Re: [Rails] NoMethodError (undefined method `length=' for #<Tour:0x000000081583f0>):

[Colin Law]

On 28 March 2013 13:07, <maciej...@timeself.pl> wrote:
> Hey
>
> I have a problem with nomethoderror and have no idea how to solve it.
>
> In logs:
>
> NoMethodError (undefined method `length=' for #<Book:0x000000081583f0>):
> 2013-03-28T12:38:35+00:00 app[web.2]: app/models/engine/book.rb:13:in
> `block in find_or_create_by_guide'
> 2013-03-28T12:38:35+00:00 app[web.2]: app/models/engine/book.rb:9:in
> `find_or_create_by_guide'
> 2013-03-28T12:38:35+00:00 app[web.2]:
> app/controllers/guide_controller.rb:37:in
> `find_or_create_book_based_on_guide'
>
> cache: [GET /en/books/planner/preview] miss
> 2013-03-28T12:38:35+00:00 app[web.2]: Processing by BooksController#preview
> as */*
> 2013-03-28T12:38:35+00:00 app[web.2]: Parameters: {"locale"=>"en",
> "id"=>"planner"}
> 2013-03-28T12:38:35+00:00 app[web.2]: Unknown label 'www'. Switching label
> to bookless
> 2013-03-28T12:38:35+00:00 app[web.2]: Finded book #515439c0e622d90002000019
> 2013-03-28T12:38:35+00:00 app[web.2]: Completed 500 Internal Server Error in
> 82ms
>
> Book.rb:
> module ClassMethods
> def find_or_create_by_guide(guide)
> book = ::Book.find_or_create_by_document(guide.id.to_s) do |t|
> t.city_id = guide.city
> t.host = guide.host
> t.pace = guide.pace || :normal
> t.length = guide.length
> end
> Later in Book.rb, I have:
>
> groups = sorted_points.in_groups_of(length, false)
>
>
> In Book.rb I have attr_accessible :length. I've also updated the table with
> length column:
> class AddLengthColumnToBooks < ActiveRecord::Migration
> def change
> add_column :books, :length, :integer
> end
> end
>
> I have no idea what's going on. Can someone please help me with this?

The error refers to book.rb but you refer to Book.rb. Is that just a
typing error?

What happens if, in the Rails Console you do
Book.first.length

I presume you have run the migration. Have you checked using a
database tool that the column exists?

I wonder whether length is a reserved word. If all else fails try a
different name.

Colin

[maciej...@timeself.pl]

Hey, thanks for the answer.

As for the Book.rb - yes, it's a typing error.

When I run Book.first.length in the rails console, I get:

1.9.3-p327 :001 > Book.first.length
  Book Load (0.2ms)  SELECT "books".* FROM "books" WHERE "books"."label" = 'app LIMIT 1
 => nil

And yes, I did run the migration.

I think the problem can lie in Mongo collections. I've added the "length" collection by updating an already working Mongo Document. Maybe that's the problem?  I'll try to set up another mongo document with the length collection only.

class Guide::Document
  include MongoMapper::Document
 
  key :city, Integer
  key :trips, Array
  key :themes, Array
  key :places, Array
  key :pace, String
  key :date_from, Time
  key :date_to, Time
  key :host, String
  key :length, Integer
  timestamps!
end

[Colin Law]

On 29 March 2013 09:57, <maciej...@timeself.pl> wrote:
> Hey, thanks for the answer.
>
> As for the Book.rb - yes, it's a typing error.
>
> When I run Book.first.length in the rails console, I get:
>
> 1.9.3-p327 :001 > Book.first.length
> Book Load (0.2ms) SELECT "books".* FROM "books" WHERE "books"."label" =
> 'app LIMIT 1

Why does that include a WHERE clause? and why is it looking for label = 'app

Colin

[maciej...@timeself.pl]

This is because we have a whitelabel feature in our app, and therefore most columns and tables are labelled to. The label "app" simply means that it loads all the data from our main app.