![]() How do I use Multiple Contexts? / How do I set up Identity Server 4 to use Entity Framework? Stick to using synchronous methods, or the. Be careful though, you cannot use async await here, as it buggers up the pipeline. If you noticed, I also like to seed the database at this point as well as it will only run once per application startup. Rest of the application startup omitted Log.Error(ex, "Failed to migrate or seed database") I'm using Serilog here, but use the logging solution of your choice. Migrate and seed the database during startup. Public void Configure(IApplicationBuilder app, IHostingEnvironment env, ILoggerFactory loggerFactory) Use this method to configure the HTTP request pipeline. ![]() This method gets called by the runtime. Start by adding the following Nuget Packages to your Data class library, using the Nuget Package Management screen or by editing the Data project’s. If you don’t need Identity, don’t worry, you can just leave it out. My example today will include ASP.NET Identity using Microsoft SQL Server, as I think this will cover the majority of use cases. To hold our migrations and database context, we’ll create a. These steps are roughly the same, regardless if you’re upgrading to csproj project format or just creating a new class library.ġ. Luckily, since quite recently, the steps to enabling migrations have been simplified (Don’t worry there’s still planty to do). Starting from Scratch, Migrating from project.json or Using a Class Libraryįor the rest of us, especially those who appreciate good system architecture, we’re going to be setting up a separate class library to hold our migrations and Database Context. If you’re lucky enough to be starting a brand new project and it’s relatively small, Entity Framework Core migrations are already enabled for use when you select the “Individual Accounts” option from the file new project screen. Bonus! There are examples for ASP.NET Identity and even Identity Server 4. In the third iteration of this series I once again show you how to enable migrations, this time including class libraries and multiple contexts. Entity Framework Core Migrations have changed once more thanks to Visual Studio 2017 and the.
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