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rollback to previous has_many_polymorphs version. upgrading had issues.

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git-svn-id: http://www.rousette.org.uk/svn/tracks-repos/trunk@468 a4c988fc-2ded-0310-b66e-134b36920a42
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lukemelia 2007-02-28 07:00:53 +00:00
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tracks/vendor/plugins/has_many_polymorphs/README vendored Normal file
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Self-referential, polymorphic has_many :through helper
Copyright 2006 Evan Weaver (see the LICENSE file)
"model :parent_class" may be required in some controllers or perhaps models in order for reloading to work properly, since the parent setup must be executed on the child every time the child class is reloaded.
Usage and help:
http://blog.evanweaver.com/articles/2006/06/02/has_many_polymorphs
Also see the source code, although it's probably not going to be super helpful to you.
Changelog:
22. api change; prefix on methods is now singular when using :rename_individual_collections
21. add configuration option to cache polymorphic classes in development mode
20. collection methods (push, delete, clear) now on individual collections
19.2. disjoint collection sides bugfix, don't raise on new records
19.1. double classify bugfix
19. large changes to properly support double polymorphism
18.2. bugfix to make sure the type gets checked on doubly polymorphic parents
18.1. bugfix for sqlite3 child attribute retrieval
18. bugfix for instantiating attributes of namespaced models
17.1. bugfix for double polymorphic relationships
17. double polymorphic relationships (includes new API method)
16. namespaced model support
15. bugfix for postgres and mysql under 1.1.6; refactored tests (thanks hildofur); properly handles legacy table names set with set_table_name()
14. sti support added (use the child class names, not the base class)
13. bug regarding table names with underscores in SQL query fixed
12.1. license change
12. file_column bug fixed
11. tests written; after_find and after_initialize now correctly called
10. bugfix
9. rollback
8. SQL performance enhancements added
7. rewrote singletons as full-fledged proxy class so that marshalling works (e.g. in the session)
6. caching added
5. fixed dependency reloading problem in development mode
4. license change
3. added :dependent support on the join table
1-2. no changelog
Known problems:
1. Plugin's test fixtures do not load properly for non-edge postgres, invalidating the tests.
2. quote_value() hack is stupid.

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require 'has_many_polymorphs'

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# self-referential, polymorphic has_many :through plugin
# http://blog.evanweaver.com/articles/2006/06/02/has_many_polymorphs
# operates via magic dust, and courage
if defined? Rails::Configuration
class Rails::Configuration
def has_many_polymorphs_cache_classes= *args
::ActiveRecord::Associations::ClassMethods.has_many_polymorphs_cache_classes = *args
end
end
end
module ActiveRecord
if ENV['RAILS_ENV'] =~ /development|test/ and ENV['USER'] == 'eweaver'
# enable this condition to get awesome association debugging
# you will get a folder "generated_models" in the current dir containing valid Ruby files
# explaining all ActiveRecord relationships set up by the plugin, as well as listing the
# line in the plugin that made each particular macro call
class << Base
COLLECTION_METHODS = [:belongs_to, :has_many, :has_and_belongs_to_many, :has_one].each do |method_name|
alias_method "original_#{method_name}".to_sym, method_name
undef_method method_name
end
unless defined? GENERATED_CODE_DIR
# automatic code generation for debugging... bitches
GENERATED_CODE_DIR = "generated_models"
system "rm -rf #{GENERATED_CODE_DIR}"
Dir.mkdir GENERATED_CODE_DIR
alias :original_method_missing :method_missing
def method_missing(method_name, *args, &block)
if COLLECTION_METHODS.include? method_name.to_sym
Dir.chdir GENERATED_CODE_DIR do
filename = "#{ActiveRecord::Associations::ClassMethods.demodulate(self.name.underscore)}.rb"
contents = File.open(filename).read rescue "\nclass #{self.name}\n\nend\n"
line = caller[1][/\:(\d+)\:/, 1]
contents[-5..-5] = "\n #{method_name} #{args[0..-2].inspect[1..-2]},\n #{args[-1].inspect[1..-2].gsub(" :", "\n :").gsub("=>", " => ")}\n#{ block ? " #{block.inspect.sub(/\@.*\//, '@')}\n" : ""} # called from line #{line}\n\n"
File.open(filename, "w") do |file|
file.puts contents
end
end
# doesn't handle blocks
self.send("original_#{method_name}", *args, &block)
else
self.send(:original_method_missing, method_name, *args, &block)
end
end
end
end
# and we want to track the reloader's shenanigans
(::Dependencies.log_activity = true) rescue nil
end
module Associations
module ClassMethods
mattr_accessor :has_many_polymorphs_cache_classes
def acts_as_double_polymorphic_join opts
raise RuntimeError, "Couldn't understand #{opts.inspect} options in acts_as_double_polymorphic_join. Please only specify the two relationships and their member classes; there are no options to set. " unless opts.length == 2
join_name = self.name.tableize.to_sym
opts.each do |polymorphs, children|
parent_hash_key = (opts.keys - [polymorphs]).first # parents are the entries in the _other_ children array
begin
parent_foreign_key = self.reflect_on_association(parent_hash_key.to_s.singularize.to_sym).primary_key_name
rescue NoMethodError
raise RuntimeError, "Couldn't find 'belongs_to' association for :#{parent_hash_key.to_s.singularize} in #{self.name}." unless parent_foreign_key
end
parents = opts[parent_hash_key]
conflicts = (children & parents) # set intersection
parents.each do |parent_name|
parent_class = parent_name.to_s.classify.constantize
reverse_polymorph = parent_hash_key.to_s.singularize
polymorph = polymorphs.to_s.singularize
parent_class.send(:has_many_polymorphs,
polymorphs, {:double => true,
:from => children,
:as => parent_hash_key.to_s.singularize.to_sym,
:through => join_name,
:dependent => :destroy,
:foreign_key => parent_foreign_key,
:foreign_type_key => parent_foreign_key.to_s.sub(/_id$/, '_type'),
:reverse_polymorph => reverse_polymorph,
:conflicts => conflicts,
:rename_individual_collections => false})
if conflicts.include? parent_name
# unify the alternate sides of the conflicting children
(conflicts).each do |method_name|
unless parent_class.instance_methods.include?(method_name)
parent_class.send(:define_method, method_name) do
(self.send("#{reverse_polymorph}_#{method_name}") +
self.send("#{polymorph}_#{method_name}")).freeze
end
end
end
# unify the join model
unless parent_class.instance_methods.include?(join_name)
parent_class.send(:define_method, join_name) do
(self.send("#{join_name}_as_#{reverse_polymorph}") +
self.send("#{join_name}_as_#{polymorph}")).freeze
end
end
end
end
end
end
def has_many_polymorphs(polymorphs, options, &block)
options.assert_valid_keys(:from, :acts_as, :as, :through, :foreign_key, :dependent, :double,
:rename_individual_collections, :foreign_type_key, :reverse_polymorph, :conflicts)
# the way this deals with extra parameters to the associations could use some work
options[:as] ||= options[:acts_as] ||= self.table_name.singularize.to_sym
# foreign keys follow the table name, not the class name in Rails 2.0
options[:foreign_key] ||= "#{options[:as].to_s}_id"
# no conflicts by default
options[:conflicts] ||= []
# construct the join table name
options[:through] ||= join_table((options[:as].to_s.pluralize or self.table_name), polymorphs)
if options[:reverse_polymorph]
options[:through_with_reverse_polymorph] = "#{options[:through]}_as_#{options[:reverse_polymorph]}".to_sym
else
options[:through_with_reverse_polymorph] = options[:through]
end
options[:join_class_name] ||= options[:through].to_s.classify
# the class must have_many on the join_table
opts = {:foreign_key => options[:foreign_key], :dependent => options[:dependent],
:class_name => options[:join_class_name]}
if options[:foreign_type_key]
opts[:conditions] = "#{options[:foreign_type_key]} = #{quote_value self.base_class.name}"
end
has_many demodulate(options[:through_with_reverse_polymorph]), opts
polymorph = polymorphs.to_s.singularize.to_sym
# add the base_class method to the join_table so that STI will work transparently
inject_before_save_into_join_table(options[:join_class_name], polymorph)
# get some reusable info
children, child_associations = {}, {}
options[:from].each do |child_plural|
children[child_plural] = child_plural.to_s.singularize.to_sym
child_associations[child_plural] = (options[:rename_individual_collections] ? "#{polymorph}_#{child_plural}".to_sym : child_plural)
end
# get our models out of the reloadable lists, if requested
if self.has_many_polymorphs_cache_classes
klasses = [self.name, options[:join_class_name], *children.values.map{|x| x.to_s.classify}]
klasses += basify_sti_classnames(klasses).keys.to_a.compact.uniq.map{|x| x.to_s.classify}
klasses.uniq!
klasses.each {|s| logger.debug "Ejecting #{s.inspect} from the autoload lists"}
begin
Dependencies.autoloaded_constants -= klasses
Dependencies.explicitly_unloadable_constants -= klasses
rescue NoMethodError
raise "Rails 1.2.0 or later is required to set config.has_many_polymorphs_cache_classes = true"
end
end
# auto-inject individually named associations for the children into the join model
create_virtual_associations_for_join_to_individual_children(children, polymorph, options)
# iterate through the polymorphic children, running the parent class's :has_many on each one
create_has_many_through_associations_for_parent_to_children(children, child_associations, polymorphs, polymorph, options)
# auto-inject the regular polymorphic associations into the child classes
create_has_many_through_associations_for_children_to_parent(children, polymorph, options)
create_general_collection_association_for_parent(polymorphs, polymorph, basify_sti_classnames(children), options, &block)
end
def self.demodulate(s)
s.to_s.gsub('/', '_').to_sym
end
protected
def demodulate(s)
ActiveRecord::Associations::ClassMethods.demodulate(s)
end
def basify_sti_classnames(hash)
# this blows
result = {}
hash.each do |plural, singular|
klass = plural.to_s.classify.constantize
if klass != klass.base_class
result[klass.base_class.table_name.to_sym] = klass.base_class.table_name.singularize.to_sym
else
result[plural] = singular
end
end
result
end
def inject_before_save_into_join_table(join_class_name, polymorph)
sti_hook = "sti_class_rewrite"
rewrite_procedure = %[
self.send(:#{polymorph}_type=, self.#{polymorph}_type.constantize.base_class.name)
]
# this also blows, and should be abstracted. alias_method_chain is not enough.
join_class_name.constantize.class_eval %[
unless instance_methods.include? "before_save_with_#{sti_hook}"
if instance_methods.include? "before_save"
alias_method :before_save_without_#{sti_hook}, :before_save
def before_save_with_#{sti_hook}
before_save_without_#{sti_hook}
#{rewrite_procedure}
end
else
def before_save_with_#{sti_hook}
#{rewrite_procedure}
end
end
alias_method :before_save, :before_save_with_#{sti_hook}
end
]
end
def create_virtual_associations_for_join_to_individual_children(children, polymorph, options)
children.each do |child_plural, child|
options[:join_class_name].constantize.instance_eval do
association_name = child.to_s
association_name += "_as_#{polymorph}" if options[:conflicts].include?(child_plural)
association = demodulate(association_name)
opts = {:class_name => child.to_s.classify,
:foreign_key => "#{polymorph}_id" }
unless self.reflect_on_all_associations.map(&:name).include? association
belongs_to association, opts
end
end
end
end
def create_has_many_through_associations_for_children_to_parent(children, polymorph, options)
children.each do |child_plural, child|
if child == options[:as]
raise RuntimeError, "You can't have a self-referential polymorphic has_many :through without renaming the non-polymorphic foreign key in the join model."
end
parent = self
child.to_s.classify.constantize.instance_eval do
# this shouldn't be called at all during doubles; there is no way to traverse to a
# double polymorphic parent (XXX is that right?)
unless options[:double] or options[:conflicts].include? self.name.tableize.to_sym
begin
require_dependency parent.name.underscore # XXX why is this here?
rescue MissingSourceFile
end
# the join table
through = demodulate(options[:through_with_reverse_polymorph]).to_s
through += "_as_child" if parent == self
through = through.to_sym
has_many through, :as => polymorph,
:class_name => options[:through].to_s.classify,
:dependent => options[:dependent]
association = options[:as].to_s.pluralize
association += "_of_#{polymorph.to_s.pluralize}" if options[:rename_individual_collections] # XXX check this
# the polymorphic parent association
has_many association.to_sym, :through => through,
:class_name => parent.name,
:source => options[:as],
:foreign_key => options[:foreign_key]
end
end
end
end
def create_has_many_through_associations_for_parent_to_children(children, child_associations, polymorphs, polymorph, options)
children.each do |child_plural, child|
#puts ":source => #{child}"
association = demodulate(child_associations[child_plural]).to_s
source = demodulate(child).to_s
if options[:conflicts].include? child_plural
# XXX what?
association = "#{polymorph}_#{association}" if options[:conflicts].include? self.name.tableize.to_sym
source += "_as_#{polymorph}"
end
# activerecord is broken when you try to anonymously extend an association in a namespaced model,
extension = self.class_eval %[
module #{association.classify + "AssociationExtension"}
def push *args
proxy_owner.send(:#{polymorphs}).send(:push, *args).select{|x| x.is_a? #{child.to_s.classify}}
end
alias :<< :push
def delete *args
proxy_owner.send(:#{polymorphs}).send(:delete, *args)
end
def clear
proxy_owner.send(:#{polymorphs}).send(:clear, #{child.to_s.classify})
end
self # required
end]
has_many association.to_sym, :through => demodulate(options[:through_with_reverse_polymorph]),
:source => source.to_sym,
:conditions => ["#{options[:join_class_name].constantize.table_name}.#{polymorph}_type = ?", child.to_s.classify.constantize.base_class.name],
:extend => extension
end
end
def create_general_collection_association_for_parent(collection_name, polymorph, children, options, &block)
# we need to explicitly rename all the columns because we are fetching all the children objects at once.
# if multiple objects have a 'title' column, for instance, there will be a collision and we will potentially
# lose data. if we alias the fields and then break them up later, there are no collisions.
join_model = options[:through].to_s.classify.constantize
# figure out what fields we wanna grab
select_fields = []
children.each do |plural, singular|
klass = plural.to_s.classify.constantize
klass.columns.map(&:name).each do |name|
select_fields << "#{klass.table_name}.#{name} as #{demodulate plural}_#{name}"
end
end
# now get the join model fields
join_model.columns.map(&:name).each do |name|
select_fields << "#{join_model.table_name}.#{name} as #{join_model.table_name}_#{name}"
end
from_table = self.table_name
left_joins = children.keys.map do |n|
klass = n.to_s.classify.constantize
"LEFT JOIN #{klass.table_name} ON #{join_model.table_name}.#{polymorph}_id = #{klass.table_name}.#{klass.primary_key} AND #{join_model.table_name}.#{polymorph}_type = '#{n.to_s.classify}'"
end
sql_query = 'SELECT ' + select_fields.join(', ') + " FROM #{join_model.table_name}" +
"\nJOIN #{from_table} as polymorphic_parent ON #{join_model.table_name}.#{options[:foreign_key]} = polymorphic_parent.#{self.primary_key}\n" +
left_joins.join("\n") + "\nWHERE "
if options[:foreign_type_key]
sql_query +="#{join_model.table_name}.#{options[:foreign_type_key]} = #{quote_value self.base_class.name} AND "
end
# for sqlite3 you have to reference the left-most table in WHERE clauses or rows with NULL
# join results sometimes get silently dropped. it's stupid.
sql_query += "#{join_model.table_name}.#{options[:foreign_key]} "
#puts("Built collection property query:\n #{sql_query}")
class_eval do
attr_accessor "#{collection_name}_cache"
cattr_accessor "#{collection_name}_options"
define_method(collection_name) do
if collection_name_cache = instance_variable_get("@#{collection_name}_cache")
#puts("Cache hit on #{collection_name}")
collection_name_cache
else
#puts("Cache miss on #{collection_name}")
rows = connection.select_all("#{sql_query}" + (new_record? ? "IS NULL" : "= #{self.id}"))
# this gives us a hash with keys for each object type
objectified = objectify_polymorphic_array(rows, "#{join_model}", "#{polymorph}_type")
# locally cache the different object types found
# this doesn't work... yet.
objectified.each do |key, array|
instance_variable_set("@#{ActiveRecord::Associations::ClassMethods.demodulate(key)}", array)
end
proxy_object = HasManyPolymorphsProxyCollection.new(objectified[:all], self, send("#{collection_name}_options"))
(class << proxy_object; self end).send(:class_eval, &block) if block_given?
instance_variable_set("@#{collection_name}_cache", proxy_object)
end
end
# in order not to break tests, see if we have been defined already
unless instance_methods.include? "reload_with_#{collection_name}"
define_method("reload_with_#{collection_name}") do
send("reload_without_#{collection_name}")
instance_variable_set("@#{collection_name}_cache", nil)
self
end
alias_method "reload_without_#{collection_name}", :reload
alias_method :reload, "reload_with_#{collection_name}"
end
end
send("#{collection_name}_options=",
options.merge(:collection_name => collection_name,
:type_key => "#{polymorph}_type",
:id_key => "#{polymorph}_id"))
# puts("Defined the collection proxy.\n#{collection_name}\n")
end
def join_table(a, b)
[a.to_s, b.to_s].sort.join("_").to_sym
end
unless self.respond_to? :quote_value
# hack it in (very badly) for Rails 1.1.6 people
def quote_value s
"'#{s.inspect[1..-2]}'"
end
end
end
################################################
# decided to leave this alone unless it becomes clear that there is some benefit
# in deriving from AssociationProxy
#
# the benefit would be custom finders on the collection, perhaps...
class HasManyPolymorphsProxyCollection < Array
alias :array_delete :delete
alias :array_push :push
alias :count :length
def initialize(contents, parent, options)
@parent = parent
@options = options
@join_class = options[:join_class_name].constantize
return if contents.blank?
super(contents)
end
def push(objs, args={})
objs = [objs] unless objs.is_a? Array
objs.each do |obj|
data = {@options[:foreign_key] => @parent.id,
@options[:type_key] => obj.class.base_class.to_s, @options[:id_key] => obj.id}
data.merge!({@options[:foreign_type_key] => @parent.class.base_class.to_s}) if @options[:foreign_type_key] # for double polymorphs
conditions_string = data.keys.map(&:to_s).push("").join(" = ? AND ")[0..-6]
if @join_class.find(:first, :conditions => [conditions_string] + data.values).blank?
@join_class.new(data).save!
end
end
if args[:reload]
reload
else
# we have to do this funky stuff instead of just array difference because +/.uniq returns a regular array,
# which doesn't have our special methods and configuration anymore
unless (difference = objs - collection).blank?
@parent.send("#{@options[:collection_name]}_cache=".to_sym, collection.array_push(*difference))
end
end
@parent.send(@options[:collection_name])
end
alias :<< :push
def delete(objs, args={})
if objs
objs = [objs] unless objs.is_a? Array
elsif args[:clear]
objs = collection
objs = objs.select{|obj| obj.is_a? args[:klass]} if args[:klass]
else
raise RuntimeError, "Invalid delete parameters (has_many_polymorphs)."
end
records = []
objs.each do |obj|
records += join_records.select do |record|
record.send(@options[:type_key]) == obj.class.base_class.to_s and
record.send(@options[:id_key]) == obj.id
end
end
reload if args[:reload]
unless records.blank?
records.map(&:destroy)
# XXX could be faster if we reversed the loops
deleted_items = collection.select do |item|
records.select {|join_record|
join_record.send(@options[:type_key]) == item.class.base_class.name and
join_record.send(@options[:id_key]) == item.id
}.length > 0
end
# keep the cache fresh, while we're at it. see comment in .push
deleted_items.each { |item| collection.array_delete(item) }
@parent.send("#{@options[:collection_name]}_cache=", collection)
return deleted_items unless deleted_items.empty?
end
nil
end
def clear(klass = nil)
result = delete(nil, :clear => true, :klass => klass)
return result if result
collection
end
def reload
# reset the cache, postponing reloading from the db until we really need it
@parent.reload
end
private
def join_records
@parent.send(ActiveRecord::Associations::ClassMethods.demodulate(@options[:through]))
end
def collection
@parent.send(@options[:collection_name])
end
end
end
class Base
# turns an array of hashes (db rows) into a hash consisting of :all (array of everything) and
# a hash key for each class type it finds, e.g. :posts and :comments
private
def objectify_polymorphic_array(array, join_model, type_field)
join_model = join_model.constantize
arrays_hash = {}
array.each do |element|
klass = element["#{join_model.table_name}_#{type_field}"].constantize
association = ActiveRecord::Associations::ClassMethods.demodulate(klass.name.pluralize.underscore.downcase)
hash = {}
# puts "Class #{klass.inspect}"
# puts "Association name: #{association.inspect}"
element.each do |key, value|
# puts "key #{key} - value #{value.inspect}"
if key =~ /^#{association}_(.+)/
hash[$1] = value
# puts "#{$1.inspect} assigned #{value.inspect}"
end
end
object = klass.instantiate(hash)
arrays_hash[:all] ||= []
arrays_hash[association] ||= []
arrays_hash[:all] << object
arrays_hash[association] << object
end
arrays_hash
end
end
end
#require 'ruby-debug'
#Debugger.start

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swimmy:
id: 1
name: Swimmy
speed: 10
jaws:
id: 2
name: Jaws
speed: 20

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shamu:
id: 1
name: Shamu

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rover:
id: 1
name: Rover
spot:
id: 2
name: Spot

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chloe:
id: 1
cat_type: Kitten
name: Chloe
alice:
id: 2
cat_type: Kitten
name: Alice

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froggy:
id: 1
name: Froggy

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kibbles:
the_petfood_primary_key: 1
name: Kibbles
bits:
the_petfood_primary_key: 2
name: Bits

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puma:
id: 1
name: Puma
jacrazy:
id: 2
name: Jacrazy

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class Aquatic::Fish < ActiveRecord::Base
# attr_accessor :after_find_test, :after_initialize_test
end

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class Aquatic::PupilsWhale < ActiveRecord::Base
set_table_name "little_whale_pupils"
belongs_to :whale, :class_name => "Aquatic::Whale", :foreign_key => "whale_id"
belongs_to :aquatic_pupil, :polymorphic => true
end

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# see http://dev.rubyonrails.org/ticket/5935
module Aquatic; end
require 'aquatic/fish'
require 'aquatic/pupils_whale'
class Aquatic::Whale < ActiveRecord::Base
has_many_polymorphs(:aquatic_pupils, :from => [:dogs, :"aquatic/fish"],
:through => "aquatic/pupils_whales") do
def blow; "result"; end
end
end

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class BeautifulFightRelationship < ActiveRecord::Base
set_table_name 'keep_your_enemies_close'
belongs_to :enemy, :polymorphic => true
belongs_to :protector, :polymorphic => true
# polymorphic relationships with column names different from the relationship name
# are not supported by Rails
acts_as_double_polymorphic_join :enemies => [:dogs, :kittens, :frogs],
:protectors => [:wild_boars, :kittens, :"aquatic/fish", :dogs]
end

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class Cat < ActiveRecord::Base
# STI base class
self.inheritance_column = 'cat_type'
end

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class Dog < ActiveRecord::Base
attr_accessor :after_find_test, :after_initialize_test
set_table_name "bow_wows"
def after_find
@after_find_test = true
# puts "After find called on #{name}."
end
def after_initialize
@after_initialize_test = true
end
end

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class EatersFoodstuff < ActiveRecord::Base
belongs_to :foodstuff, :class_name => "Petfood", :foreign_key => "foodstuff_id"
belongs_to :eater, :polymorphic => true
def before_save
self.some_attribute = 3
end
end

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class Frog < ActiveRecord::Base
end

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class Kitten < Cat
# has_many :eaters_parents, :dependent => true, :as => 'eater'
end

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# see http://dev.rubyonrails.org/ticket/5935
require 'eaters_foodstuff'
require 'petfood'
require 'cat'
module Aquatic; end
require 'aquatic/fish'
require 'dog'
require 'wild_boar'
require 'kitten'
require 'tabby'
class Petfood < ActiveRecord::Base
set_primary_key 'the_petfood_primary_key'
has_many_polymorphs :eaters,
:from => [:dogs, :petfoods, :wild_boars, :kittens,
:tabbies, :"aquatic/fish"],
:dependent => :destroy,
:rename_individual_collections => true,
:acts_as => :foodstuff,
:foreign_key => "foodstuff_id"
end

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class Tabby < Cat
end

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class WildBoar < ActiveRecord::Base
end

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ActiveRecord::Schema.define(:version => 0) do
create_table :petfoods, :force => true, :primary_key => :the_petfood_primary_key do |t|
t.column :name, :string
end
create_table :bow_wows, :force => true do |t|
t.column :name, :string
end
create_table :cats, :force => true do |t|
t.column :name, :string
t.column :cat_type, :string
end
create_table :frogs, :force => true do |t|
t.column :name, :string
end
create_table :wild_boars, :force => true do |t|
t.column :name, :string
end
create_table :eaters_foodstuffs, :force => true do |t|
t.column :foodstuff_id, :integer
t.column :eater_id, :integer
t.column :some_attribute, :integer, :default => 0
t.column :eater_type, :string
end
create_table :fish, :force => true do |t|
t.column :name, :string
t.column :speed, :integer
end
create_table :whales, :force => true do |t|
t.column :name, :string
end
create_table :little_whale_pupils, :force => true do |t|
t.column :whale_id, :integer
t.column :aquatic_pupil_id, :integer
t.column :aquatic_pupil_type, :string
end
create_table :keep_your_enemies_close, :force => true do |t|
t.column :enemy_id, :integer
t.column :enemy_type, :string
t.column :protector_id, :integer
t.column :protector_type, :string
end
end

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require 'pathname'
# default test helper
begin
require File.dirname(__FILE__) + '/../../../../test/test_helper'
rescue LoadError
require '~/projects/miscellaneous/cookbook/test/test_helper'
end
Inflector.inflections {|i| i.irregular 'fish', 'fish' }
# fixtures
$LOAD_PATH.unshift(Test::Unit::TestCase.fixture_path = File.dirname(__FILE__) + "/fixtures/")
# models
$LOAD_PATH.unshift("#{Pathname.new(__FILE__).dirname.to_s}/models")
class Test::Unit::TestCase
self.use_transactional_fixtures = true # must stay true for tests to run on postgres or sqlite3
self.use_instantiated_fixtures = false
end
# test schema
load(File.dirname(__FILE__) + "/schema.rb")

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require File.dirname(__FILE__) + '/../test_helper'
class PolymorphTest < Test::Unit::TestCase
fixtures :cats, :bow_wows, :frogs, :wild_boars, :eaters_foodstuffs, :petfoods,
:"aquatic/fish", :"aquatic/whales", :"aquatic/little_whale_pupils",
:keep_your_enemies_close
require 'beautiful_fight_relationship'
# to-do: finder queries on the collection
# order-mask column on the join table for polymorphic order
# rework load order so you could push and pop without ever loading the whole collection
# so that limit works in a sane way
def setup
@kibbles = Petfood.find(1)
@bits = Petfood.find(2)
@shamu = Aquatic::Whale.find(1)
@swimmy = Aquatic::Fish.find(1)
@rover = Dog.find(1)
@spot = Dog.find(2)
@puma = WildBoar.find(1)
@chloe = Kitten.find(1)
@alice = Kitten.find(2)
@froggy = Frog.find(1)
@join_count = EatersFoodstuff.count
@l = @kibbles.eaters.length
@m = @bits.eaters.count
end
def test_all_relationship_validities
# q = []
# ObjectSpace.each_object(Class){|c| q << c if c.ancestors.include? ActiveRecord::Base }
# q.each{|c| puts "#{c.name}.reflect_on_all_associations.map &:check_validity! "}
Petfood.reflect_on_all_associations.map &:check_validity!
Tabby.reflect_on_all_associations.map &:check_validity!
Kitten.reflect_on_all_associations.map &:check_validity!
Dog.reflect_on_all_associations.map &:check_validity!
Aquatic::Fish.reflect_on_all_associations.map &:check_validity!
EatersFoodstuff.reflect_on_all_associations.map &:check_validity!
WildBoar.reflect_on_all_associations.map &:check_validity!
Frog.reflect_on_all_associations.map &:check_validity!
Aquatic::Whale.reflect_on_all_associations.map &:check_validity!
Cat.reflect_on_all_associations.map &:check_validity!
Aquatic::PupilsWhale.reflect_on_all_associations.map &:check_validity!
BeautifulFightRelationship.reflect_on_all_associations.map &:check_validity!
end
def test_assignment
assert @kibbles.eaters.blank?
assert @kibbles.eaters.push(Cat.find_by_name('Chloe'))
assert_equal @l += 1, @kibbles.eaters.count
@kibbles.reload
assert_equal @l, @kibbles.eaters.count
end
def test_duplicate_assignment
# try to add a duplicate item
@kibbles.eaters.push(@alice)
assert @kibbles.eaters.include?(@alice)
@kibbles.eaters.push(@alice)
assert_equal @l + 1, @kibbles.eaters.count
assert_equal @join_count + 1, EatersFoodstuff.count
@kibbles.reload
assert_equal @l + 1, @kibbles.eaters.count
assert_equal @join_count + 1, EatersFoodstuff.count
end
def test_create_and_push
assert @kibbles.eaters.push(@spot)
assert_equal @l += 1, @kibbles.eaters.count
assert @kibbles.eaters << @rover
assert @kibbles.eaters << Kitten.create(:name => "Miranda")
assert_equal @l += 2, @kibbles.eaters.length
@kibbles.reload
assert_equal @l, @kibbles.eaters.length
# test that ids and new flags were set appropriately
assert_not_nil @kibbles.eaters[0].id
assert !@kibbles.eaters[1].new_record?
end
def test_reload
assert @kibbles.reload
assert @kibbles.eaters.reload
end
def test_add_join_record
assert_equal Kitten, @chloe.class
assert @join_record = EatersFoodstuff.new(:foodstuff_id => @bits.id, :eater_id => @chloe.id, :eater_type => @chloe.class.name )
assert @join_record.save!
assert @join_record.id
assert_equal @join_count + 1, EatersFoodstuff.count
# has the parent changed if we don't reload?
assert_equal @m, @bits.eaters.count
# if we do reload, is the new association there?
# XXX no, because TestCase breaks reload. it works fine in the app.
assert_equal Petfood, @bits.eaters.reload.class
assert_equal @m + 1, @bits.eaters.count
assert @bits.eaters.include?(@chloe)
# puts "XXX #{EatersFoodstuff.count}"
end
def test_add_unsaved
# add an unsaved item
assert @bits.eaters << Kitten.new(:name => "Bridget")
assert_nil Kitten.find_by_name("Bridget")
assert_equal @m + 1, @bits.eaters.count
assert @bits.save
@bits.reload
assert_equal @m + 1, @bits.eaters.count
end
def test_self_reference
assert @kibbles.eaters << @bits
assert_equal @l += 1, @kibbles.eaters.count
assert @kibbles.eaters.include?(@bits)
@kibbles.reload
assert @kibbles.foodstuffs_of_eaters.blank?
@bits.reload
assert @bits.foodstuffs_of_eaters.include?(@kibbles)
assert_equal [@kibbles], @bits.foodstuffs_of_eaters
end
def test_remove
assert @kibbles.eaters << @chloe
@kibbles.reload
assert @kibbles.eaters.delete(@kibbles.eaters[0])
assert_equal @l, @kibbles.eaters.count
end
def test_destroy
assert @kibbles.eaters.push(@chloe)
@kibbles.reload
assert @kibbles.eaters.length > 0
assert @kibbles.eaters[0].destroy
@kibbles.reload
assert_equal @l, @kibbles.eaters.count
end
def test_clear
@kibbles.eaters << [@chloe, @spot, @rover]
@kibbles.reload
assert_equal 3, @kibbles.eaters.clear.size
assert @kibbles.eaters.blank?
@kibbles.reload
assert @kibbles.eaters.blank?
assert_equal 0, @kibbles.eaters.clear.size
end
def test_individual_collections
assert @kibbles.eaters.push(@chloe)
# check if individual collections work
assert_equal @kibbles.eater_kittens.length, 1
assert @kibbles.eater_dogs
assert 1, @rover.eaters_foodstuffs.count
end
def test_invididual_collections_push
assert_equal [@chloe], (@kibbles.eater_kittens << @chloe)
@kibbles.reload
assert @kibbles.eaters.include?(@chloe)
assert @kibbles.eater_kittens.include?(@chloe)
assert !@kibbles.eater_dogs.include?(@chloe)
end
def test_invididual_collections_delete
@kibbles.eaters << [@chloe, @spot, @rover]
@kibbles.reload
assert_equal [@chloe], @kibbles.eater_kittens.delete(@chloe)
assert @kibbles.eater_kittens.empty?
assert !@kibbles.eater_kittens.delete(@chloe)
@kibbles.reload
assert @kibbles.eater_kittens.empty?
assert @kibbles.eater_dogs.include?(@spot)
end
def test_invididual_collections_clear
@kibbles.eaters << [@chloe, @spot, @rover]
@kibbles.reload
assert_equal [@chloe], @kibbles.eater_kittens.clear
assert @kibbles.eater_kittens.empty?
assert_equal 2, @kibbles.eaters.size
@kibbles.reload
assert @kibbles.eater_kittens.empty?
assert_equal 2, @kibbles.eaters.size
assert !@kibbles.eater_kittens.include?(@chloe)
assert !@kibbles.eaters.include?(@chloe)
end
def test_childrens_individual_collections
assert Cat.find_by_name('Chloe').eaters_foodstuffs
assert @kibbles.eaters_foodstuffs
end
def test_self_referential_join_tables
# check that the self-reference join tables go the right ways
assert_equal @l, @kibbles.eaters_foodstuffs.count
assert_equal @kibbles.eaters_foodstuffs.count, @kibbles.eaters_foodstuffs_as_child.count
end
def test_dependent
assert @kibbles.eaters << @chloe
@kibbles.reload
# delete ourself and see if :dependent was obeyed
dependent_rows = @kibbles.eaters_foodstuffs
assert_equal dependent_rows.length, @kibbles.eaters.count
@join_count = EatersFoodstuff.count
@kibbles.destroy
assert_equal @join_count - dependent_rows.length, EatersFoodstuff.count
assert_equal 0, EatersFoodstuff.find(:all, :conditions => ['foodstuff_id = ?', 1] ).length
end
def test_normal_callbacks
assert @rover.respond_to?(:after_initialize)
assert @rover.respond_to?(:after_find)
assert @rover.after_initialize_test
assert @rover.after_find_test
end
def test_our_callbacks
assert 0, @bits.eaters.count
assert @bits.eaters.push(@rover)
@bits.save
# puts "Testing callbacks."
@bits2 = Petfood.find_by_name("Bits")
@bits.reload
assert rover = @bits2.eaters.select { |x| x.name == "Rover" }[0]
assert rover.after_initialize_test
assert rover.after_find_test
# puts "Done."
end
def test_number_of_join_records
assert EatersFoodstuff.create(:foodstuff_id => 1, :eater_id => 1, :eater_type => "Cat")
@join_count = EatersFoodstuff.count
assert @join_count > 0
end
def test_number_of_regular_records
dogs = Dog.count
assert Dog.new(:name => "Auggie").save!
assert dogs + 1, Dog.count
end
def test_attributes_come_through_when_child_has_underscore_in_table_name
@join_record = EatersFoodstuff.new(:foodstuff_id => @bits.id, :eater_id => @puma.id, :eater_type => @puma.class.name)
@join_record.save!
@bits.eaters.reload
assert_equal 'Puma', @puma.name
assert_equal 'Puma', @bits.eaters.first.name
end
def test_before_save_on_join_table_is_not_clobbered_by_sti_base_class_fix
assert @kibbles.eaters << @chloe
assert_equal 3, @kibbles.eaters_foodstuffs.first.some_attribute
end
def test_creating_namespaced_relationship
assert @shamu.aquatic_pupils.empty?
@shamu.aquatic_pupils << @swimmy
assert_equal 1, @shamu.aquatic_pupils.length
@shamu.reload
assert_equal 1, @shamu.aquatic_pupils.length
end
def test_namespaced_polymorphic_collection
@shamu.aquatic_pupils << @swimmy
assert @shamu.aquatic_pupils.include?(@swimmy)
@shamu.reload
assert @shamu.aquatic_pupils.include?(@swimmy)
@shamu.aquatic_pupils << @spot
assert @shamu.dogs.include?(@spot)
assert @shamu.aquatic_pupils.include?(@swimmy)
assert_equal @swimmy, @shamu.aquatic_fish.first
assert_equal 10, @shamu.aquatic_fish.first.speed
end
def test_deleting_namespaced_relationship
@shamu.aquatic_pupils << @swimmy
@shamu.aquatic_pupils << @spot
@shamu.reload
@shamu.aquatic_pupils.delete @spot
assert !@shamu.dogs.include?(@spot)
assert !@shamu.aquatic_pupils.include?(@spot)
assert_equal 1, @shamu.aquatic_pupils.length
end
def test_unrenamed_parent_of_namespaced_child
@shamu.aquatic_pupils << @swimmy
assert_equal [@shamu], @swimmy.whales
end
def test_empty_double_collections
assert @puma.enemies.empty?
assert @froggy.protectors.empty?
assert @alice.enemies.empty?
assert @spot.protectors.empty?
assert @alice.beautiful_fight_relationships_as_enemy.empty?
assert @alice.beautiful_fight_relationships_as_protector.empty?
assert @alice.beautiful_fight_relationships.empty?
end
def test_double_collection_assignment
@alice.enemies << @spot
@alice.reload
@spot.reload
assert @spot.protectors.include?(@alice)
assert @alice.enemies.include?(@spot)
assert !@alice.protectors.include?(@alice)
assert_equal 1, @alice.beautiful_fight_relationships_as_protector.size
assert_equal 0, @alice.beautiful_fight_relationships_as_enemy.size
assert_equal 1, @alice.beautiful_fight_relationships.size
# self reference
assert_equal 1, @alice.enemies.length
@alice.enemies.push @alice
assert @alice.enemies.include?(@alice)
assert_equal 2, @alice.enemies.length
@alice.reload
assert_equal 2, @alice.beautiful_fight_relationships_as_protector.size
assert_equal 1, @alice.beautiful_fight_relationships_as_enemy.size
assert_equal 3, @alice.beautiful_fight_relationships.size
end
def test_double_collection_deletion
@alice.enemies << @spot
@alice.reload
assert @alice.enemies.include?(@spot)
@alice.enemies.delete(@spot)
assert !@alice.enemies.include?(@spot)
assert @alice.enemies.empty?
@alice.reload
assert !@alice.enemies.include?(@spot)
assert @alice.enemies.empty?
assert_equal 0, @alice.beautiful_fight_relationships.size
end
def test_double_collection_deletion_from_opposite_side
@alice.protectors << @puma
@alice.reload
assert @alice.protectors.include?(@puma)
@alice.protectors.delete(@puma)
assert !@alice.protectors.include?(@puma)
assert @alice.protectors.empty?
@alice.reload
assert !@alice.protectors.include?(@puma)
assert @alice.protectors.empty?
assert_equal 0, @alice.beautiful_fight_relationships.size
end
def test_individual_collections_created_for_double_relationship
assert @alice.dogs.empty?
@alice.enemies << @spot
assert @alice.enemies.include?(@spot)
assert !@alice.kittens.include?(@alice)
assert !@alice.dogs.include?(@spot)
@alice.reload
assert @alice.dogs.include?(@spot)
assert !WildBoar.find(@alice.id).dogs.include?(@spot) # make sure the parent type is checked
end
def test_individual_collections_created_for_double_relationship_from_opposite_side
assert @alice.wild_boars.empty?
@alice.protectors << @puma
assert @alice.protectors.include?(@puma)
assert !@alice.wild_boars.include?(@puma)
@alice.reload
assert @alice.wild_boars.include?(@puma)
assert !Dog.find(@alice.id).wild_boars.include?(@puma) # make sure the parent type is checked
end
def test_self_referential_individual_collections_created_for_double_relationship
@alice.enemies << @alice
@alice.reload
assert @alice.enemy_kittens.include?(@alice)
assert @alice.protector_kittens.include?(@alice)
assert @alice.kittens.include?(@alice)
assert_equal 2, @alice.kittens.size
@alice.enemies << (@chloe = Kitten.find_by_name('Chloe'))
@alice.reload
assert @alice.enemy_kittens.include?(@chloe)
assert !@alice.protector_kittens.include?(@chloe)
assert @alice.kittens.include?(@chloe)
assert_equal 3, @alice.kittens.size
end
def test_child_of_polymorphic_join_can_reach_parent
@alice.enemies << @spot
@alice.reload
assert @spot.protectors.include?(@alice)
end
def test_double_collection_deletion_from_child_polymorphic_join
@alice.enemies << @spot
@spot.protectors.delete(@alice)
assert !@spot.protectors.include?(@alice)
@alice.reload
assert !@alice.enemies.include?(@spot)
BeautifulFightRelationship.create(:protector_id => 2, :protector_type => "Dog", :enemy_id => @spot.id, :enemy_type => @spot.class.name)
@alice.enemies << @spot
@spot.protectors.delete(@alice)
assert !@spot.protectors.include?(@alice)
end
def test_hmp_passed_block_manipulates_proxy_class
assert_equal "result", @shamu.aquatic_pupils.blow
assert_raises(NoMethodError) { @kibbles.eaters.blow }
end
def test_collection_query_on_unsaved_record
assert Dog.new.enemies.empty?
assert Dog.new.foodstuffs_of_eaters.empty?
end
def test_double_invididual_collections_push
assert_equal [@chloe], (@spot.protector_kittens << @chloe)
@spot.reload
assert @spot.protectors.include?(@chloe)
assert @spot.protector_kittens.include?(@chloe)
assert !@spot.protector_dogs.include?(@chloe)
assert_equal [@froggy], (@spot.frogs << @froggy)
@spot.reload
assert @spot.enemies.include?(@froggy)
assert @spot.frogs.include?(@froggy)
assert !@spot.enemy_dogs.include?(@froggy)
end
def test_double_invididual_collections_delete
@spot.protectors << [@chloe, @puma]
@spot.reload
assert_equal [@chloe], @spot.protector_kittens.delete(@chloe)
assert @spot.protector_kittens.empty?
assert !@spot.protector_kittens.delete(@chloe)
@spot.reload
assert @spot.protector_kittens.empty?
assert @spot.wild_boars.include?(@puma)
end
def test_double_invididual_collections_clear
@spot.protectors << [@chloe, @puma, @alice]
@spot.reload
assert_equal [@chloe, @alice], @spot.protector_kittens.clear.sort_by(&:id)
assert @spot.protector_kittens.empty?
assert_equal 1, @spot.protectors.size
@spot.reload
assert @spot.protector_kittens.empty?
assert_equal 1, @spot.protectors.size
assert !@spot.protector_kittens.include?(@chloe)
assert !@spot.protectors.include?(@chloe)
assert !@spot.protector_kittens.include?(@alice)
assert !@spot.protectors.include?(@alice)
end
end