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require 'active_support/core_ext/big_decimal/conversions'
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)
if column
ActiveSupport::Deprecation.warn(<<-MSG.squish)
Passing a column to `quote` has been deprecated. It is only used
for type casting, which should be handled elsewhere. See
https://github.com/rails/arel/commit/6160bfbda1d1781c3b08a33ec4955f170e95be11
for more information.
MSG
value = column.cast_type.type_cast_for_database(value)
end
_quote(value)
end
# Cast a +value+ to a type that the database understands. For example,
# SQLite does not understand dates, so this method will convert a Date
# to a String.
def type_cast(value, column = nil)
if value.respond_to?(:quoted_id) && value.respond_to?(:id)
return value.id
end
if column
value = column.cast_type.type_cast_for_database(value)
end
_type_cast(value)
rescue TypeError
to_type = column ? " to #{column.type}" : ""
raise TypeError, "can't cast #{value.class}#{to_type}"
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
# Override to return the quoted table name for assignment. Defaults to
# table quoting.
#
# This works for mysql and mysql2 where table.column can be used to
# resolve ambiguity.
#
# We override this in the sqlite3 and postgresql adapters to use only
# the column name (as per syntax requirements).
def quote_table_name_for_assignment(table, attr)
quote_table_name("#{table}.#{attr}")
end
def quoted_true
"'t'"
end
def unquoted_true
't'
end
def quoted_false
"'f'"
end
def unquoted_false
'f'
end
def quoted_date(value)
if value.acts_like?(:time)
zone_conversion_method = ActiveRecord::Base.default_timezone == :utc ? :getutc : :getlocal
if value.respond_to?(zone_conversion_method)
value = value.send(zone_conversion_method)
end
end
value.to_s(:db)
end
def prepare_binds_for_database(binds) # :nodoc:
binds.map do |column, value|
if column
column_name = column.name
value = column.cast_type.type_cast_for_database(value)
end
[column_name, value]
end
end
private
def types_which_need_no_typecasting
[nil, Numeric, String]
end
def _quote(value)
case value
when String, ActiveSupport::Multibyte::Chars, Type::Binary::Data
"'#{quote_string(value.to_s)}'"
when true then quoted_true
when false then quoted_false
when nil then "NULL"
# BigDecimals need to be put in a non-normalized form and quoted.
when BigDecimal then value.to_s('F')
when Numeric, ActiveSupport::Duration then value.to_s
when Date, Time then "'#{quoted_date(value)}'"
when Symbol then "'#{quote_string(value.to_s)}'"
when Class then "'#{value}'"
else
"'#{quote_string(YAML.dump(value))}'"
end
end
def _type_cast(value)
case value
when Symbol, ActiveSupport::Multibyte::Chars, Type::Binary::Data
value.to_s
when true then unquoted_true
when false then unquoted_false
# BigDecimals need to be put in a non-normalized form and quoted.
when BigDecimal then value.to_s('F')
when Date, Time then quoted_date(value)
when *types_which_need_no_typecasting
value
else raise TypeError
end
end
end
end
end
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