diff options
Diffstat (limited to 'activerecord/lib/active_record/nested_attributes.rb')
-rw-r--r-- | activerecord/lib/active_record/nested_attributes.rb | 15 |
1 files changed, 14 insertions, 1 deletions
diff --git a/activerecord/lib/active_record/nested_attributes.rb b/activerecord/lib/active_record/nested_attributes.rb index 05c7e9713f..edcf547e01 100644 --- a/activerecord/lib/active_record/nested_attributes.rb +++ b/activerecord/lib/active_record/nested_attributes.rb @@ -3,6 +3,9 @@ require 'active_support/core_ext/object/try' module ActiveRecord module NestedAttributes #:nodoc: + class TooManyRecords < ActiveRecordError + end + extend ActiveSupport::Concern included do @@ -203,6 +206,12 @@ module ActiveRecord # do not have a <tt>_destroy</tt> value that evaluates to true. # Passing <tt>:all_blank</tt> instead of a Proc will create a proc # that will reject a record where all the attributes are blank. + # [:limit] + # Allows you to specify the maximum number of the associated records that + # can be processes with the nested attributes. If the size of the + # nested attributes array exceeds the specified limit, NestedAttributes::TooManyRecords + # exception is raised. If omitted, any number associations can be processed. + # Note that the :limit option is only applicable to one-to-many associations. # # Examples: # # creates avatar_attributes= @@ -214,7 +223,7 @@ module ActiveRecord def accepts_nested_attributes_for(*attr_names) options = { :allow_destroy => false } options.update(attr_names.extract_options!) - options.assert_valid_keys(:allow_destroy, :reject_if) + options.assert_valid_keys(:allow_destroy, :reject_if, :limit) attr_names.each do |association_name| if reflection = reflect_on_association(association_name) @@ -334,6 +343,10 @@ module ActiveRecord raise ArgumentError, "Hash or Array expected, got #{attributes_collection.class.name} (#{attributes_collection.inspect})" end + if options[:limit] && attributes_collection.size > options[:limit] + raise TooManyRecords, "Maximum #{options[:limit]} records are allowed. Got #{attributes_collection.size} records instead." + end + if attributes_collection.is_a? Hash attributes_collection = attributes_collection.sort_by { |index, _| index.to_i }.map { |_, attributes| attributes } end |