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# File 'lib/validates_lengths_from_database.rb', line 43
def validate_lengths_from_database
options = self.class.validate_lengths_from_database_options
if options[:only]
columns_to_validate = options[:only].map(&:to_s)
else
columns_to_validate = self.class.column_names.map(&:to_s)
columns_to_validate -= options[:except].map(&:to_s) if options[:except]
end
columns_to_validate.each do |column|
column_schema = self.class.columns.find {|c| c.name == column }
next if column_schema.nil?
next if column_schema.respond_to?(:array) && column_schema.array
next unless [:string, :text, :decimal].include?(column_schema.type)
case column_schema.type
when :string, :text
column_limit = options[:limit][column_schema.type] || column_schema.limit
if column_limit
ActiveModel::Validations::LengthValidator.new(:maximum => column_limit, :allow_blank => true, :attributes => [column]).validate(self)
end
when :decimal
if column_schema.precision && column_schema.scale
max_val = (10 ** column_schema.precision)/(10 ** column_schema.scale)
ActiveModel::Validations::NumericalityValidator.new(:less_than => max_val, :allow_blank => true, :attributes => [column]).validate(self)
end
end
end
end
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