Module: IdentityCache::ParentModelExpiration

Extended by:
ActiveSupport::Concern
Defined in:
lib/identity_cache/parent_model_expiration.rb

Overview

:nodoc:

Instance Method Summary collapse

Instance Method Details

#add_parents_to_cache_expiry_set(parents_to_expire) ⇒ Object 



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# File 'lib/identity_cache/parent_model_expiration.rb', line 18

def add_parents_to_cache_expiry_set(parents_to_expire)
  self.class.parent_expiration_entries.each do |association_name, cached_associations|
    parents_to_expire_on_changes(parents_to_expire, association_name, cached_associations)
  end
end

#add_record_to_cache_expiry_set(parents_to_expire, record) ⇒ Object 



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# File 'lib/identity_cache/parent_model_expiration.rb', line 24

def add_record_to_cache_expiry_set(parents_to_expire, record)
  key = record.primary_cache_index_key
  unless parents_to_expire[key]
    parents_to_expire[key] = record
    record.add_parents_to_cache_expiry_set(parents_to_expire) if record.respond_to?(:add_parents_to_cache_expiry_set, true)
  end
end

#expire_parent_caches ⇒ Object 



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# File 'lib/identity_cache/parent_model_expiration.rb', line 10

def expire_parent_caches
  parents_to_expire = {}
  add_parents_to_cache_expiry_set(parents_to_expire)
  parents_to_expire.each_value do |parent|
    parent.send(:expire_primary_index)
  end
end

#parents_to_expire_on_changes(parents_to_expire, association_name, cached_associations) ⇒ Object 



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# File 'lib/identity_cache/parent_model_expiration.rb', line 32

def parents_to_expire_on_changes(parents_to_expire, association_name, cached_associations)
  parent_association = self.class.reflect_on_association(association_name)
  foreign_key = parent_association.association_foreign_key

  new_parent = send(association_name)

  old_parent = nil
  if transaction_changed_attributes[foreign_key].present?
    begin
      if parent_association.options[:polymorhpic]
        klass = transaction_changed_attributes[parent_association.association_foreign_key].try(:constantize)
        klass ||= new_parent.class
      else
        klass = parent_association.klass
      end
      old_parent = klass.find(transaction_changed_attributes[foreign_key])
    rescue ActiveRecord::RecordNotFound => e
      # suppress errors finding the old parent if its been destroyed since it will have expired itself in that case
    end
  end

  cached_associations.each do |parent_class, only_on_foreign_key_change|
    if new_parent && new_parent.is_a?(parent_class) && should_expire_identity_cache_parent?(foreign_key, only_on_foreign_key_change)
      add_record_to_cache_expiry_set(parents_to_expire, new_parent)
    end

    if old_parent && old_parent.is_a?(parent_class)
      add_record_to_cache_expiry_set(parents_to_expire, old_parent)
    end
  end
end

#should_expire_identity_cache_parent?(foreign_key, only_on_foreign_key_change) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/identity_cache/parent_model_expiration.rb', line 64

def should_expire_identity_cache_parent?(foreign_key, only_on_foreign_key_change)
  if only_on_foreign_key_change
    destroyed? || was_new_record? || transaction_changed_attributes[foreign_key].present?
  else
    true
  end
end