This approach is useful in Domain-Driven Design (DDD), i.e., creating the database tables based on the Domain classes. Then, based on the application domain classes and DBContext class, the EF Core creates the database and related tables. For a better understanding, please have a look at the following diagram. Entity Framework is the tool that makes mapping objects in software to the tables of a relational database simpler. This late-bound or “weakly-typed” approach to data access is prone to error.
The above example defines a Category model with an ID and a Name, along with a list of Product items. Starting a new project with Entity Framework Core begins with creating an ASP.NET Core web application. Utilize the .NET Core CLI or Visual Studio to scaffold a new project.
Why Entity Framework Core
Now copy and paste the following code in the main method of the program class as shown below. From our next article onwards, I am going to explain everything in detail. Once you click on the Next button, it will open a popup asking you to choose the Entity Framework version as shown below. From this window, select Entity Framework 6.x and click on the Next button as shown in the below image. Once you click on the Next button, It will open choose your data connection wizard as shown below. From this window click on the New Connection button as shown in the below image.
Most developers are willing to make those trade-offs for increased developer productivity, a high-level database access abstraction, and unit testing options. If you’re working on an existing project that already using https://deveducation.com/ 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.
Additionally, we can ask Rider to diagram our database tables, showing the relationships that we modeled during the code-first design phase of this tutorial. Additionally, we will want to install the dotnet-ef command-line tool (CLI). From within the newly created project directory type the following commands into Rider’s integrated terminal. EF Core supports two development approaches 1) Code-First 2) Database-First.
Once you click on the OK button, you will be back on to the “Choose Your Data Connection” window as shown below. Once the database is ready, in the next step, create a new “Console Application” with the name EFDemo as shown in the below image. Please use the below SQL script to create the database EF_Demo_DB, and tables Departments and Employees, and populate the tables with sample data.
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. advantages of entity framework Likely the most complex query in this list, let’s find actors playing characters in different productions. We’ll need to start at the Actors entity and navigate through the Characters collection while including the Production information.
- While we could use the types we’ve created in our EntertainmentDbContext, it’s essential to our app’s performance to return results we will use in our code.
- In VS, open NuGet Package Manager Console Tools – NuGet Package Manager- PMC and code the following command to create Migration.
- The application targets .NET Core, e.g., ASP.NET Core Applications.
- From my previous experience with Entity Framework 6, I find the generated SQL of EF Core more readable and concise.
- It was originally shipped as an integral part of .NET Framework, however starting with Entity Framework version 6.0 it has been delivered separately from the .NET Framework.