EF Core Check Constraint Getting Started

EFCore.CheckConstraints is a NuGet library for Microsoft.EntityFrameworkCore that allows you to specify check constraints in SQL. The check constraints in SQL help you tighten your data model and ensure that no inconsistent or invalid data ever makes it into your tables. It also allows you to define arbitrary validation for the rows of a table.

Installation

You can easily install it from the Package Manager Console window by running the following command.

PM> Install-Package EFCore.CheckConstraints

Environment Setup

To start using the EFCore.CheckConstraints in your application, you will need to install the EFCore.CheckConstraints NuGet package.

Let's open the Visual Studio and create a new project.

Select the Create a new project option.

Choose C# as language, Windows as a platform, and Console as the project type. In the template pane, select Console Application and click the Next button.

Enter the project name, you can change the location and solution name, but we will leave it and click on the Next button.

On the Additional Information dialog, select the target framework and then click on the Create button.

You can see a new console application project is created. Now to install an EFCore.CheckConstraints, right-click on the project in Solution Explorer, and select Manage NuGet Packages...

Select the Browse tab and search for EFCore.CheckConstraints and install the latest version by pressing the Install button.

Once EFCore.CheckConstraints has been successfully installed. Let's add the database provider that you want to target. We will use SQL Server, and the provider package is Microsoft.EntityFrameworkCore.SqlServer. We can easily install that NuGet package by executing the following command in Package Manager Console.

PM> Install-Package Microsoft.EntityFrameworkCore.SqlServer

You are now ready to start your application.