Module: ActiveRecord::QueryMethods

Defined in:
lib/active_record/query_methods.rb

Instance Method Summary collapse

Instance Method Details

#build_arel_with_distinct_on(aliases = nil) ⇒ Object Also known as: build_arel 



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# File 'lib/active_record/query_methods.rb', line 27

def build_arel_with_distinct_on(aliases = nil)
  arel = build_arel_without_distinct_on(aliases)
  arel.distinct_on(self.distinct_on_values) if !self.distinct_on_values.empty?
  arel
end

#distinct_on(*fields) ⇒ Object Also known as: uniq_on 



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# File 'lib/active_record/query_methods.rb', line 15

def distinct_on(*fields)
  spawn.distinct_on!(*fields)
end

#distinct_on!(*fields) ⇒ Object Also known as: uniq_on! 



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# File 'lib/active_record/query_methods.rb', line 20

def distinct_on!(*fields)
  fields.flatten!
  self.distinct_on_values = fields.map { |x| x.is_a?(Arel::Attributes::Attribute) ? x : klass.arel_table[x] }
  self
end

#distinct_on_values ⇒ Object 



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# File 'lib/active_record/query_methods.rb', line 7

def distinct_on_values
  @values["distinct_on_values"] || []
end

#distinct_on_values=(value) ⇒ Object 



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# File 'lib/active_record/query_methods.rb', line 11

def distinct_on_values=(value)
  @values["distinct_on_values"] = value
end