54 lines
1.3 KiB
Markdown
54 lines
1.3 KiB
Markdown
---
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post_title: 'Today I Learned #1'
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author: dreat
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layout: post
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published: true
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post_date: 2017-06-23 21:22:01
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tags: [archived, til, csharp]
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categories: [til, theory, old_blog]
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---
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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.
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So if you add entities to your context I'm used to adding all entities to context, so the code would look like
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```csharp
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using (var ctx = new Context())
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{
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var first = new FirstEntity { .. };
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var second = new SecondEntity { .. };
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ctx.FirstEntities.Add(first);
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ctx.SecondEntities.Add(second);
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ctx.SaveChanges();
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}
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```
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But if entities are related, you can safely do this
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```csharp
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using (var ctx = new Context())
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{
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var first = new FirstEntity { .. };
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var second = new SecondEntity { Relation = first };
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//this will also take care of the first one!
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ctx.SecondEntities.Add(second);
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ctx.SaveChanges();
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}
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```
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Or even this!
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```csharp
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using (var ctx = new Context())
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{
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var second = new SecondEntity { Relation = new FirstEntity{ .. } };
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ctx.SecondEntities.Add(second);
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ctx.SaveChanges();
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}
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```
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It's nice and saves some typing! :)
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