Commands for work with database

Rails
1

Hello,

can someone help, please, how to work with Active Record?
I’m trying under this page
-Active Record Query Interface — Ruby on Rails Guides

  • building query on database, but I’m getting errors always, when I try
    to use some command except .new, .save, .find, .all.

in application.rb I have:

require “active_record/railtie”
require “action_controller/railtie”
require “action_mailer/railtie”
require “active_resource/railtie”
require “rails/test_unit/railtie”

in my model I have:

class Example < ActiveRecord::Base
include MongoMapper::Document
key :name
end

And now if I try:

exam= Example.order(“name_at ASC”) #–> undefined method `spec’ for
nil:NilClass (that is in a view)

exam= Example.all #–> works

I guess everything for work with AR is ready, but I don’t now, why
commands as .order, .where, .first etc not works… :frowning:

I’m using Rails 3.0.5 and MongoDB.

2

On Apr 1, 3:21pm, Manny 777 [email protected] wrote:

require “active_record/railtie”
end

I’m using Rails 3.0.5 and MongoDB.

If you’re using mongodb then your class shouldn’t be inheriting from
ActiveRecord. Skip straight pass the active record documentation and
read up on mongomapper (or whatever mongo adapter you fancy using -
mongoid is another popular one)

Fred

3

Thanks Fred, at least I know, what to search…

I have that feeling I am solving problems with gems, plugins, interfaces
instead programming of apps… Not funny.