Feb 7, 2011 · An entity is a term from the entity-relationship model. A relational model (your database schema) is one of the ways to implement the ER model. Relational tables represent relations between simple types like integers and strings, which, in their turn, can represent everything: entities, attributes, relationships.

Oct 10, 2017 · To update an entity with Entity Framework Core, this is the logical process: Create instance for DbContext class; Retrieve entity by key; Make changes on entity's properties; Save changes; Update() method in DbContext: Begins tracking the given entity in the Modified state such that it will be updated in the database when SaveChanges() is called.

This solution is effective within a project that is dependent on Entity Framework Core 7. Remove-Migration -Force This command will: Reverts the effects of the most recently applied migration on the database without necessitating the use of the "Update-Database" command. Deletes the associated migrations and snapshots. IMPORTANT

dotnet ef migrations add MyFirstMigration dotnet ef database update I don't want end user to enter these but prefer the app to create and setup the database on first use. For EF 6 there is : Database.SetInitializer(new CreateDatabaseIfNotExists<MyContext>()); But I can't find any equivalent for EF Core.

Mar 16, 2016 · If you don't have an existing View at database you should create like below: db.Database.ExecuteSqlRaw( @"CREATE VIEW View_BlogPostCounts AS SELECT b.Name, Count(p.PostId) as PostCount FROM Blogs b JOIN Posts p on p.BlogId = b.BlogId GROUP BY b.Name"); And then you should have a class to hold the result from the database view:

Sep 17, 2014 · To update an existing entity, all you need to do is set the tracking state to Modified. According to the EF6 docs: If you have an entity that you know already exists in the database but to which changes may have been made then you can tell the context to attach the entity and set its state to Modified. For example:

Jan 20, 2011 · A weak entity is the entity which can't be fully identified by its own attributes and takes the foreign key as an attribute (generally it takes the primary key of the entity it is related to) in conjunction. Examples. The existence of rooms is entirely dependent on the existence of a hotel. So room can be seen as the weak entity of the hotel.

In Entity Framework 7 you can set this in DbContext / IdentityDbContext's constructor: this.Database.SetCommandTimeout(180); – Thomas Hagström Commented May 18, 2016 at 8:00

dotnet ef dbcontext scaffold "Server=(localdb)\v11.0;Database=Blogging;Trusted_Connection=True;" Microsoft.EntityFrameworkCore.SqlServer -o Models -f However, you should consider using Migrations to keep your model and database schema in sync with each other. That way you make changes to the model and then propagate them to the database.

The equivalent syntax in EF Core is just Update-Database 0.Regardless, this isn't a good fit for the OP's case where "The update history seems to be out of sync"; this approach works by running the "Down" migration for every migration so far applied to the database, so if you've deleted a migration that was previously applied then this will fail (and it may similarly fail if …