method

pluck

v3.2.1 - Show latest stable - 0 notes - Class: ActiveRecord::Calculations

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What's this?

pluck(column_name) public

This method is designed to perform select by a single column as direct SQL query Returns Array with values of the specified column name The values has same data type as column.

Examples:

Person.pluck(:id) # SELECT people.id FROM people
Person.uniq.pluck(:role) # SELECT DISTINCT role FROM people
Person.where(:confirmed => true).limit(5).pluck(:id)

Show source

# File activerecord/lib/active_record/relation/calculations.rb, line 179
    def pluck(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

pluck

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