module Dynamoid::Associations::ManyAssociation
Attributes
Public Class Methods
Dynamoid::Associations::Association::new
# File lib/dynamoid/associations/many_association.rb, line 10 def initialize(*args) @query = {} super end
Public Instance Methods
Add an object or array of objects to an association. This preserves the current records in the association (if any) and adds the object to the target association if it is detected to exist.
@param [Dynamoid::Document] object the object (or array of objects) to add to the association
@return [Dynamoid::Document] the added object
@since 0.2.0
# File lib/dynamoid/associations/many_association.rb, line 69 def <<(object) source.update_attribute(source_attribute, source_ids.merge(Array(object).collect(&:id))) Array(object).each {|o| self.send(:associate_target, o)} if target_association object end
Is this array equal to the association's records?
@return [Boolean] true/false
@since 0.2.0
# File lib/dynamoid/associations/many_association.rb, line 157 def ==(other) records == Array(other) end
Create a new instance of the target class and add it directly to the association.
@param [Hash] attribute hash for the new object
@return [Dynamoid::Document] the newly-created object
@since 0.2.0
# File lib/dynamoid/associations/many_association.rb, line 107 def create(attributes = {}) self << target_class.create(attributes) end
Create a new instance of the target class and add it directly to the association. If the create fails an exception will be raised.
@param [Hash] attribute hash for the new object
@return [Dynamoid::Document] the newly-created object
@since 0.2.0
# File lib/dynamoid/associations/many_association.rb, line 96 def create!(attributes = {}) self << target_class.create!(attributes) end
Deletes an object or array of objects from the association. This removes their records from the association field on the source, and attempts to remove the source from the target association if it is detected to exist.
@param [Dynamoid::Document] object the object (or array of objects) to remove from the association
@return [Dynamoid::Document] the deleted object
@since 0.2.0
# File lib/dynamoid/associations/many_association.rb, line 54 def delete(object) source.update_attribute(source_attribute, source_ids - Array(object).collect(&:id)) Array(object).each {|o| self.send(:disassociate_target, o)} if target_association object end
Deletes all members of the association and removes them from the association.
@since 0.2.0
# File lib/dynamoid/associations/many_association.rb, line 134 def delete_all objs = target source.update_attribute(source_attribute, nil) objs.each(&:delete) end
Destroys all members of the association and removes them from the association.
@since 0.2.0
# File lib/dynamoid/associations/many_association.rb, line 125 def destroy_all objs = target source.update_attribute(source_attribute, nil) objs.each(&:destroy) end
Create a new instance of the target class and add it directly to the association. If the create fails an exception will be raised.
@param [Hash] attribute hash for the new object
@return [Dynamoid::Document] the newly-created object
@since 0.2.0
# File lib/dynamoid/associations/many_association.rb, line 118 def each(&block) records.each(&block) end
The records associated to the source.
@return the association records; depending on which association this is, either a single instance or an array
@since 0.2.0
# File lib/dynamoid/associations/many_association.rb, line 24 def find_target Array(target_class.find(source_ids.to_a)) end
Delegate include? to the records.
# File lib/dynamoid/associations/many_association.rb, line 42 def include?(object) records.include?(object) end
Delegate methods we don't find directly to the records array.
@since 0.2.0
# File lib/dynamoid/associations/many_association.rb, line 164 def method_missing(method, *args) if records.respond_to?(method) records.send(method, *args) else super end end
# File lib/dynamoid/associations/many_association.rb, line 28 def records if query.empty? target else results_with_query(target) end end
Replace an association with object or array of objects. This removes all of the existing associated records and replaces them with the passed object(s), and associates the target association if it is detected to exist.
@param [Dynamoid::Document] object the object (or array of objects) to add to the association
@return [Dynamoid::Document] the added object
@since 0.2.0
# File lib/dynamoid/associations/many_association.rb, line 83 def setter(object) target.each {|o| delete(o)} self << (object) object end
Naive association filtering.
@param [Hash] A hash of attributes; each must match every returned object's attribute exactly.
@return [Dynamoid::Association] the association this method was called on (for chaining purposes)
@since 0.2.0
# File lib/dynamoid/associations/many_association.rb, line 147 def where(args) args.each {|k, v| query[k] = v} self end
Private Instance Methods
If a query exists, filter all existing results based on that query.
@param [Array] results the raw results for the association
@return [Array] the filtered results for the query
@since 0.2.0
# File lib/dynamoid/associations/many_association.rb, line 181 def results_with_query(results) results.find_all do |result| query.all? do |attribute, value| result.send(attribute) == value end end end