ef core (rc2)

Ido Flatow

Entity Framework Core (EF Core) 1.0

Join the conversation on Twitter: #ndcoslo // @NDC_Conferences // @idoFlatowJoin the conversation on Twitter: #ndcoslo // @NDC_Conferences // @idoFlatow

Join the conversation on Twitter: #ndcoslo // @NDC_Conferences // @idoFlatow

About MeSenior Architect, Sela GroupMicrosoft Regional Director, and an ASP.NET/IIS MVPCo-author of courses and booksFocus on server, web, and cloud


Entity Framework Project Status

New runtime components on NuGetCore runtime components in .NETTooling in Visual Studio

Runtime in .NET FrameworkTooling in Visual Studio

Runtime on NuGetTooling on Microsoft Download CenterLatest version included in Visual Studio

Entity Framework 3.5 SP1

Entity Framework 4

Entity Framework 4.x

Entity Framework 5

Entity Framework 6.x

Entity Framework 6.2 Entity Framework Core 1.0


TodayWritten to target relational databasesEF6.x DLL files are over 5MBRuns only on full .NET FrameworkNo support for batch updates


EF Core Key FeaturesRewritten from the ground up to be lightweight (under 1MB)New platforms & data storesIoC friendly and extensibleOptimized query generationCode-First onlyBatching


.NET FRAMEWORK .NET CORE XAMARINAP

PM

ODEL

SBA

SELI

BRAR

IES

Base Class Library Core Library Mono Class Library

ASP.NET

Windows FormsWPF UWP

ASP.NET Core

iOSAndroid

Compilers Languages Runtime components

COMMON INFRASTRUCTURE

OS X

New Platforms

EF6.x EF Core


New Data StoresRelational & non-relational

Not a magic abstractionHigh level services that are useful on all/most storesNon-common concerns handled by provider extensions

Example providersRelational (SQL Server, SQLite, Postgres, SQL Compact etc.)In Memory (for testing)Azure Table StorageRedis cache

Just relational providers for v1.0


Lightweight & Extensible CoreSame top level experience as EF6.x

Still DbContext/DbSet etc.New core

Core = metadata, change tracking, query pipeline, etc.Built as a collection of services with dependency injectionEasier to replace/extend servicesReplace confusing APIs & behavior

Optimized for memory and CPU usagePay-per-play components


EF6.x – The End?!Will continue to be a supported releaseMicrosoft will continue with bug fixes and small improvements to the code baseFirst preview of EF6.2 will be available shortly after EF Core reaches RTM


Some New FeaturesMixed C#/database eval in LINQ queriesBatch saveSQL query improvementsShadow state propertiesAlternate keysTrackGraph API

Demo


EF Core Basics

Demo


LINQ and SQL Query Improvements

Demo


Simplified Metadata API

Demo


Extensible Core

Demo


New Data Stores

Demo


New Features

Demo


New Platforms


EF Core 1.0 Feature Status (condensed version)Backlog

Lazy loadingComplex value typesStored procedure mappingData seedingUpdate model from databaseMany-to-many relationships without a join entityInheritance mapping with TPT and TPCCommand interception

In ProgressBug fixingPerformance improvementsLINQ improvementsDocumentation and Intellisense

Thrown outEDMXEntity SQLObjectContext API


EF Core & EF6.xEF6.x will be the right choice for many applicationsCarefully evaluate requirements if considering EF Core

Some important features not implemented in 1.0 (e.g. lazy loading, stored procedure mapping, etc.)Less mature code base (e.g. LINQ translator has limitations)

EF6.x to EF Core is “port” not “upgrade”Very basic code will port easilyMany APIs have changed drasticallyBeware of behavior differences in similarly named APIs


When to Use EF Core?New applications that do not need the features that are not yet implemented in EF Core

Applications that target .NET Core, such as Universal Windows Platform (UWP) and ASP.NET Core applications


Next StepsDocumentation

docs.efproject.netgithub.com/aspnet/EntityFramework/wiki/Roadmap

Repositoriesgithub.com/aspnet/EntityFrameworkgithub.com/rowanmiller/Demo-EFCore

Blogsblogs.msdn.microsoft.com/dotnetblogs.msdn.com/b/adonet (older)

My demo codegit.io/voYzr

ef core (rc2)

Technology