Notice how, starting with EF Core 9, properties of any mapped type can be used in the partition key. For bool and numeric types, like the int SessionId property, the value is used directly in the partition key. Other types, like the Guid UserId property, are automatically converted to ...
Alternatively you can continue investigating yourself and look into why this conversions happens. There are multiple ways to "debug into" a library, for example you could try to set breakpoints in EF Core functions (by function name) and look at the stacktrace you break and repeat until you c...
EF Core uses “discriminator synthesis” to determine which table the data comes from, and hence the correct type to use. This works because the LEFT JOIN returns nulls for the dependent ID column (the “sub-tables”) which aren’t the correct type. So for a dog, [d].[Id] will be ...
Entity Framework Core Entity Framework 6 Overview What's new Get started Fundamentals Create a model Overview Use Code First Use EF Designer Workflows Data types Split mappings Inheritance mappings Map stored procedures Map relationships Multiple diagrams Select runtime version Code generation Advanced EDMX...
using ContosoUniversity.Models; using Microsoft.AspNetCore.Mvc; using Microsoft.AspNetCore.Mvc.RazorPages; using Microsoft.EntityFrameworkCore; using Microsoft.Extensions.Logging; using System; using System.Threading.Tasks; namespace ContosoUniversity.Pages.Students { public class DeleteModel : PageModel {...
builder.HasOne(x => x.ControlType) .WithMany(x => x.Properties) .IsRequired() .HasForeignKey("ControlType"); I want to use EF Core to map a legacy database. I cannot scaffold as there are hundreds of tables and I am only interested in very few. The situat...
When using multiple properties with backing fields with an owned type with the InMemory database, inserting an entity into the database and calling SaveChanges() causes an exception. This does not happen if there is only one property wit...
However, in our code,we may find it useful to have all this information inside one entity. In this way, when we will be making a query for an entity, EF Core will automatically make a join between those tables and provide us with the full entity data. Moreover, when we create, updat...
EF Core 5.0 supports many-to-many relationships without explicitly mapping the join table. For example, consider these entity types: Copy public class Post { public int Id { get; set; } public string Name { get; set; } public ICollection<Tag> Tags { get; set; } } public class Tag {...
Tuning up my EF Core query Making sure EF Core could translate all parts of my LINQ query to SQL Tweaking my query by adding a user defined function Going SQL – moving the query to Dapper Modifying the database – adding cached values (this is running onefcoreinaction.com) ...