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ASP.NET MVC 2 validation using DTOs instead of domain entities


ASP.NET MVC 2 validation using DTOs instead of domain entities

By : user3861721
Date : November 21 2020, 07:01 PM
I hope this helps . You shouldn't have more than one DTO per entity, so you should only have to apply the validation attributes once per DTO. If you need multiple entities for a View, include multiple DTO's as properties of your ViewModel.
code :


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Validation on domain entities along with MVP

Validation on domain entities along with MVP


By : Sam
Date : March 29 2020, 07:55 AM
this one helps. Constraining something like the name of a person probably does not rightfully belong in the domain model, unless in the client's company there is actually a rule that they don't do business with customers whose names exceed 96 characters.
String length and the like are not concerns of the domain -- two different applications employing the same model could have different requirements, depending on the UI, persistence constraints, and use cases.
JPA Entities and/vs DTOs

JPA Entities and/vs DTOs


By : Economist1971
Date : March 29 2020, 07:55 AM
hope this fix your issue I would go for the DTO option for the following reasons:
The service interface should be independant of the database, a change in one should not always require a change in the other. You are making an assumption that your services will always be called by a Java client Using lazy loading when the object is on the otherside of a web service call does not work well.
Localizing validation messages from Domain Objects (Entities)

Localizing validation messages from Domain Objects (Entities)


By : Harold Raunig
Date : March 29 2020, 07:55 AM
help you fix your problem Not sure how helpful this response is to you, but localization is really a front-end concern. Localizing exceptions messages as per your example is not common practice, as end users shouldn't see technical details such as those described in exception messages (and whoever will be troubleshooting your exceptions probably has a sufficient level English even if it is not their native language).
Of course if necessary you can always handle exceptions and present a localized, user-friendly message to your users in your front-end. But keeping it as a font-end concern should simplify your architecture.
Should domain entities hold any data format validation?

Should domain entities hold any data format validation?


By : Egwuatu Valentine
Date : March 29 2020, 07:55 AM
I hope this helps you . There is user input validation (usually input format) and business rules. The input validation makes sense to be done at the entry point (usually a controller and depending on a framework it can be automatically done), there's no benefit in sending invalid data forward for processing.
However, the domain contains most of the input validation rules so it seems you have to choose between keeping the rules inside the Domain or repeating yourself. But you don't have to, because the input validation can be easily encapsulated into value objects (VO) so they are part of the domain but you can still use them outside the domain to validate the input.
How to properly convert domain entities to DTOs while considering scalability & testability

How to properly convert domain entities to DTOs while considering scalability & testability


By : user7644226
Date : March 29 2020, 07:55 AM
it should still fix some issue I have read several articles and Stackoverflow posts for converting domain objects to DTOs and tried them out in my code. When it comes to testing and scalability I am always facing some issues. I know the following three possible solutions for converting domain objects to DTOs. Most of the time I am using Spring. ,
Solution 1: Private method in the service layer for converting
code :
public interface Mapper<S,T> {
     public T map(S source);
     public S map(T target);
}
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