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# File activerecord/lib/active_record/connection_adapters/abstract/quoting.rb, line 66 def fetch_type_metadata(sql_type) cast_type = lookup_cast_type(sql_type) SqlTypeMetadata.new( sql_type: sql_type, type: cast_type.type, limit: cast_type.limit, precision: cast_type.precision, scale: cast_type.scale, ) end
Quotes the column value to help prevent SQL injection attacks.
# File activerecord/lib/active_record/connection_adapters/abstract/quoting.rb, line 8 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(" 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. ".squish) value = type_cast_from_column(column, value) end _quote(value) end
Quotes the column name. Defaults to no quoting.
Quotes a string, escaping any ' (single quote) and \ (backslash) characters.
Quotes the table name. Defaults to column name quoting.
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).
Quote date/time values for use in SQL input. Includes microseconds if the value is a Time responding to usec.
# File activerecord/lib/active_record/connection_adapters/abstract/quoting.rb, line 132 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
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 activerecord/lib/active_record/connection_adapters/abstract/quoting.rb, line 28 def type_cast(value, column = nil) if value.respond_to?(:quoted_id) && value.respond_to?(:id) return value.id end 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