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tag: v0.9.4
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module ActiveRecord
module Associations
class HasManyAssociation < AssociationCollection #:nodoc:
def initialize(owner, association_name, association_class_name, association_class_primary_key_name, options)
super
@conditions = sanitize_sql(options[:conditions])
construct_sql
end
def build(attributes = {})
load_target
record = @association_class.new(attributes)
record[@association_class_primary_key_name] = @owner.id unless @owner.new_record?
@target << record
record
end
def find_all(runtime_conditions = nil, orderings = nil, limit = nil, joins = nil)
if @options[:finder_sql]
records = @association_class.find_by_sql(@finder_sql)
else
sql = @finder_sql
sql << " AND #{sanitize_sql(runtime_conditions)}" if runtime_conditions
orderings ||= @options[:order]
records = @association_class.find_all(sql, orderings, limit, joins)
end
end
# Count the number of associated records. All arguments are optional.
def count(runtime_conditions = nil)
if @options[:finder_sql]
@association_class.count_by_sql(@finder_sql)
else
sql = @finder_sql
sql << " AND #{sanitize_sql(runtime_conditions)}" if runtime_conditions
@association_class.count(sql)
end
end
# Find the first associated record. All arguments are optional.
def find_first(conditions = nil, orderings = nil)
find_all(conditions, orderings, 1).first
end
def find(*args)
# Return an Array if multiple ids are given.
expects_array = args.first.kind_of?(Array)
ids = args.flatten.compact.uniq
# If no ids given, raise RecordNotFound.
if ids.empty?
raise RecordNotFound, "Couldn't find #{@association_class.name} without an ID"
# If using a custom finder_sql, scan the entire collection.
elsif @options[:finder_sql]
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
# Otherwise, delegate to association class with conditions.
else
args << { :conditions => "#{@association_class_primary_key_name} = #{@owner.quoted_id} #{@conditions ? " AND " + @conditions : ""}" }
@association_class.find(*args)
end
end
# Removes all records from this association. Returns +self+ so
# method calls may be chained.
def clear
@association_class.update_all("#{@association_class_primary_key_name} = NULL", "#{@association_class_primary_key_name} = #{@owner.quoted_id}")
@target = []
self
end
protected
def find_target
find_all
end
def count_records
if has_cached_counter?
@owner.send(:read_attribute, cached_counter_attribute_name)
elsif @options[:counter_sql]
@association_class.count_by_sql(@counter_sql)
else
@association_class.count(@counter_sql)
end
end
def has_cached_counter?
@owner.attribute_present?(cached_counter_attribute_name)
end
def cached_counter_attribute_name
"#{@association_name}_count"
end
def insert_record(record)
record[@association_class_primary_key_name] = @owner.id
record.save
end
def delete_records(records)
ids = quoted_record_ids(records)
@association_class.update_all(
"#{@association_class_primary_key_name} = NULL",
"#{@association_class_primary_key_name} = #{@owner.quoted_id} AND #{@association_class.primary_key} IN (#{ids})"
)
end
def target_obsolete?
false
end
def construct_sql
if @options[:finder_sql]
@finder_sql = interpolate_sql(@options[:finder_sql])
else
@finder_sql = "#{@association_class_primary_key_name} = #{@owner.quoted_id}"
@finder_sql << " AND #{interpolate_sql(@conditions)}" if @conditions
end
if @options[:counter_sql]
@counter_sql = interpolate_sql(@options[:counter_sql])
elsif @options[:finder_sql]
@options[:counter_sql] = @options[:finder_sql].gsub(/SELECT (.*) FROM/i, "SELECT COUNT(*) FROM")
@counter_sql = interpolate_sql(@options[:counter_sql])
else
@counter_sql = "#{@association_class_primary_key_name} = #{@owner.quoted_id}"
@counter_sql << " AND #{interpolate_sql(@conditions)}" if @conditions
end
end
end
end
end
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