Since migrations are chronological, the prefix is an essential tool for making sense of the changes occurring to our schema. We’ll keep the subject simple, but we’ll also explore some important EF Core concepts. Our subject matter is Entertainment, both movies and television, which we’ll call Productions. I hope as folks read these sentences, they start to formulate the relationships in their mind. Entity Framework has come a long way since its original inception.
In the code-first approach, EF Core API creates the database and tables using migration based on the conventions and configuration provided in your domain classes. This late-bound or «weakly-typed» approach to data access is prone to error. Consequently, professional developers prefer to work with data in a strongly-typed manner.
Entity Framework Core Architecture
Object-Relational Mapper (ORM) is a kind of bridge between strongly-typed objects and a relational data source. The purpose is to enable developers to work with the data stored in databases in an object-oriented way. To achieve that, EF Core ORM provides a map between the objects defined in the application domain and the data stored in the database. Before we answer these exciting questions, let’s talk about LINQ, also known as Language-Integrated Query syntax.
- These commands will allow us to create and execute a database migration that adds a People table, which will be accessible with our Person class.
- The Entity Framework Core, or EF Core, is the latest version of Entity Framework and completely rewrites from the ground up.
- Model First requires that we use the EDMX editor to create the data model.
- Both ORMs are great and work with any kind of project, from small-scale to massive enterprise-level applications.
There are multiple ways to insert data into our database, but it’s a good idea to use the data seed mechanism of EF Core for demos and necessary look-up values. In EF Core, we can override the OnModelCreating method on our EntertainmentDbContext. This repository contains a simple TodoList application built using Entity Framework Core (EF Core). In this application, we explore the fundamental concepts of setting up and using EF Core to interact with a database. This library implements the common ADO.NET abstractions for connections, commands, data readers, and so on. For more information, see Microsoft.Data.Sqlite on Microsoft Docs.
Actors playing characters in multiple productions
To do this, we may need to create classes such as Student, Department, Address, etc. Technically, we called these classes Domain classes or business objects. Entity Framework (EF) Core is an ORM (Object-Relational Mapper) Framework for data access in .NET Core. It was released along with .NET Core and is an Extensible, Lightweight, Open Source, and Cross-Platform Version of Entity Framework data access technology. It works on multiple operating systems like Windows, Mac, and Linux.
However, it can also be used with standard .NET 4.5+ framework based applications. Some people prefer to write all queries (Dapper) and some people prefer to work with LINQ (EF Core). Both ORMs are great and work with any kind of project, from small-scale to massive enterprise-level applications. Prepare a plan for possible failures such as version rollback, server fallback, etc. The Include method is used to specify the related entity (Books) that you want to load eagerly. The SQL statement is still very readable, even when we consider the answer we are returning from our database.
Relationships
To take full advantage of this Entity Framework Core Tutorials, you should have the basic knowledge of C# and any database such as SQL Server, Oracle, or MySQL to gain more knowledge of these tutorials. Having .NET Core, Visual Studio, and SQL Server installed on your computer is good. This is the first article of the Entity Framework Core article series, and in this article, what is entity framework I will give you an overview of Entity Framework Core. The Entity Framework Core, or EF Core, is the latest version of Entity Framework and completely rewrites from the ground up. Entity Framework Core is the new and improved version of Entity Framework for .NET Core applications. The following figure illustrates the supported application types, .NET Frameworks and OSs.
Entity Framework Core is a lightweight, extensible and cross-platform version of Microsoft’s object-relational mapper (ORM), Entity Framework is the official data access platform for Microsoft. Entity Framework Core uses a provider model to access many different databases. EF Core includes providers as NuGet packages which you need to install. Model First requires that we use the EDMX editor to create the data model.
Microsoft.Data.Sqlite
This editor creates entities, relationships, and inheritance hierarchies in the design surface. Once we have the data model classes and DbContext class created, we can use the Code First to generate the database. Database First suggests creating the data model from the existing database and tables. Great, now that we have built our entities and relationships, let’s add them to our DbContext instance, which we’ll call EntertainmentDbContext.
In this article, we won’t be using the AdventureWorks2022 database we used previously. This choice will allow us to address topics like migrations and the Code First approach, which we will discuss in detail later. If you’re working on an existing project that already using EF6 or one that is linked to the .NET Framework, it’s still a good option to use EF 6. However, if you are developing new projects, particularly projects targeting .NET Core or .NET 5/6+, EF Core is the best choice. EF Core’s flexibility, performance improvements, and cross-platform capabilities make it the perfect selection for modern application development. Entity Framework Core is the new version of Entity Framework after EF 6.x.
Entity Framework is an Object/Relational Mapping (O/RM) framework. It is an enhancement to ADO.NET that gives developers an automated mechanism for accessing & storing the data in the database. An ORM (Object-Relational Mapper) is used to interact with a database using an object-oriented programming language. ORMs allow developers to work with databases using familiar, object-oriented concepts, rather than writing raw SQL statements. Additionally, EF Core 8 optimizes change tracking and saving efficiency, albeit with considerations for SQL Server’s database triggers and computed columns.
We store each entity type within the same Productions table, which EF Core manages for us. Looking over our models, we can see some conventional patterns emerge. Naming is an essential part of EF Core modeling, where we define relationships by the Type of property definitions and their names.
Entity Framework Core is an ORM Tool that increases the developer’s productivity by reducing the redundant task of doing CRUD operations against a database in a .NET Core Application. Entity Framework Core (EF Core) is an ORM (Object-Relational Mapping) framework for the .NET platform. One of the key features of EF Core is its support for strong typing. Try to replicate the production environment in functional and integration testing as close as possible. It allows you to catch errors that can be caused by the server version’s compatibility. Here we offer you some Entity Framework performance tips that will help you achieve the best results.