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require 'active_support/core_ext/object/blank'
require 'active_record/relation/merger'
module ActiveRecord
module SpawnMethods
def merge(other)
if other
case other
when Array
to_a & other
when Hash
Relation::HashMerger.new(clone, other).merge
else
Relation::Merger.new(clone, other).merge
end
else
self
end
end
# Removes from the query the condition(s) specified in +skips+.
#
# Example:
#
# Post.order('id asc').except(:order) # discards the order condition
# Post.where('id > 10').order('id asc').except(:where) # discards the where condition but keeps the order
#
def except(*skips)
result = self.class.new(@klass, table)
result.default_scoped = default_scoped
(Relation::MULTI_VALUE_METHODS - skips).each do |method|
result.send(:"#{method}_values=", send(:"#{method}_values"))
end
(Relation::SINGLE_VALUE_METHODS - skips).each do |method|
result.send(:"#{method}_value=", send(:"#{method}_value"))
end
# Apply scope extension modules
result.send(:apply_modules, extensions)
result
end
# Removes any condition from the query other than the one(s) specified in +onlies+.
#
# Example:
#
# Post.order('id asc').only(:where) # discards the order condition
# Post.order('id asc').only(:where, :order) # uses the specified order
#
def only(*onlies)
result = self.class.new(@klass, table)
result.default_scoped = default_scoped
(Relation::MULTI_VALUE_METHODS & onlies).each do |method|
result.send(:"#{method}_values=", send(:"#{method}_values"))
end
(Relation::SINGLE_VALUE_METHODS & onlies).each do |method|
result.send(:"#{method}_value=", send(:"#{method}_value"))
end
# Apply scope extension modules
result.send(:apply_modules, extensions)
result
end
end
end
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