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module ActiveRecord
module Associations
class HasManyAssociation < AssociationCollection #:nodoc:
def initialize(owner, reflection)
super
@conditions = sanitize_sql(reflection.options[:conditions])
construct_sql
end
def build(attributes = {})
if attributes.is_a?(Array)
attributes.collect { |attr| create(attr) }
else
load_target
record = @reflection.klass.new(attributes)
record[@reflection.primary_key_name] = @owner.id unless @owner.new_record?
@target << record
record
end
end
# DEPRECATED.
def find_all(runtime_conditions = nil, orderings = nil, limit = nil, joins = nil)
if @reflection.options[:finder_sql]
@reflection.klass.find_by_sql(@finder_sql)
else
conditions = @finder_sql
conditions += " AND (#{sanitize_sql(runtime_conditions)})" if runtime_conditions
orderings ||= @reflection.options[:order]
@reflection.klass.find_all(conditions, orderings, limit, joins)
end
end
# DEPRECATED. Find the first associated record. All arguments are optional.
def find_first(conditions = nil, orderings = nil)
find_all(conditions, orderings, 1).first
end
# Count the number of associated records. All arguments are optional.
def count(runtime_conditions = nil)
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
sql = @finder_sql
sql += " AND (#{sanitize_sql(runtime_conditions)})" if runtime_conditions
@reflection.klass.count(sql)
end
end
def find(*args)
options = Base.send(:extract_options_from_args!, args)
# 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
if ids.size == 1
id = ids.first
record = load_target.detect { |record| id == record.id }
expects_array? ? [record] : record
else
load_target.select { |record| ids.include?(record.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 method_missing(method, *args, &block)
if @target.respond_to?(method) || (!@reflection.klass.respond_to?(method) && Class.respond_to?(method))
super
else
@reflection.klass.with_scope(
:find => {
:conditions => @finder_sql,
:joins => @join_sql,
:readonly => false
},
:create => {
@reflection.primary_key_name => @owner.id
}
) do
@reflection.klass.send(method, *args, &block)
end
end
end
def find_target
if @reflection.options[:finder_sql]
@reflection.klass.find_by_sql(@finder_sql)
else
find(:all)
end
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(@counter_sql)
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)
record[@reflection.primary_key_name] = @owner.id
record.save
end
def delete_records(records)
if @reflection.options[:dependent]
records.each { |r| r.destroy }
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 = '#{ActiveRecord::Base.send(:class_name_of_active_record_descendant, @owner.class).to_s}'"
@finder_sql << " AND (#{interpolate_sql(@conditions)})" if @conditions
else
@finder_sql = "#{@reflection.klass.table_name}.#{@reflection.primary_key_name} = #{@owner.quoted_id}"
@finder_sql << " AND (#{interpolate_sql(@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
end
end
end
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