GetEventStore Multi-category projection

[Ricardo Enes da Silva]

If I have the following aggregates

- Clerk: Employee

- Manager : Employee

I require projections for

- ManagerSummary

- ClerkSuummary

- EmployeeSummary

I thought that I would subscribe to the category, $ce-, stream for Manager and Clerk, but what about Employ.

I could subscribe to both $ce-manager and $ce-clerk, but was hoping not to have touch the EmployeeSummary projection everytime a new Employee type is introduced to the system.

1. Does EventStore support multiple category projection if I create a stream as 'employee-manager-{AggregateId}' ?

2. If not, would it be a could practice to create a custom projection to do this or is there a better approach ?

3. When projecting to a category is the event assign the subsequent sequence number following the last event on the Category stream or does it retain this from its Original stream ?

Many thanks

[Greg Young]

You can always write your own. $ce just bases on the first bit up to -

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[Ricardo Enes da Silva]

Thanks Greg

Do I take it then that it is not entirely a bad idea ? 

and what of the event sequence number on the category stream (does it depend on whether I emit or link) ?

[Greg Young]

If you link then you have 2 sequences, one for the category projection
one for where it was originally written.

On Fri, Nov 25, 2016 at 2:30 PM, Ricardo Enes da Silva