We can then add our this filter to our startup pipeline by editing our startup.cs file like so : services. If you ever made use of the global.asax startup methods in Full Framework. This command will enable migration in our project by creating the Configuration class within the Migration folder in our application. I actually havenât made much use of them in the past but recently Iâve found them to be incredibly handy. They intercept the startup process and do âsomethingâ before the application starts, and only on startup. NET Core are basically like Filters in MVC. Using (var scope = ())įoreach (var context in ()) The code looks like so : public class MigrationStartupFilter : IStartupFilter where TContext : DbContext NET Core has this new paradigm of a âStartupFilterâ. For example, a single machine of a low use web app probably doesnât need all the bells and whistles for a separate database rollout, it just needs to be on the latest version at any given time.įor that. NET CLI, add under node by editing your.NET Core Command List Interface to execute entity framework core commands. This is good for projects that the timing of the database migration really doesnât matter or is an incredibly small rollout window. Command Line Interface Commands for Migrations Use. In some cases, you really donât care when migrations are run, you just want them to migrate the database when the app starts. Simply, API project includes all the controllers and other logic, whereas the Data project includes the models, context, repository and migrations. For example, if you roll a manual process of updating the production database, it can be useful to see if itâs actually up to date. 1 I'm creating an ASP.NET Core API, and I have one project in my solution named MyProj.API and another project named MyProj.Data. Even then, it can be useful to know which state the database is in from an admin panel or similar just to diagnose production issues. task: PowerShell2 displayName: 'Apply migrations' inputs: targetType: 'inline' script: dotnet ef database update -project (Build.SourcesDirectory)\DataLayer\DataLayer entity-framework powershell. It can also be extremely handy checking which migrations need to be run before attempting to run them. Thatâs it! Crazy crazy simple! Checking Pending Migrations Where _context is simply your database context. Related posts: Migrating EF Core Database From C#.
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