ef-core-5.0

问题 After migrating from .NET Core 2.x to .NET Core 5.0, we are facing this problem. Error: (Added as a CODE for better readability) The LINQ expression 'OUTER APPLY Projection Mapping: ( SELECT e0.Id, e0.FirstName, e0.MiddleName, e0.LastName FROM Employees AS e0 WHERE (((e0.Status != 4) && EXISTS ( Projection Mapping: SELECT 1 FROM FunctionRoles AS f0 WHERE t.Id == f0.SchoolId)) && (e0.FunctionRoleId == (Projection Mapping: EmptyProjectionMember -> 0 SELECT TOP(1) f1.Id FROM FunctionRoles AS f1

问题 I have an ASP.NET Core 5 project (migrated from ASP.NET Core 3.1). The project uses EF Core. EF Core 5 has built-in support for Many-to-Many. The main reason I first migrated from 3.1 to 5.0. Now my project has a One-to-Many relationship, which I want to convert to a Many-to-Many. Is such a relationship migration possible? Current code: public class File { [DatabaseGenerated(DatabaseGeneratedOption.Identity)] [Key] public int Id { get; set; } [DatabaseGenerated(DatabaseGeneratedOption

问题 Using EF Core, I have a Zone that can have multiple Sol (soils), same Sol can be attached to multiple Zone : public class Sol { // ... public ICollection<Zone> Zones { get; set; } = new List<Zone>(); } public class Zone { // ... public ICollection<Sol> Sols { get; set; } = new List<Sol>(); } public override void Configure(EntityTypeBuilder<Zone> builder) { // ... builder .HasMany(p => p.Sols) .WithMany(p => p.Zones); } When adding my Sols to a Zone however I get the following exception:

问题 EF Core: I need to get the name of the table as the name of the entity, not dbset, also, I need the Id to be "tableName"+"Id" . I have a DbSet<Country> Countries - I need table name Country and Id column (inherited from base entity) to be CountryId . I started with this code that works: foreach (var entity in modelBuilder.Model.GetEntityTypes()) { var builderEntity = modelBuilder.Entity(entity.Name); // make table name to be entity name builderEntity.ToTable(entity.DisplayName()); // make Id

问题 EF Core: I need to get the name of the table as the name of the entity, not dbset, also, I need the Id to be "tableName"+"Id" . I have a DbSet<Country> Countries - I need table name Country and Id column (inherited from base entity) to be CountryId . I started with this code that works: foreach (var entity in modelBuilder.Model.GetEntityTypes()) { var builderEntity = modelBuilder.Entity(entity.Name); // make table name to be entity name builderEntity.ToTable(entity.DisplayName()); // make Id

问题 I've just upgraded my project from .NET Core 3.1 to .NET 5.0 and updating all packages to the latest version. All built fine, but now I'm having trouble loading some entities, getting this error: Unable to cast object of type 'Microsoft.EntityFrameworkCore.Query.Internal.BufferedDataReader' to type 'Microsoft.Data.SqlClient.SqlDataReader'.' I'm not certain, but I have a couple of entities which have an Address property which is an [Owned] type which has a NetTopologySuite.Geometries.Point

问题 How to change name of a join table that EF Core 5 Created ? for example public class Food { public int FoodId { get; set; } public string Name { get; set; } public string Description { get; set; } public string Ingredients { get; set; } public string PhotoPath { get; set; } public ICollection<Menu> Menus { get; set; } } public class Menu { public int MenuId { get; set; } [Column(TypeName = "date")] public DateTime MenuDate { get; set; } public bool IsPublished { get; set; } public ICollection

问题 How to change name of a join table that EF Core 5 Created ? for example public class Food { public int FoodId { get; set; } public string Name { get; set; } public string Description { get; set; } public string Ingredients { get; set; } public string PhotoPath { get; set; } public ICollection<Menu> Menus { get; set; } } public class Menu { public int MenuId { get; set; } [Column(TypeName = "date")] public DateTime MenuDate { get; set; } public bool IsPublished { get; set; } public ICollection