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Contents
module ActiveRecord
# = Active Record Has And Belongs To Many Association
module Associations
class HasAndBelongsToManyAssociation < CollectionAssociation #:nodoc:
attr_reader :join_table
def initialize(owner, reflection)
@join_table = Arel::Table.new(reflection.options[:join_table])
super
end
def insert_record(record, validate = true, raise = false)
if record.new_record?
if raise
record.save!(:validate => validate)
else
return unless record.save(:validate => validate)
end
end
if options[:insert_sql]
owner.connection.insert(interpolate(options[:insert_sql], record))
else
stmt = join_table.compile_insert(
join_table[reflection.foreign_key] => owner.id,
join_table[reflection.association_foreign_key] => record.id
)
owner.connection.insert stmt
end
record
end
# ActiveRecord::Relation#delete_all needs to support joins before we can use a
# SQL-only implementation.
alias delete_all_on_destroy delete_all
private
def count_records
load_target.size
end
def delete_records(records, method)
if sql = options[:delete_sql]
records = load_target if records == :all
records.each { |record| owner.connection.delete(interpolate(sql, record)) }
else
relation = join_table
stmt = relation.where(relation[reflection.foreign_key].eq(owner.id).
and(relation[reflection.association_foreign_key].in(records.map { |x| x.id }.compact))
).compile_delete
owner.connection.delete stmt
end
end
def invertible_for?(record)
false
end
end
end
end
Version data entries
85 entries across 71 versions & 13 rubygems