5. Application Layer Update Product Flow MediatR Command + Handler Explained
Welcome back to Code Nest Institute!
In the previous video, we successfully created the Create Product Command, Handler, and DTO using CQRS and MediatR.
In this video, we will build the Update Product feature, which includes:
What We Create in This Video
✔ UpdateProduct folder
✔ UpdateProductDTO (with ProductId required)
✔ UpdateProductCommand
✔ UpdateProductHandler
✔ Mapping DTO → Domain entity
✔ Checking if product exists
✔ Updating fields
✔ Returning updated product information
✔ Handling null scenarios (missing product)
✔ Preparing for error handling in future videos
We follow the Clean Architecture approach where:
Command receives the data
Handler executes logic
Repository performs database operations
DTO ensures clean data transfer
This update flow is production-ready and follows CQRS best practices.
In the next video, we will implement error handling and validation for real-world scenarios.
Stay connected and keep learning!
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