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rails--rails/activerecord/test/models/organization.rb
Jon Leighton 0a12a5f816 Deprecate eager-evaluated scopes.
Don't use this:

    scope :red, where(color: 'red')
    default_scope where(color: 'red')

Use this:

    scope :red, -> { where(color: 'red') }
    default_scope { where(color: 'red') }

The former has numerous issues. It is a common newbie gotcha to do
the following:

    scope :recent, where(published_at: Time.now - 2.weeks)

Or a more subtle variant:

    scope :recent, -> { where(published_at: Time.now - 2.weeks) }
    scope :recent_red, recent.where(color: 'red')

Eager scopes are also very complex to implement within Active
Record, and there are still bugs. For example, the following does
not do what you expect:

    scope :remove_conditions, except(:where)
    where(...).remove_conditions # => still has conditions
2012-03-21 22:18:18 +00:00

12 lines
426 B
Ruby

class Organization < ActiveRecord::Base
has_many :member_details
has_many :members, :through => :member_details
has_many :authors, :primary_key => :name
has_many :author_essay_categories, :through => :authors, :source => :essay_categories
has_one :author, :primary_key => :name
has_one :author_owned_essay_category, :through => :author, :source => :owned_essay_category
scope :clubs, -> { from('clubs') }
end