Methods
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Instance Public methods
attribute_method?(attribute)
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attribute_methods_generated?()
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attribute_names()
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Returns an array of column names as strings if it's not an abstract class and table exists. Otherwise it returns an empty array.
dangerous_attribute_method?(name)
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A method name is 'dangerous' if it is already defined by Active Record, but not by any ancestors. (So 'puts' is not dangerous but 'save' is.)
define_attribute_methods()
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Generates all the attribute related methods for columns in the database accessors, mutators and query methods.
generated_external_attribute_methods()
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We will define the methods as instance methods, but will call them as singleton methods. This allows us to use method_defined? to check if the method exists, which is fast and won't give any false positives from the ancestors (because there are no ancestors).
instance_method_already_implemented?(method_name)
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# File activerecord/lib/active_record/attribute_methods.rb, line 62 def instance_method_already_implemented?(method_name) if dangerous_attribute_method?(method_name) raise DangerousAttributeError, "#{method_name} is defined by ActiveRecord" end if superclass == Base super else # If B < A and A defines its own attribute method, then we don't want to overwrite that. defined = method_defined_within?(method_name, superclass, superclass.generated_attribute_methods) defined && !ActiveRecord::Base.method_defined?(method_name) || super end end
method_defined_within?(name, klass, sup = klass.superclass)
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# File activerecord/lib/active_record/attribute_methods.rb, line 82 def method_defined_within?(name, klass, sup = klass.superclass) if klass.method_defined?(name) || klass.private_method_defined?(name) if sup.method_defined?(name) || sup.private_method_defined?(name) klass.instance_method(name).owner != sup.instance_method(name).owner else true end else false end end