module ActiveRecord module Associations class HasManyAssociation < AssociationCollection #:nodoc: def initialize(owner, reflection) super construct_sql end def build(attributes = {}) if attributes.is_a?(Array) attributes.collect { |attr| build(attr) } else build_record(attributes) { |record| set_belongs_to_association_for(record) } end end # Count the number of associated records. All arguments are optional. def count(*args) if @reflection.options[:counter_sql] @reflection.klass.count_by_sql(@counter_sql) elsif @reflection.options[:finder_sql] @reflection.klass.count_by_sql(@finder_sql) else column_name, options = @reflection.klass.send(:construct_count_options_from_args, *args) options[:conditions] = options[:conditions].nil? ? @finder_sql : @finder_sql + " AND (#{sanitize_sql(options[:conditions])})" options[:include] ||= @reflection.options[:include] @reflection.klass.count(column_name, options) end end def find(*args) options = args.extract_options! # If using a custom finder_sql, scan the entire collection. if @reflection.options[:finder_sql] expects_array = args.first.kind_of?(Array) ids = args.flatten.compact.uniq.map(&:to_i) if ids.size == 1 id = ids.first record = load_target.detect { |r| id == r.id } expects_array ? [ record ] : record else load_target.select { |r| ids.include?(r.id) } end else conditions = "#{@finder_sql}" if sanitized_conditions = sanitize_sql(options[:conditions]) conditions << " AND (#{sanitized_conditions})" end options[:conditions] = conditions if options[:order] && @reflection.options[:order] options[:order] = "#{options[:order]}, #{@reflection.options[:order]}" elsif @reflection.options[:order] options[:order] = @reflection.options[:order] end merge_options_from_reflection!(options) # Pass through args exactly as we received them. args << options @reflection.klass.find(*args) end end protected def load_target if !@owner.new_record? || foreign_key_present begin if !loaded? if @target.is_a?(Array) && @target.any? @target = (find_target + @target).uniq else @target = find_target end end rescue ActiveRecord::RecordNotFound reset end end loaded if target target end def count_records count = if has_cached_counter? @owner.send(:read_attribute, cached_counter_attribute_name) elsif @reflection.options[:counter_sql] @reflection.klass.count_by_sql(@counter_sql) else @reflection.klass.count(:conditions => @counter_sql, :include => @reflection.options[:include]) end @target = [] and loaded if count == 0 if @reflection.options[:limit] count = [ @reflection.options[:limit], count ].min end return count end def has_cached_counter? @owner.attribute_present?(cached_counter_attribute_name) end def cached_counter_attribute_name "#{@reflection.name}_count" end def insert_record(record) set_belongs_to_association_for(record) record.save end def delete_records(records) case @reflection.options[:dependent] when :destroy records.each(&:destroy) when :delete_all @reflection.klass.delete(records.map(&:id)) else ids = quoted_record_ids(records) @reflection.klass.update_all( "#{@reflection.primary_key_name} = NULL", "#{@reflection.primary_key_name} = #{@owner.quoted_id} AND #{@reflection.klass.primary_key} IN (#{ids})" ) end end def target_obsolete? false end def construct_sql case when @reflection.options[:finder_sql] @finder_sql = interpolate_sql(@reflection.options[:finder_sql]) when @reflection.options[:as] @finder_sql = "#{@reflection.klass.table_name}.#{@reflection.options[:as]}_id = #{@owner.quoted_id} AND " + "#{@reflection.klass.table_name}.#{@reflection.options[:as]}_type = #{@owner.class.quote_value(@owner.class.base_class.name.to_s)}" @finder_sql << " AND (#{conditions})" if conditions else @finder_sql = "#{@reflection.klass.table_name}.#{@reflection.primary_key_name} = #{@owner.quoted_id}" @finder_sql << " AND (#{conditions})" if conditions end if @reflection.options[:counter_sql] @counter_sql = interpolate_sql(@reflection.options[:counter_sql]) elsif @reflection.options[:finder_sql] # replace the SELECT clause with COUNT(*), preserving any hints within /* ... */ @reflection.options[:counter_sql] = @reflection.options[:finder_sql].sub(/SELECT (\/\*.*?\*\/ )?(.*)\bFROM\b/im) { "SELECT #{$1}COUNT(*) FROM" } @counter_sql = interpolate_sql(@reflection.options[:counter_sql]) else @counter_sql = @finder_sql end end def construct_scope create_scoping = {} set_belongs_to_association_for(create_scoping) { :find => { :conditions => @finder_sql, :readonly => false, :order => @reflection.options[:order], :limit => @reflection.options[:limit] }, :create => create_scoping } end end end end