homepage/_posts/2017-06-23-today-i-learned-1.md

ID	post_title	author	post_excerpt	layout	permalink	published	post_date
147	Today I Learned #1	dreat		post	http://dreat.info/2017/06/23/today-i-learned-1/	true	2017-06-23 21:22:01

While using EntityFramework in my integration tests (which is a separate topic ;) ) I discovered quite interesting thing. I guess this may be obvious to some, but I learned Entity "the hard way" jumping into an app with Entity already in place and had to adapt - this was my first app with a database by the way.

So if you add entities to your context I'm used to adding all entities to context, so the code would look like [csharp] using (var ctx = new Context()) { var first = new FirstEntity { .. }; var second = new SecondEntity { .. };

ctx.FirstEntities.Add(first);
ctx.SecondEntities.Add(second);
ctx.SaveChanges();

} [/csharp]

But if entities are related, you can safely do this [csharp] using (var ctx = new Context()) { var first = new FirstEntity { .. }; var second = new SecondEntity { Relation = first };

//this will also take care of the first one!
ctx.SecondEntities.Add(second); 
ctx.SaveChanges();

} [/csharp] Or even this! [csharp] using (var ctx = new Context()) { var second = new SecondEntity { Relation = new FirstEntity{ .. } };

ctx.SecondEntities.Add(second);
ctx.SaveChanges();

} [/csharp]

It's nice and saves some typing! :)