module ActiveFedora::SpawnMethods
Public Instance Methods
merge(other)
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Merges in the conditions from other
, if other
is an ActiveRecord::Relation
. Returns an array representing the intersection of the resulting records with other
, if other
is an array.
Post.where(published: true).joins(:comments).merge( Comment.where(spam: false) ) # Performs a single join query with both where conditions. recent_posts = Post.order('created_at DESC').first(5) Post.where(published: true).merge(recent_posts) # Returns the intersection of all published posts with the 5 most recently created posts. # (This is just an example. You'd probably want to do this with a single query!)
Procs will be evaluated by merge:
Post.where(published: true).merge(-> { joins(:comments) }) # => Post.where(published: true).joins(:comments)
This is mainly intended for sharing common conditions between multiple associations.
# File lib/active_fedora/relation/spawn_methods.rb, line 26 def merge(other) if other.is_a?(Array) to_a & other elsif other spawn.merge!(other) else self end end