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rails--rails/activesupport/lib/active_support/descendants_tracker.rb

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Add ActiveSupport::DescendantsTracker.
2010-06-19 14:44:35 +00:00
require 'active_support/dependencies'
module ActiveSupport
# This module provides an internal implementation to track descendants
# which is faster than iterating through ObjectSpace.
module DescendantsTracker
Define a convention for descendants and subclasses. The former should be symmetric with ancestors and include all children. However, it should not include self since ancestors + descendants should not have duplicated. The latter is symmetric to superclass in the sense it only includes direct children. By adopting a convention, we expect to have less conflict with other frameworks, as Datamapper. For this moment, to ensure ActiveModel::Validations can be used with Datamapper, we should always call ActiveSupport::DescendantsTracker.descendants(self) internally instead of self.descendants avoiding conflicts.
2010-07-05 10:50:08 +00:00
@@direct_descendants = Hash.new { |h, k| h[k] = [] }
Add ActiveSupport::DescendantsTracker.
2010-06-19 14:44:35 +00:00
Define a convention for descendants and subclasses. The former should be symmetric with ancestors and include all children. However, it should not include self since ancestors + descendants should not have duplicated. The latter is symmetric to superclass in the sense it only includes direct children. By adopting a convention, we expect to have less conflict with other frameworks, as Datamapper. For this moment, to ensure ActiveModel::Validations can be used with Datamapper, we should always call ActiveSupport::DescendantsTracker.descendants(self) internally instead of self.descendants avoiding conflicts.
2010-07-05 10:50:08 +00:00
def self.direct_descendants(klass)
@@direct_descendants[klass]
end
def self.descendants(klass)
Don't shadow outer local variables
2010-07-22 17:57:42 +00:00
@@direct_descendants[klass].inject([]) do |descendants, _klass|
descendants << _klass
descendants.concat _klass.descendants
Define a convention for descendants and subclasses. The former should be symmetric with ancestors and include all children. However, it should not include self since ancestors + descendants should not have duplicated. The latter is symmetric to superclass in the sense it only includes direct children. By adopting a convention, we expect to have less conflict with other frameworks, as Datamapper. For this moment, to ensure ActiveModel::Validations can be used with Datamapper, we should always call ActiveSupport::DescendantsTracker.descendants(self) internally instead of self.descendants avoiding conflicts.
2010-07-05 10:50:08 +00:00
end
Remove descendants warning while executing tests.
2010-06-19 15:16:11 +00:00
end
Add ActiveSupport::DescendantsTracker.
2010-06-19 14:44:35 +00:00
def self.clear
Define a convention for descendants and subclasses. The former should be symmetric with ancestors and include all children. However, it should not include self since ancestors + descendants should not have duplicated. The latter is symmetric to superclass in the sense it only includes direct children. By adopting a convention, we expect to have less conflict with other frameworks, as Datamapper. For this moment, to ensure ActiveModel::Validations can be used with Datamapper, we should always call ActiveSupport::DescendantsTracker.descendants(self) internally instead of self.descendants avoiding conflicts.
2010-07-05 10:50:08 +00:00
@@direct_descendants.each do |klass, descendants|
Add ActiveSupport::DescendantsTracker.
2010-06-19 14:44:35 +00:00
if ActiveSupport::Dependencies.autoloaded?(klass)
Define a convention for descendants and subclasses. The former should be symmetric with ancestors and include all children. However, it should not include self since ancestors + descendants should not have duplicated. The latter is symmetric to superclass in the sense it only includes direct children. By adopting a convention, we expect to have less conflict with other frameworks, as Datamapper. For this moment, to ensure ActiveModel::Validations can be used with Datamapper, we should always call ActiveSupport::DescendantsTracker.descendants(self) internally instead of self.descendants avoiding conflicts.
2010-07-05 10:50:08 +00:00
@@direct_descendants.delete(klass)
Add ActiveSupport::DescendantsTracker.
2010-06-19 14:44:35 +00:00
else
descendants.reject! { |v| ActiveSupport::Dependencies.autoloaded?(v) }
end
end
end
def inherited(base)
self.direct_descendants << base
super
end
def direct_descendants
Define a convention for descendants and subclasses. The former should be symmetric with ancestors and include all children. However, it should not include self since ancestors + descendants should not have duplicated. The latter is symmetric to superclass in the sense it only includes direct children. By adopting a convention, we expect to have less conflict with other frameworks, as Datamapper. For this moment, to ensure ActiveModel::Validations can be used with Datamapper, we should always call ActiveSupport::DescendantsTracker.descendants(self) internally instead of self.descendants avoiding conflicts.
2010-07-05 10:50:08 +00:00
DescendantsTracker.direct_descendants(self)
Add ActiveSupport::DescendantsTracker.
2010-06-19 14:44:35 +00:00
end
def descendants
Define a convention for descendants and subclasses. The former should be symmetric with ancestors and include all children. However, it should not include self since ancestors + descendants should not have duplicated. The latter is symmetric to superclass in the sense it only includes direct children. By adopting a convention, we expect to have less conflict with other frameworks, as Datamapper. For this moment, to ensure ActiveModel::Validations can be used with Datamapper, we should always call ActiveSupport::DescendantsTracker.descendants(self) internally instead of self.descendants avoiding conflicts.
2010-07-05 10:50:08 +00:00
DescendantsTracker.descendants(self)
Add ActiveSupport::DescendantsTracker.
2010-06-19 14:44:35 +00:00
end
end
Don't shadow outer local variables
2010-07-22 17:57:42 +00:00
end