couchrest_model/lib/couchrest/model/casted_array.rb
Kostiantyn Kahanskyi 0bb00860d1 Casted array should notify changes on deletion
Otherwise there is no direct way to delete particular elements.

Workaround with assigning to another array without those elements
is pretty ugly.

* Should notify on deletion at a particular index (Array#delete_at)
* Should notify on deletion of a particular element (Array#delete)

Signed-off-by: Marcos Tapajós <tapajos@gmail.com>
2011-06-07 20:59:14 -03:00

84 lines
1.9 KiB
Ruby

#
# Wrapper around Array so that the casted_by attribute is set in all
# elements of the array.
#
module CouchRest::Model
class CastedArray < Array
include CouchRest::Model::CastedBy
include CouchRest::Model::Dirty
attr_accessor :casted_by_property
def initialize(array, property, parent = nil)
self.casted_by_property = property
self.casted_by = parent unless parent.nil?
super(array)
end
# Adding new entries
def << obj
super(instantiate_and_cast(obj))
end
def push(obj)
super(instantiate_and_cast(obj))
end
def unshift(obj)
super(instantiate_and_cast(obj))
end
def []= index, obj
value = instantiate_and_cast(obj, false)
couchrest_parent_will_change! if use_dirty? && value != self[index]
super(index, value)
end
def pop
couchrest_parent_will_change! if use_dirty? && self.length > 0
super
end
def shift
couchrest_parent_will_change! if use_dirty? && self.length > 0
super
end
def clear
couchrest_parent_will_change! if use_dirty? && self.length > 0
super
end
def delete(obj)
couchrest_parent_will_change! if use_dirty? && self.length > 0
super(obj)
end
def delete_at(index)
couchrest_parent_will_change! if use_dirty? && self.length > 0
super(index)
end
def build(*args)
obj = casted_by_property.build(*args)
self.push(obj)
obj
end
protected
def instantiate_and_cast(obj, change = true)
property = casted_by_property
couchrest_parent_will_change! if change && use_dirty?
if casted_by && property && obj.class != property.type_class
property.cast_value(casted_by, obj)
else
obj.casted_by = casted_by if obj.respond_to?(:casted_by)
obj.casted_by_property = casted_by_property if obj.respond_to?(:casted_by_property)
obj
end
end
end
end