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document ActiveRecord's except and only

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Document methods that allow easily override arel queries
This commit is contained in:
Jordi Romero 2011-01-15 01:15:05 +01:00
parent da82b0a746
commit b31ef7ee83
1 changed files with 14 additions and 0 deletions
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14
activerecord/lib/active_record/relation/spawn_methods.rb
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@ -61,6 +61,13 @@ module ActiveRecord
alias :& :merge
# 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)
@ -75,6 +82,13 @@ module ActiveRecord
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)