Hope to change as Primary key model

[cdmalcl]

Hope to change as a primary key model, query and more efficient operation of some.
Can be directly inserted data, otherwise we must first find, and then add or update.

[cdmalcl]

eg:
{ prefix_pk1_value:value+sort, prefix_pk2_value:value+sort, ... }

older:
[{_id:1, id:1, testkey:"testval"}, {_id:2, id:2, testkey:"testval"}, ...]
to:
{rns_id_1:{_sort:1, id:1, testkey:"testval"}, rns_id_2:{_sort:2, id:2, testkey:"testval"}, ...}

we can set prefix to empty. The default is _id_1,_id_2,id...,
DB.foo.find({ where: { id: 1 } }).then(resp => do something));

That is, "Primary key" model to query when the key-name is 'id'.