Is it possible to have named_scope return records unique for a certain column? e.g named_scope :unique_styles, :order =>"title desc", :limit => 3 That will give me three styles but what i...

I'm a little torn. Do unit tests for Scopes in Rails 3 make sense? On the one hand, I'm writing code and I should test that code. However, on the other hand, basically all my scopes are effectiv...

What are these methods and how bad is it to override them? irb(main):001:0> Object::respond_to?('private', true) => true irb(main):002:0> Object::respond_to?('public', true) => true ...

I'm using the latest mongoid... How do I do the mongoid equivalent of this active record named_scope: class Comment include Mongoid::Document include Mongoid::Timestamps embedded_in :post f...

I have been trying to develop a movie based rails application which has support for multiple regions (Hollywood, Bollywood etc). I call the multiple regions as languages in the application. Each l...

I need to join a table to the a select/group-by query (which includes the same table), and I'd like to do it using Arel. I have a table of :phenotypes which are has_and_belongs_to_many :genes, whi...

According to MSDN Library using Statement (C# Reference) Defines a scope, outside of which an object or objects will be disposed. But I got this code posted here by some user and I got confused a...

I have 2 simple named scopes defined as such: class Numbers < ActiveRecord::Base named_scope :even, :conditions => {:title => ['2','4','6']} named_scope :odd, :conditions => {:title ...

Before going for details. Question 1:-- What's the meaning of scope here (ie named **scope)?** what's the benefits of using named scope? Now:- from Agile Development with Rails book:-- class ...

I have a simple parent object having many children. I'm trying to figure out how to use a named scope for bringing back just parents with specific numbers of children. Is this possible? class Foo...

I'm using will_paginate for pagination, which has been working well so far, except for this one thing. If I try to paginate a scope, for instance class User < ActiveRecord::Base named_scope ...

Is there a way to combine scopes in an additive fashion? If I have the scopes User.big_haired and User.plays_guitar I can call User.big_haired.plays_guitar and get all the users who have ...

I was wondering if there was a way to use "find_by_sql" within a named_scope. I'd like to treat custom sql as named_scope so I can chain it to my existing named_scopes. It would also be good for op...

I'm trying to create a named_scope that uses a join, but although the generated SQL looks right, the result are garbage. For example: class Clip < ActiveRecord::Base named_scope :visible, { ...