module MassUpdater

# File lib/mass_updater.rb, line 29
def build_api_hash(relation, field, ids)
        hash = {}
        plucks = relation.where(["#{field} IN (?)", ids]).map{|c| [c.id, c.api_id]}
        plucks.each do |c|
                hash[c.last] = c.first
        end
        hash
end

# File lib/mass_updater.rb, line 19
        def insert_ignore(table_name, record_fields, inserts)
                if inserts.count > 0
                        update_sql = ""

                        sql = "INSERT IGNORE INTO #{table_name} (`#{record_fields.join('`, `')}`)
VALUES (#{inserts.join("),\n(")});"
                        ActiveRecord::Base.connection.execute(sql)
                end
        end

# File lib/mass_updater.rb, line 4
        def insert_or_update(table_name, record_fields, inserts, update_fields)
                if inserts.count > 0
                        update_sql = []
                        update_fields.each do |f|
                                update_sql << "#{f} = VALUES(#{f})"
                        end

                        sql = "INSERT INTO #{table_name} (`#{record_fields.join('`, `')}`)
VALUES (#{inserts.join("),\n(")})
ON DUPLICATE KEY UPDATE 
#{update_sql.join(", ")};"
                        ActiveRecord::Base.connection.execute(sql)
                end
        end