diff options
| -rw-r--r-- | activerecord/lib/active_record/attribute_methods.rb | 24 | ||||
| -rw-r--r-- | activerecord/lib/active_record/attribute_methods/read.rb | 22 | ||||
| -rw-r--r-- | activerecord/lib/active_record/attribute_methods/write.rb | 13 | ||||
| -rw-r--r-- | activesupport/lib/active_support/deprecation/behaviors.rb | 2 | ||||
| -rw-r--r-- | activesupport/test/deprecation_test.rb | 4 | ||||
| -rw-r--r-- | guides/source/active_record_querying.md | 22 |
6 files changed, 30 insertions, 57 deletions
diff --git a/activerecord/lib/active_record/attribute_methods.rb b/activerecord/lib/active_record/attribute_methods.rb index 423a93964e..e902eb7531 100644 --- a/activerecord/lib/active_record/attribute_methods.rb +++ b/activerecord/lib/active_record/attribute_methods.rb @@ -34,30 +34,6 @@ module ActiveRecord BLACKLISTED_CLASS_METHODS = %w(private public protected allocate new name parent superclass) - class AttributeMethodCache - def initialize - @module = Module.new - @method_cache = Concurrent::Map.new - end - - def [](name) - @method_cache.compute_if_absent(name) do - safe_name = name.unpack('h*'.freeze).first - temp_method = "__temp__#{safe_name}" - ActiveRecord::AttributeMethods::AttrNames.set_name_cache safe_name, name - @module.module_eval method_body(temp_method, safe_name), __FILE__, __LINE__ - @module.instance_method temp_method - end - end - - private - - # Override this method in the subclasses for method body. - def method_body(method_name, const_name) - raise NotImplementedError, "Subclasses must implement a method_body(method_name, const_name) method." - end - end - class GeneratedAttributeMethods < Module; end # :nodoc: module ClassMethods diff --git a/activerecord/lib/active_record/attribute_methods/read.rb b/activerecord/lib/active_record/attribute_methods/read.rb index 5197e21fa4..ab2ecaa7c5 100644 --- a/activerecord/lib/active_record/attribute_methods/read.rb +++ b/activerecord/lib/active_record/attribute_methods/read.rb @@ -1,8 +1,11 @@ module ActiveRecord module AttributeMethods module Read - ReaderMethodCache = Class.new(AttributeMethodCache) { - private + extend ActiveSupport::Concern + + module ClassMethods + protected + # We want to generate the methods via module_eval rather than # define_method, because define_method is slower on dispatch. # Evaluating many similar methods may use more memory as the instruction @@ -21,21 +24,6 @@ module ActiveRecord # to allocate an object on each call to the attribute method. # Making it frozen means that it doesn't get duped when used to # key the @attributes in read_attribute. - def method_body(method_name, const_name) - <<-EOMETHOD - def #{method_name} - name = ::ActiveRecord::AttributeMethods::AttrNames::ATTR_#{const_name} - _read_attribute(name) { |n| missing_attribute(n, caller) } - end - EOMETHOD - end - }.new - - extend ActiveSupport::Concern - - module ClassMethods - protected - def define_method_attribute(name) safe_name = name.unpack('h*'.freeze).first temp_method = "__temp__#{safe_name}" diff --git a/activerecord/lib/active_record/attribute_methods/write.rb b/activerecord/lib/active_record/attribute_methods/write.rb index bbf2a51a0e..5599b590ca 100644 --- a/activerecord/lib/active_record/attribute_methods/write.rb +++ b/activerecord/lib/active_record/attribute_methods/write.rb @@ -1,19 +1,6 @@ module ActiveRecord module AttributeMethods module Write - WriterMethodCache = Class.new(AttributeMethodCache) { - private - - def method_body(method_name, const_name) - <<-EOMETHOD - def #{method_name}(value) - name = ::ActiveRecord::AttributeMethods::AttrNames::ATTR_#{const_name} - write_attribute(name, value) - end - EOMETHOD - end - }.new - extend ActiveSupport::Concern included do diff --git a/activesupport/lib/active_support/deprecation/behaviors.rb b/activesupport/lib/active_support/deprecation/behaviors.rb index 0de891f1a2..dc24e2d0e1 100644 --- a/activesupport/lib/active_support/deprecation/behaviors.rb +++ b/activesupport/lib/active_support/deprecation/behaviors.rb @@ -11,7 +11,7 @@ module ActiveSupport DEFAULT_BEHAVIORS = { raise: ->(message, callstack) { e = DeprecationException.new(message) - e.set_backtrace(callstack) + e.set_backtrace(callstack.map(&:to_s)) raise e }, diff --git a/activesupport/test/deprecation_test.rb b/activesupport/test/deprecation_test.rb index 58a0a3964d..45c88b79cb 100644 --- a/activesupport/test/deprecation_test.rb +++ b/activesupport/test/deprecation_test.rb @@ -105,13 +105,13 @@ class DeprecationTest < ActiveSupport::TestCase ActiveSupport::Deprecation.behavior = :raise message = 'Revise this deprecated stuff now!' - callstack = %w(foo bar baz) + callstack = caller_locations e = assert_raise ActiveSupport::DeprecationException do ActiveSupport::Deprecation.behavior.first.call(message, callstack) end assert_equal message, e.message - assert_equal callstack, e.backtrace + assert_equal callstack.map(&:to_s), e.backtrace.map(&:to_s) end def test_default_stderr_behavior diff --git a/guides/source/active_record_querying.md b/guides/source/active_record_querying.md index 63658e7c8b..1235c04c50 100644 --- a/guides/source/active_record_querying.md +++ b/guides/source/active_record_querying.md @@ -1296,6 +1296,28 @@ Using a class method is the preferred way to accept arguments for scopes. These category.articles.created_before(time) ``` +### Using conditionals + +Your scope can utilize conditionals: + +```ruby +class Article < ApplicationRecord + scope :created_before, ->(time) { where("created_at < ?", time) if time.present? } +end +``` + +Like the other examples, this will behave similarly to a class method. + +```ruby +class Article < ApplicationRecord + def self.created_before(time) + where("created_at < ?", time) if time.present? + end +end +``` + +However, there is one important caveat: A scope will always return an `ActiveRecord::Relation` object, even if the conditional evaluates to `false`, whereas a class method, will return `nil`. This can cause `NoMethodError` when chaining class methods with conditionals, if any of the conditionals return `false`. + ### Applying a default scope If we wish for a scope to be applied across all queries to the model we can use the |