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module ActiveRecord
module Associations
class HasManyAssociation < AssociationCollection #:nodoc:
def initialize(owner, reflection)
super
construct_sql
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 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.quoted_table_name}.#{@reflection.options[:as]}_id = #{@owner.quoted_id} AND " +
"#{@reflection.quoted_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.quoted_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
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