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Mastering Entity Framework Core 2.0

You're reading from   Mastering Entity Framework Core 2.0 Dive into entities, relationships, querying, performance optimization, and more, to learn efficient data-driven development

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Product type Paperback
Published in Dec 2017
Publisher Packt
ISBN-13 9781788294133
Length 386 pages
Edition 1st Edition
Languages
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Author (1):
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Prabhakaran Anbazhagan Prabhakaran Anbazhagan
Author Profile Icon Prabhakaran Anbazhagan
Prabhakaran Anbazhagan
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Toc

Table of Contents (13) Chapters Close

Preface 1. Kickstart - Introduction to Entity Framework Core FREE CHAPTER 2. The Other Way Around – Database First Approach 3. Relationships – Terminology and Conventions 4. Building Relationships – Understanding Mapping 5. Know the Validation – Explore Inbuilt Validations 6. Save Yourself – Hack Proof Your Entities 7. Going Raw – Leveraging SQL Queries in LINQ 8. Query Is All We Need – Query Object Pattern 9. Fail Safe Mechanism – Transactions 10. Make It Real – Handling Concurrencies 11. Performance – It's All About Execution Time 12. Isolation – Building a Multi-Tenant Database

Composing with LINQ

We have performed flat SQL queries so far. This doesn't involve LINQ queries. If we had a mechanism that could leverage flat queries composed of LINQ to SQL queries, then we could get the best of both worlds. Fortunately, we do have built-in support in Entity Framework, and the flat SQL queries could be composed of LINQ queries, and we will cover them in detail in this section.

Let's comment the current implementation in LatestBlogs() and perform the SP implementation using flat queries composed with LINQ. Ideally, what we are trying to achieve is to get the table data using a LINQ query and compose the result with a LINQ query to perform filtering and ordering from a LINQ query (this might not be a real-world scenario, but it works well for illustration):

    public async Task<IActionResult> LatestBlogs()
{
//return View("Index...
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