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# File 'lib/validates_lengths_from_database.rb', line 11
def validates_lengths_from_database(options = {})
options.symbolize_keys!
return false unless self.table_exists?
options[:only] = Array[options[:only]] if options[:only] && !options[:only].is_a?(Array)
options[:except] = Array[options[:except]] if options[:except] && !options[:except].is_a?(Array)
options[:limit] ||= {}
if options[:limit] and !options[:limit].is_a?(Hash)
options[:limit] = {:string => options[:limit], :text => options[:limit]}
end
if options[:only]
columns_to_validate = options[:only].map(&:to_s)
else
columns_to_validate = 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 = columns.find {|c| c.name == column }
next if column_schema.nil?
next if ![:string, :text].include?(column_schema.type)
next if column_schema.respond_to?(:array) && column_schema.array
column_limit = options[:limit][column_schema.type] || column_schema.limit
next unless column_limit
class_eval do
validates_length_of column, :maximum => column_limit, :allow_blank => true
end
end
nil
end
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