module ActiveRecord::ConnectionAdapters::Quoting
Public Instance Methods
Quotes the column value to help prevent SQL injection attacks.
# File lib/active_record/connection_adapters/abstract/quoting.rb, line 11 def quote(value) value = id_value_for_database(value) if value.is_a?(Base) if value.respond_to?(:value_for_database) value = value.value_for_database end _quote(value) end
Quotes the column name. Defaults to no quoting.
# File lib/active_record/connection_adapters/abstract/quoting.rb, line 67 def quote_column_name(column_name) column_name.to_s end
Quotes a string, escaping any ' (single quote) and \ (backslash) characters.
# File lib/active_record/connection_adapters/abstract/quoting.rb, line 62 def quote_string(s) s.gsub('\\'.freeze, '\&\&'.freeze).gsub("'".freeze, "''".freeze) # ' (for ruby-mode) end
Quotes the table name. Defaults to column name quoting.
# File lib/active_record/connection_adapters/abstract/quoting.rb, line 72 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 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).
# File lib/active_record/connection_adapters/abstract/quoting.rb, line 84 def quote_table_name_for_assignment(table, attr) quote_table_name("#{table}.#{attr}") end
Quote date/time values for use in SQL input. Includes microseconds if the value is a Time responding to usec.
# File lib/active_record/connection_adapters/abstract/quoting.rb, line 115 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 result = value.to_s(:db) if value.respond_to?(:usec) && value.usec > 0 "#{result}.#{sprintf("%06d", value.usec)}" else result end end
# File lib/active_record/connection_adapters/abstract/quoting.rb, line 105 def quoted_false "FALSE".freeze end
# File lib/active_record/connection_adapters/abstract/quoting.rb, line 97 def quoted_true "TRUE".freeze 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.
# File lib/active_record/connection_adapters/abstract/quoting.rb, line 24 def type_cast(value, column = nil) value = id_value_for_database(value) if value.is_a?(Base) if column value = type_cast_from_column(column, value) end _type_cast(value) rescue TypeError to_type = column ? " to #{column.type}" : "" raise TypeError, "can't cast #{value.class}#{to_type}" end
# File lib/active_record/connection_adapters/abstract/quoting.rb, line 109 def unquoted_false false end
# File lib/active_record/connection_adapters/abstract/quoting.rb, line 101 def unquoted_true true end
Private Instance Methods
# File lib/active_record/connection_adapters/abstract/quoting.rb, line 164 def _quote(value) case value when String, ActiveSupport::Multibyte::Chars "'#{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 Type::Binary::Data then quoted_binary(value) when Type::Time::Value then "'#{quoted_time(value)}'" when Date, Time then "'#{quoted_date(value)}'" when Symbol then "'#{quote_string(value.to_s)}'" when Class then "'#{value}'" else raise TypeError, "can't quote #{value.class.name}" end end
# File lib/active_record/connection_adapters/abstract/quoting.rb, line 183 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 Type::Time::Value then quoted_time(value) when Date, Time then quoted_date(value) when *types_which_need_no_typecasting value else raise TypeError end end
# File lib/active_record/connection_adapters/abstract/quoting.rb, line 154 def id_value_for_database(value) if primary_key = value.class.primary_key value.instance_variable_get(:@attributes)[primary_key].value_for_database end end
# File lib/active_record/connection_adapters/abstract/quoting.rb, line 150 def lookup_cast_type(sql_type) type_map.lookup(sql_type) end
# File lib/active_record/connection_adapters/abstract/quoting.rb, line 160 def types_which_need_no_typecasting [nil, Numeric, String] end