This should fix an issue discovered by tde when reading all fields on a record
on which you don't have access right:
- _read_from_database() fetches result and store it in cache
- read() retrieves values from cache, starting with field 'create_date'...
- ... which is not in cache, so prefetch that field, read it, which goes into
an infinite loop
The problem is that _read_from_database() finds out that you don't have access
on the record, and stores a FailedValue in cache on all fields... except magic
fields. Fix the problem by storing the FailedValue on all fields but 'id'.