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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)
case value
when String
if column && column.type == :binary
"'#{quote_string(column.string_to_binary(value))}'" # ' (for ruby-mode)
elsif column && [:integer, :float].include?(column.type)
value.to_s
else
"'#{quote_string(value)}'" # ' (for ruby-mode)
end
when NilClass then "NULL"
when TrueClass then (column && column.type == :boolean ? quoted_true : "1")
when FalseClass then (column && column.type == :boolean ? quoted_false : "0")
when Float, Fixnum, Bignum then value.to_s
when Date then "'#{value.to_s}'"
when Time, DateTime then "'#{value.strftime("%Y-%m-%d %H:%M:%S")}'"
else "'#{quote_string(value.to_yaml)}'"
end
end
# Quotes a string, escaping any ' (single quote) and \ (backslash)
# characters.
def quote_string(s)
s.gsub(/\\/, '\&\&').gsub(/'/, "''") # ' (for ruby-mode)
end
# Returns a quoted form of the column name. This is highly adapter
# specific.
def quote_column_name(name)
name
end
def quoted_true
"'t'"
end
def quoted_false
"'f'"
end
end
end
end
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