Lot Load (0.4ms) SELECT * FROM "lots" WHERE ("lots"."id" = 13) Part

I am presently trying to get the cart section (chapter 8.) working and after following the instructions as carefully as I can determine I am nonetheless getting the following errors: URL=http://localhost:3000/store/add_to_cart/10 NameError in Store#add_to_cart undefined local variable or method `parms'' for #<StoreController:0x376ee60>