How to update read model schema

268 views

Skip to first unread message

cybor...@gmail.com

unread,

Nov 21, 2022, 9:45:50 PM11/21/22

to DDD/CQRS

Hi All,

I would like to ask for your help.

I have a projector that is continuously running and listening for new events. If the projector is down and upon starting it up, I will read from the beginning of the stream to build up my read model. This usually takes time upon first request if the projector is down.

Now, I have a new requirements to add a new field in my read model for additional information in my reports.

Do I need to update my projector to add a new field and read from the beginning of the stream?

I am thinking to create a new version of my existing projector and read from the beginning of the stream and after hydrating, I will retire the old projector.

Thanks.

Greg Young

unread,

Nov 21, 2022, 10:10:22 PM11/21/22

to ddd...@googlegroups.com

"I am thinking to create a new version of my existing projector and read from the beginning of the stream and after hydrating, I will retire the old projector."

This is generally the best idea.

--
You received this message because you are subscribed to the Google Groups "DDD/CQRS" group.
To unsubscribe from this group and stop receiving emails from it, send an email to dddcqrs+u...@googlegroups.com.
To view this discussion on the web visit https://groups.google.com/d/msgid/dddcqrs/53304ed8-5396-4df1-924a-681cd4d21204n%40googlegroups.com.