C#C
C#•4y ago
WibblyWobbly

MediatR and CQRS for basic logic

So started doing abit of MediatR CQRS pattern in abit of Clean Architecture. I've been doing the Query and Commands for Database / API stuff as the articles suggest but what about general business logic?

Say I have a List of People and I want to capitalize all their Surnames right so Wibbly Wobbly becomes Wibbly WOBBLY and find people aged 30 and above.

Would it be:

        public async Task<IEnumerable<People>> GetPeopleOver30WithCapitalSurname()
        {
            IEnumerable<People> people = await _mediator.Send(new GetPeopleQuery());
            return await _mediator.Send(new ToCapitalSurnameAndOver30(people));
        }
        


ToCapitalSurnameAndOver30
 simply takes a list 
foreach person in people
, gets the surname 
ToUpperCase()
 and 
if (person.Age > 30)
 add to another list maybe.
Nothing fancy but using 
_mediator.Send()
 to get to this logic

or:
        public async Task<IEnumerable<People>> GetPeopleOver30WithCapitalSurname()
        {
            IEnumerable<People> people = await _mediator.Send(new GetPeopleQuery());
            return await _myService.ToCapitalSurnameAndOver30(people)
        }

As you might find with most stuff.

In other words, should you use it for the majority of logic or just API/Database stuff.
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