entity-framework-core

I have done scaffolding of my SQLServer database. And it creates the POCO objects in the specified folder. What i would like to do is that it extends from my base class. I also use repository pattern so i need to have Id key on every entity and I don't want to change that each time i rescaffold the database. Scaffold Model Example public partial class Food { public int Id { get; set; } public string Name { get; set; } public string Description { get; set; } public double Price { get; set; } } Expected Result: public partial class Food : EntityBase { public string Name { get; set; } public

Is it possible to add CHECK constraint with fluent API in Entity Framework 7? I need to acheive something like this: ... ADD CONSTRAINT CK_SomeTable_SomeColumn CHECK (SomeColumn >= X); It is ok if solution is provider-specific - I am targeting MsSqlServer only (at least now). As of EF 7.0.0-rc1, it isn't possible with the fluent API. You can define the constraint manually in the migration migrationBuilder.Sql("ADD CONSTRAINT CK_SomeTable_SomeColumn CHECK (SomeColumn >= X);"); Lukas Kabrt is still valid in 2019 so I had to create a special migration that I will include constraint and its drop:

I have an Entity Framework Core + ASP.NET Core application and when my application starts up I want to ensure that the database is created, and eventually (once I have migrations) I want to ensure that those are also run. Initially I put Database.EnsureCreated() into the constructor of my DbContext but that appears to run every time someone hits my application since a new instance of the DbContext is created each time. I tried to put it into my startup code, but I need an instance of my DbContext to do that and it is unclear how exactly to get one. I am configuring EF as so: serviceCollection

Looking to get metadata in EF Core, to work with the mappings of objects & properties to database tables & columns. These mappings are defined in the DBContext.cs OnModelCreating() method, mapping tables with .ToTable(), and columns via .Property.HasColumnName(). But I don't see this metadata under the Entity Types returned by... IEnumerable<IEntityType> entityTypes = [dbContext].Model.GetEntityTypes(); Is this metadata available anywhere in EF Core? Ivan Stoev Is this metadata available anywhere in EF Core? Yes it is. Just additionally to the properties examine the methods ( GetXXX , FindXXX

I use Entity Framework Core 2.0 and have this 2 classes: News public class News { public int Id { get; set; } public string Title{ get; set; } public string Text { get; set; } public DateTime ReleaseDate{ get; set; } public int AuthorID{ get; set; } public Author Author{ get; set; } } Author public class Author { public Author () { News = new List<News>(); } public int Id { get; set; } public string Username{ get; set; } public string Firstname{ get; set; } public string Lastname{ get; set; } public ICollection<News> News {get;set;} } I want to load the news with the author's username only

Getting exposed to dotnet Core. In a sample test application trying to setup EntityFramework.Core in dotnet core app. While I was able to add the EntityFramework.Core NugGet package I can't find the 'Add'->'New Item'->'Data'->'ADO.NET Entity Data Model' Is this not possible with EntityFramework.Core? How does EntityFramework.Core differ from EntityFramework 7? There is no edmx support in Entity Framework Core. It only supports a code-first approach. The option to add a new Entity Data Model will be added, but it will produce entity class files instead of an edmx file. The tooling development