如何在带有实体框架核心1.0（EF7）的脚手架DbContext中使用数据库视图

问题描述

不幸的是， Entity Framework Core 1.0 （以前为Entity Framework 7）尚不支持视图，我正尝试使用表对其进行伪造。

Unfortunately Entity Framework Core 1.0 (formerly Entity Framework 7) does not yet support Views, and I'm trying to 'fake' it using a table.

但是脚手架 dotnet dbcontext ef脚手架命令当前无法识别或生成视图，我想要一个DbContext来允许查询视图和更新视图表。有办法做到吗？

However the scaffolding dotnet dbcontext ef scaffold command doesn't currently recognize or generate views, and I want a single DbContext which allows querying a view and updating of tables. Is there a way to do this?

这是我用来搭建DbContext的命令：

This is the command I use to scaffold the DbContext:

dotnet ef dbcontext scaffold -c MyStoreContext -o Model "Data Source=(local);Initial Catalog=DBNAME;Integrated Security=True" Microsoft.EntityFrameworkCore.SqlServer --force

（这会将我所有的模型类放在 Model 目录中，并强制

(This puts all my model classes in a Model directory, and forces them to be overwritten.)

注意：我实际上要使用View的原因是出于GROUP BY逻辑，而EF Core 1.0也不支持

Note: The reason I actually want to use a View is for GROUP BY logic, which isn't supported either in EF Core 1.0

推荐答案

对我来说，我的视图位于不同的架构中，因此我不得不更改模型类的属性：

For me, my view was in a different schema, so I had to alter an attribute on the model class:

using System.ComponentModel.DataAnnotations.Schema;

namespace API.DataAccess
{
    [Table("MyViewName", Schema = "SomeSchema")]
    public class MyViewName
    {
       //props
    }
}

为完整起见，实体代码：

For completeness, the entity code:

protected override void OnModelCreating(ModelBuilder modelBuilder)
{
    modelBuilder.Entity<MyViewName>(entity =>
    {
        entity.HasKey(e => new { e.SomeColumn }).HasName("PK_FAKEKEY");
            entity.Property(e => e.SomeColumn ).IsRequired();
            entity.Property(e => e.SomeColumn2 );
            entity.Property(e => e.SomeColumn3 );
    });
}

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