How to Properly Implement Lazy Loading with Entity Framework Core 6 and Avoid N+1 Query Issues?
I keep running into I'm sure I'm missing something obvious here, but I'm working with Entity Framework Core 6, and I'm trying to implement lazy loading in my application. However, I'm running into an N+1 query question that I need to seem to resolve. I've enabled lazy loading by using proxies, but when I access navigation properties in a loop, it seems to be executing an additional query for each related entity, which is inefficient. Here's a simplified version of my code: ```csharp public class Blog { public int BlogId { get; set; } public string Url { get; set; } public virtual ICollection<Post> Posts { get; set; } } public class Post { public int PostId { get; set; } public string Title { get; set; } public int BlogId { get; set; } public virtual Blog Blog { get; set; } } public async Task<List<Blog>> GetBlogsAsync() { using (var context = new BloggingContext()) { return await context.Blogs.ToListAsync(); } } var blogs = await GetBlogsAsync(); foreach (var blog in blogs) { // This line triggers a separate query for each blog's posts due to lazy loading. var postCount = blog.Posts.Count; } ``` I've tried switching to eager loading with `.Include(b => b.Posts)` in my query, but it feels like I'm over-fetching data when I might not need all posts in every scenario. Is there a best practice to balance between eager loading and lazy loading to avoid these N+1 problems while still keeping performance in check? Any insights on how to effectively manage this would be greatly appreciated. This is part of a larger API I'm building. Am I missing something obvious? This issue appeared after updating to C# 3.9. Has anyone else encountered this?