当我使用Npgsql.EntityFrameworkCore.PostgreSQL时，迁移不会生成属性的名称更改

Question

我是新来的。我正在使用Core项目ASP.NET Web应用程序（.NET Core）开发一个解决方案。

它生成初始平滑迁移：使用表，键和索引在 PostgreSQL 中创建的数据库。他正确地添加了种子。

我正在使用Code First选项开展项目。当您运行命令以添加迁移时，将使用Up和Down方法中的代码生成文件，但不会生成更改属性名称的语法。

我一方面尝试创建注释，另一方面尝试更改属性名称，后一种迁移运行Up和Down方法生成为空。

原班级：

using System;
using System.Collections.Generic;
using System.ComponentModel.DataAnnotations;
using System.ComponentModel.DataAnnotations.Schema;

namespace ContosoUniversity.Models
{
    public class Estudiante
    {
        public int ID { get; set; }

        public string Apellido { get; set; }

        public string PrimerNombre { get; set; }

        public DateTime FechaInscripcion { get; set; }


        public virtual ICollection<Inscripcion> Inscripciones { get; set; }
    }
}

修改后的课程：

using System;
using System.Collections.Generic;
using System.ComponentModel.DataAnnotations;
using System.ComponentModel.DataAnnotations.Schema;

namespace ContosoUniversity.Models
{
    public class Estudiante
    {
        public int ID { get; set; }

        [StringLength(50)]
        public string Apellido { get; set; }

        [StringLength(50, ErrorMessage = "First name cannot be longer than 50 characters.")]
        [Column("nombre")]
        public string PrimerNombre { get; set; }

        [DataType(DataType.Date)]
        [DisplayFormat(DataFormatString = "{0:dd/MM/yyyy}", ApplyFormatInEditMode = true)]
        public DateTime FechaInscripcion { get; set; }


        public virtual ICollection<Inscripcion> Inscripciones { get; set; }
    }
}

我运行 dotnet ef迁移添加FormatoEstudiante 和 dotnet ef update datababse 。迁移的结果是：

using Microsoft.EntityFrameworkCore.Migrations;

namespace ContosoUniversity.Migrations
{
    public partial class FormatoEstudiante : Migration
    {
        protected override void Up(MigrationBuilder migrationBuilder)
        {
            migrationBuilder.AlterColumn<string>(
                name: "primernombre",
                schema: "public",
                table: "estudiante",
                maxLength: 50,
                nullable: true);

            migrationBuilder.AlterColumn<string>(
                name: "apellido",
                schema: "public",
                table: "estudiante",
                maxLength: 50,
                nullable: true);
        }

        protected override void Down(MigrationBuilder migrationBuilder)
        {
            migrationBuilder.AlterColumn<string>(
                name: "primernombre",
                schema: "public",
                table: "estudiante",
                nullable: true);

            migrationBuilder.AlterColumn<string>(
                name: "apellido",
                schema: "public",
                table: "estudiante",
                nullable: true);
        }
    }
}

Project.json：

{
  "dependencies": {
    "Microsoft.NETCore.App": {
      "version": "1.0.0",
      "type": "platform"
    },
    "Microsoft.AspNetCore.Diagnostics": "1.0.0",
    "Microsoft.AspNetCore.Mvc": "1.0.0",
    "Microsoft.AspNetCore.Razor.Tools": {
      "version": "1.0.0-preview2-final",
      "type": "build"
    },
    "Microsoft.AspNetCore.Server.IISIntegration": "1.0.0",
    "Microsoft.AspNetCore.Server.Kestrel": "1.0.0",
    "Microsoft.AspNetCore.StaticFiles": "1.0.0",
    "Microsoft.Extensions.Configuration.EnvironmentVariables": "1.0.0",
    "Microsoft.Extensions.Configuration.Json": "1.0.0",
    "Microsoft.Extensions.Logging": "1.0.0",
    "Microsoft.Extensions.Logging.Console": "1.0.0",
    "Microsoft.Extensions.Logging.Debug": "1.0.0",
    "Microsoft.Extensions.Options.ConfigurationExtensions": "1.0.0",
    "Microsoft.VisualStudio.Web.BrowserLink.Loader": "14.0.0",
    "Microsoft.EntityFrameworkCore": "1.0.0",
    "Microsoft.EntityFrameworkCore.SqlServer": "1.0.0",
    "Microsoft.EntityFrameworkCore.Tools": "1.0.0-preview2-final",
    "Microsoft.EntityFrameworkCore.Design": "1.0.0-preview2-final",
    "Npgsql": "3.1.7",
    "Npgsql.EntityFrameworkCore.PostgreSQL": "1.0.1"},

  "tools": {
    "BundlerMinifier.Core": "2.0.238",
    "Microsoft.AspNetCore.Razor.Tools": "1.0.0-preview2-final",
    "Microsoft.AspNetCore.Server.IISIntegration.Tools": "1.0.0-preview2-    final",
    "Microsoft.EntityFrameworkCore.Tools": {
      "version": "1.0.0-preview2-final",
      "imports": [
        "portable-net45+win8+dnxcore50",
        "portable-net45+win8"
      ]
    }
  },

  "frameworks": {
    "netcoreapp1.0": {
      "imports": [
        "dotnet5.6",
        "net450",
        "portable-net45+win8"
      ]
    }
  },

  "buildOptions": {
    "emitEntryPoint": true,
    "preserveCompilationContext": true
  },

  "runtimeOptions": {
    "configProperties": {
      "System.GC.Server": true
    }
  },

  "publishOptions": {
    "include": [
      "wwwroot",
      "Views",
      "Areas/**/Views",
      "appsettings.json",
      "web.config"
    ]
  },

  "scripts": {
    "prepublish": [ "bower install", "dotnet bundle" ],
    "postpublish": [ "dotnet publish-iis --publish-folder %publish:OutputPath% --framework %publish:FullTargetFramework%" ]
  }
}

迁移无法识别列的名称更改。我不知道代码中是否存在问题，或者因为带有Npgsql的EF Core仍然不支持注释。

有什么想法吗？

谢谢...