Methods

Instance Public methods

quote(value)

Quotes the column value to help prevent SQL injection attacks.

📝 Source code 
# File activerecord/lib/active_record/connection_adapters/abstract/quoting.rb, line 11
      def quote(value)
        case value
        when String, Symbol, 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 Class      then "'#{value}'"
        else raise TypeError, "can't quote #{value.class.name}"
        end
      end
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quote_bound_value(value)

Quote a value to be used as a bound parameter of unknown type. For example, MySQL might perform dangerous castings when comparing a string to a number, so this method will cast numbers to string.

📝 Source code 
# File activerecord/lib/active_record/connection_adapters/abstract/quoting.rb, line 50
      def quote_bound_value(value)
        quote(value)
      end
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quote_column_name(column_name)

Quotes the column name. Defaults to no quoting.

📝 Source code 
# File activerecord/lib/active_record/connection_adapters/abstract/quoting.rb, line 74
      def quote_column_name(column_name)
        column_name.to_s
      end
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quote_string(s)

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

📝 Source code 
# File activerecord/lib/active_record/connection_adapters/abstract/quoting.rb, line 69
      def quote_string(s)
        s.gsub("\\", '\&\&').gsub("'", "''") # ' (for ruby-mode)
      end
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quote_table_name(table_name)

Quotes the table name. Defaults to column name quoting.

📝 Source code 
# File activerecord/lib/active_record/connection_adapters/abstract/quoting.rb, line 79
      def quote_table_name(table_name)
        quote_column_name(table_name)
      end
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quote_table_name_for_assignment(table, attr)

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).

📝 Source code 
# File activerecord/lib/active_record/connection_adapters/abstract/quoting.rb, line 91
      def quote_table_name_for_assignment(table, attr)
        quote_table_name("#{table}.#{attr}")
      end
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quoted_date(value)

Quote date/time values for use in SQL input. Includes microseconds if the value is a Time responding to usec.

📝 Source code 
# File activerecord/lib/active_record/connection_adapters/abstract/quoting.rb, line 122
      def quoted_date(value)
        if value.acts_like?(:time)
          if ActiveRecord.default_timezone == :utc
            value = value.getutc if !value.utc?
          else
            value = value.getlocal
          end
        end

        result = value.to_fs(:db)
        if value.respond_to?(:usec) && value.usec > 0
          result << "." << sprintf("%06d", value.usec)
        else
          result
        end
      end
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quoted_false()

📝 Source code 
# File activerecord/lib/active_record/connection_adapters/abstract/quoting.rb, line 112
      def quoted_false
        "FALSE"
      end
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quoted_true()

📝 Source code 
# File activerecord/lib/active_record/connection_adapters/abstract/quoting.rb, line 104
      def quoted_true
        "TRUE"
      end
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type_cast(value)

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.

📝 Source code 
# File activerecord/lib/active_record/connection_adapters/abstract/quoting.rb, line 32
      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 nil, Numeric, String then value
        when Type::Time::Value then quoted_time(value)
        when Date, Time then quoted_date(value)
        else raise TypeError, "can't cast #{value.class.name}"
        end
      end
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unquoted_false()

📝 Source code 
# File activerecord/lib/active_record/connection_adapters/abstract/quoting.rb, line 116
      def unquoted_false
        false
      end
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unquoted_true()

📝 Source code 
# File activerecord/lib/active_record/connection_adapters/abstract/quoting.rb, line 108
      def unquoted_true
        true
      end
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