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class Topic
include ActiveModel::Validations
include ActiveModel::Validations::Callbacks
def self._validates_default_keys
super | [ :message ]
end
attr_accessor :title, :author_name, :content, :approved, :created_at
attr_accessor :after_validation_performed
after_validation :perform_after_validation
def initialize(attributes = {})
attributes.each do |key, value|
send "#{key}=", value
end
end
def condition_is_true
true
end
def condition_is_true_but_its_not
false
end
def perform_after_validation
self.after_validation_performed = true
end
def my_validation
errors.add :title, "is missing" unless title
end
def my_validation_with_arg(attr)
errors.add attr, "is missing" unless send(attr)
end
end
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