11/22/2023 0 Comments Ef core powershell commandsThey intercept the startup process and do “something” 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 “StartupFilter”. For example, a single machine of a low use web app probably doesn’t 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. This is good for projects that the timing of the database migration really doesn’t matter or is an incredibly small rollout window. In some cases, you really don’t care when migrations are run, you just want them to migrate the database when the app starts. For example, if you roll a manual process of updating the production database, it can be useful to see if it’s actually up to date. 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. It can also be extremely handy checking which migrations need to be run before attempting to run them. That’s it! Crazy crazy simple! Checking Pending Migrations Where _context is simply your database context. Related posts: Migrating EF Core Database From C#.To see the examples, type: "get-help Update-Database -examples".įor more information, type: "get-help Update-Database -detailed".įor technical information, type: "get-help Update-Database -full". Updates the database to a specified migration. You can read -from as meaning "after", not "including". If you only want to script the most recent migration, the value to apply to the -from switch is the last migration that was applied. The script-migration command will script all migrations, regardless of whether they have been applied or not. To see the examples, type: "get-help Script-Migration -examples".įor more information, type: "get-help Script-Migration -detailed".įor technical information, type: "get-help Script-Migration -full". To see the examples, type: "get-help Scaffold-DbContext -examples".įor more information, type: "get-help Scaffold-DbContext -detailed".įor technical information, type: "get-help Scaffold-DbContext -full". Scaffolds a DbContext and entity types for a database. To see the examples, type: "get-help Remove-Migration -examples".įor more information, type: "get-help Remove-Migration -detailed".įor technical information, type: "get-help Remove-Migration -full". It should not be prefixed with a path separator (e.g. If you specify an alternative location with outputdir, the value will be rooted in the project directory. This will be created in the root of the project unless an alternative location is specified using the -outputdir switch. The migration files will be placed in a folder name Migrations by default. For example, the following output is generated as a result of typing get-help add-migration: Add-migration NAMEĪdd-Migration You can get further help for specific commands by typing get-help followed by the command name. Use-DbContext Sets the default DbContext to use. Update-Database Updates the database to a specified migration. Script-Migration Generates a SQL script from migrations. Scaffold-DbContext Scaffolds a DbContext and entity type classes for a specified database. Remove-Migration Removes the last migration. The following Entity Framework cmdlets are included. Entity Framework is Microsoft's recommended data access technology for new This topic describes the Entity Framework commands. Provides information about Entity Framework commands. The full range of commands can be found by typing get-help entityframework at the PM prompt: PM> get-help entityframework The commands that you execute to manage migrations from the Package Manager Console are largely the same as those for Entity Framework 6. If you want to use the Package Manager Console to execute migrations command, you need to ensure that the latest version of is added to your project.json file. The Package Manager Console is available within Visual Studio by going to Tools » Nuget Package Manager.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |