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                                            webDEVILopers

Passing read models (value objects representing state) / domain service to aggregate methods

Here is a more complex example for merging contracts. ```php final class ServiceContract extends AggregateRoot { public function mergeWith(array $mergeWithContractIds, array $enteredContracts): void { Assert::minCount($mergeWithContractIds, 2); /** @var Details $contractsToMerge...

When, where and how to create Summary Events

Thanks for your feedback @dgafka . We prefer to create our read models asynch and run the projections as long-running processes. I added approach **3**. We load the read model...

How to merge event-sourced aggregate roots (A+ES) with Prooph PDO event stream

Actually `MergedEmploymentContract` is NOT an aggregate root. It's just a factory using the typical `recordThat` method of prooph which indeed is include in the `AggregateRoot` class. But that one is...

Where and how to handle command (superficial) and domain validation?

Stupid me, forgot the Command: ```php

Where and how to handle command (superficial) and domain validation?

Some details of the examples are inconsistent e.g. the doc block should hint to the primitive values. Please ignore.

Where and how to handle command (superficial) and domain validation?

I get your point. But I would not regard this a "duplication". Each layer has its own validation. We have command DTOs inside the `Application` layer. Sometimes some "aggregate-spanning" validation...

Where and how to handle command (superficial) and domain validation?

Possibly related: > In practice, it is often simpler to allow a degree of duplication rather than to strive for complete consistency. @eulerfx * http://gorodinski.com/blog/2012/05/19/validation-in-domain-driven-design-ddd/ Or in the comments section...

Read models vs. View models

Similar question by @cer: > Another #eventstorming question: Read Models are typically depicted as being consumed by humans. But arguably a command triggered by, for example, a policy needs a...

Applying domain events to aggregate roots when deserializing payload of old events break current value object constraint changes

Thoughts @prolic ? @matthiasnoback maybe? This reminds me of your example in chapter "3.4. Using value objects with internal read models" of your new book "Web application architecture": * https://leanpub.com/web-application-architecture...

Applying domain events to aggregate roots when deserializing payload of old events break current value object constraint changes

Interesting read by @heynickc : > When we replay these events to reconstitute the state of an Aggregate, if the Value Object has a new invariant that makes the Event...