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-rw-r--r--activerecord/lib/active_record/relation/calculations.rb8
1 files changed, 4 insertions, 4 deletions
diff --git a/activerecord/lib/active_record/relation/calculations.rb b/activerecord/lib/active_record/relation/calculations.rb
index 0f57e9831d..0d60810cd2 100644
--- a/activerecord/lib/active_record/relation/calculations.rb
+++ b/activerecord/lib/active_record/relation/calculations.rb
@@ -168,7 +168,7 @@ module ActiveRecord
# This method is designed to perform select by a single column as direct SQL query
# Returns <tt>Array</tt> with values of the specified column name
- # The values has same data type as column.
+ # The values has same data type as column.
#
# Examples:
#
@@ -177,9 +177,9 @@ module ActiveRecord
# Person.where(:confirmed => true).limit(5).pluck(:id)
#
def pluck(column_name)
- scope = self.select(column_name)
- self.connection.select_values(scope.to_sql).map! do |value|
- type_cast_using_column(value, column_for(column_name))
+ column_name = column_name.to_s
+ klass.connection.select_all(select(column_name).arel).map! do |attributes|
+ klass.type_cast_attribute(attributes.keys.first, klass.initialize_attributes(attributes))
end
end