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0a12a5f816
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
12 lines
426 B
Ruby
12 lines
426 B
Ruby
class Organization < ActiveRecord::Base
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has_many :member_details
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has_many :members, :through => :member_details
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has_many :authors, :primary_key => :name
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has_many :author_essay_categories, :through => :authors, :source => :essay_categories
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has_one :author, :primary_key => :name
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has_one :author_owned_essay_category, :through => :author, :source => :owned_essay_category
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scope :clubs, -> { from('clubs') }
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end
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