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module ActiveRecord
module ConnectionAdapters # :nodoc:
module Quoting
# Quotes the column value to help prevent
# {SQL injection attacks}[http://en.wikipedia.org/wiki/SQL_injection].
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)
"#{quoted_string_prefix}'#{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
"#{quoted_string_prefix}'#{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')
else
if value.acts_like?(:date) || value.acts_like?(:time)
"'#{quoted_date(value)}'"
else
"#{quoted_string_prefix}'#{quote_string(value.to_yaml)}'"
end
end
end
# Quotes a string, escaping any ' (single quote) and \ (backslash)
# characters.
def quote_string(s)
s.gsub(/\\/, '\&\&').gsub(/'/, "''") # ' (for ruby-mode)
end
# Quotes the column name. Defaults to no quoting.
def quote_column_name(column_name)
column_name
end
# Quotes the table name. Defaults to column name quoting.
def quote_table_name(table_name)
quote_column_name(table_name)
end
def quoted_true
"'t'"
end
def quoted_false
"'f'"
end
def quoted_date(value)
value.to_s(:db)
end
def quoted_string_prefix
''
end
end
end
end
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