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Fix to #2873 - ThenInclude required? #2878

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merged 1 commit into from
Nov 16, 2020
Merged

Fix to #2873 - ThenInclude required? #2878

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5 changes: 5 additions & 0 deletions entity-framework/core/querying/related-data/eager.md
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Original file line number Diff line number Diff line change
Expand Up @@ -41,6 +41,11 @@ You may want to include multiple related entities for one of the entities that i

[!code-csharp[Main](../../../../samples/core/Querying/RelatedData/Program.cs#MultipleLeafIncludes)]

> [!TIP]
> You can also load multiple navigations using a single `Include` method. This is possible for navigation "chains" that are all references, or when they end with a single collection.

[!code-csharp[Main](../../../../samples/core/Querying/RelatedData/Program.cs#IncludeMultipleNavigationsWithSingleInclude)]

## Filtered include

> [!NOTE]
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22 changes: 16 additions & 6 deletions samples/core/Querying/RelatedData/Program.cs
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Expand Up @@ -65,6 +65,19 @@ static void Main(string[] args)
}
#endregion

#region IncludeTree
using (var context = new BloggingContext())
{
var blogs = context.Blogs
.Include(blog => blog.Posts)
.ThenInclude(post => post.Author)
.ThenInclude(author => author.Photo)
.Include(blog => blog.Owner)
.ThenInclude(owner => owner.Photo)
.ToList();
}
#endregion

#region MultipleLeafIncludes
using (var context = new BloggingContext())
{
Expand All @@ -77,15 +90,12 @@ static void Main(string[] args)
}
#endregion

#region IncludeTree
#region IncludeMultipleNavigationsWithSingleInclude
using (var context = new BloggingContext())
{
var blogs = context.Blogs
.Include(blog => blog.Posts)
.ThenInclude(post => post.Author)
.ThenInclude(author => author.Photo)
.Include(blog => blog.Owner)
.ThenInclude(owner => owner.Photo)
.Include(blog => blog.Owner.AuthoredPosts)
.ThenInclude(post => post.Blog.Owner.Photo)
.ToList();
}
#endregion
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