I am currently mapping ActiveRecord to an existent database system and
there is one oddity in it: the primary key starts with 1 and not with
0 and it is not even marked as auto increment.
I can't change the table or the column names since it would brake this
So my question is, how do I force ActiveRecord to automatically create
primary key values max + 1, where max is either 0 if no entry is
existent or the max primary key value in the table.