Module: IdentityCache::CacheKeyGeneration

Extended by:
ActiveSupport::Concern
Included in:
IdentityCache
Defined in:
lib/identity_cache/cache_key_generation.rb

Defined Under Namespace

Modules: ClassMethods

Constant Summary collapse

DEFAULT_NAMESPACE = 
"IDC:#{CACHE_VERSION}:".freeze

Class Method Summary collapse

Instance Method Summary collapse

Class Method Details

.denormalized_schema_hash(klass) ⇒ Object 



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

def self.denormalized_schema_hash(klass)
  schema_string = schema_to_string(klass.columns)
  if klass.include?(IdentityCache)
    klass.send(:all_cached_associations).sort.each do |name, options|
      klass.send(:check_association_scope, name)
      case options[:embed]
      when true
        schema_string << ",#{name}:(#{denormalized_schema_hash(options[:association_reflection].klass)})"
      when :ids
        schema_string << ",#{name}:ids"
      end
    end
  end
  IdentityCache.memcache_hash(schema_string)
end

.schema_to_string(columns) ⇒ Object 



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# File 'lib/identity_cache/cache_key_generation.rb', line 6

def self.schema_to_string(columns)
  columns.sort_by(&:name).map{|c| "#{c.name}:#{c.type}"}.join(',')
end

Instance Method Details

#attribute_cache_key_for_attribute_and_current_values(attribute, fields, unique) ⇒ Object

:nodoc:



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# File 'lib/identity_cache/cache_key_generation.rb', line 63

def attribute_cache_key_for_attribute_and_current_values(attribute, fields, unique) # :nodoc:
  self.class.rails_cache_key_for_attribute_and_fields_and_values(attribute, fields, current_values_for_fields(fields), unique)
end

#attribute_cache_key_for_attribute_and_previous_values(attribute, fields, unique) ⇒ Object

:nodoc:



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# File 'lib/identity_cache/cache_key_generation.rb', line 67

def attribute_cache_key_for_attribute_and_previous_values(attribute, fields, unique) # :nodoc:
  self.class.rails_cache_key_for_attribute_and_fields_and_values(attribute, fields, old_values_for_fields(fields), unique)
end

#current_values_for_fields(fields) ⇒ Object

:nodoc:



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# File 'lib/identity_cache/cache_key_generation.rb', line 71

def current_values_for_fields(fields) # :nodoc:
  fields.collect {|field| self.send(field)}
end

#old_values_for_fields(fields) ⇒ Object

:nodoc:



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# File 'lib/identity_cache/cache_key_generation.rb', line 75

def old_values_for_fields(fields) # :nodoc:
  fields.map do |field|
    field_string = field.to_s
    if destroyed? && transaction_changed_attributes.has_key?(field_string)
      transaction_changed_attributes[field_string]
    elsif persisted? && transaction_changed_attributes.has_key?(field_string)
      transaction_changed_attributes[field_string]
    else
      self.send(field)
    end
  end
end

#primary_cache_index_key ⇒ Object

:nodoc:



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# File 'lib/identity_cache/cache_key_generation.rb', line 59

def primary_cache_index_key # :nodoc:
  self.class.rails_cache_key(id)
end