module ActiveRecord::AttributeMethods::Read::ClassMethods
Public Instance Methods
cache_attribute?(attr_name)
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Returns true
if the provided attribute is being cached.
# File lib/active_record/attribute_methods/read.rb, line 61 def cache_attribute?(attr_name) cached_attributes.include?(attr_name) end
cache_attributes(*attribute_names)
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cache_attributes
allows you to declare which converted
attribute values should be cached. Usually caching only pays off for
attributes with expensive conversion methods, like time related columns
(e.g. created_at
, updated_at
).
# File lib/active_record/attribute_methods/read.rb, line 50 def cache_attributes(*attribute_names) cached_attributes.merge attribute_names.map { |attr| attr.to_s } end
cached_attributes()
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Returns the attributes which are cached. By default time related columns
with datatype :datetime, :timestamp, :time, :date
are cached.
# File lib/active_record/attribute_methods/read.rb, line 56 def cached_attributes @cached_attributes ||= columns.select { |c| cacheable_column?(c) }.map { |col| col.name }.to_set end
Protected Instance Methods
define_method_attribute(name)
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# File lib/active_record/attribute_methods/read.rb, line 68 def define_method_attribute(name) method = ReaderMethodCache[name] generated_attribute_methods.module_eval { define_method name, method } end
Private Instance Methods
cacheable_column?(column)
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# File lib/active_record/attribute_methods/read.rb, line 95 def cacheable_column?(column) if attribute_types_cached_by_default == ATTRIBUTE_TYPES_CACHED_BY_DEFAULT ! serialized_attributes.include? column.name else attribute_types_cached_by_default.include?(column.type) end end