Module: ActiveRecord::ConnectionAdapters::Quoting

Included in:
AbstractAdapter
Defined in:
lib/active_record/connection_adapters/abstract/quoting.rb

Instance Method Summary collapse

Instance Method Details

#quote(value, column = nil) ⇒ Object

Quotes the column value to help prevent SQL injection attacks.



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# File 'lib/active_record/connection_adapters/abstract/quoting.rb', line 6

def quote(value, column = nil)
  # records are quoted as their primary key
  return value.quoted_id if value.respond_to?(:quoted_id)

  case value
    when String, ActiveSupport::Multibyte::Chars
      value = value.to_s
      if column && column.type == :binary && column.class.respond_to?(:string_to_binary)
        "'#{quote_string(column.class.string_to_binary(value))}'" # ' (for ruby-mode)
      elsif column && [:integer, :float].include?(column.type)
        value = column.type == :integer ? value.to_i : value.to_f
        value.to_s
      else
        "'#{quote_string(value)}'" # ' (for ruby-mode)
      end
    when NilClass                 then "NULL"
    when TrueClass                then (column && column.type == :integer ? '1' : quoted_true)
    when FalseClass               then (column && column.type == :integer ? '0' : quoted_false)
    when Float, Fixnum, Bignum    then value.to_s
    # BigDecimals need to be output in a non-normalized form and quoted.
    when BigDecimal               then value.to_s('F')
    when Date                     then "'#{value.to_s(:db)}'"
    when Time, DateTime           then "'#{quoted_date(value)}'"
    else                          "'#{quote_string(value.to_yaml)}'"
  end
end

#quote_column_name(name) ⇒ Object

Returns a quoted form of the column name. This is highly adapter specific.



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# File 'lib/active_record/connection_adapters/abstract/quoting.rb', line 41

def quote_column_name(name)
  name
end

#quote_string(s) ⇒ Object

Quotes a string, escaping any ‘ (single quote) and \ (backslash) characters.



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# File 'lib/active_record/connection_adapters/abstract/quoting.rb', line 35

def quote_string(s)
  s.gsub(/\\/, '\&\&').gsub(/'/, "''") # ' (for ruby-mode)
end

#quoted_date(value) ⇒ Object 



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# File 'lib/active_record/connection_adapters/abstract/quoting.rb', line 53

def quoted_date(value)
  value.strftime("%Y-%m-%d %H:%M:%S")
end

#quoted_false ⇒ Object 



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# File 'lib/active_record/connection_adapters/abstract/quoting.rb', line 49

def quoted_false
  "'f'"
end

#quoted_true ⇒ Object 



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# File 'lib/active_record/connection_adapters/abstract/quoting.rb', line 45

def quoted_true
  "'t'"
end