c# - Entity Framework Core 没有在我的数据库中创建表
问题描述
我试过删除和创建一个新的数据库，删除和创建新的迁移，但什么也做不了。
首先，我创建了一个新数据库，然后将连接字符串放在 appsettings 中，并尝试运行“update-database”。我得到的只是这个：
Executed DbCommand (178ms) [Parameters=[], CommandType='Text', CommandTimeout='30']
SELECT OBJECT_ID(N'__EFMigrationsHistory');
Executed DbCommand (4ms) [Parameters=[], CommandType='Text', CommandTimeout='30']
SELECT OBJECT_ID(N'__EFMigrationsHistory');
Executed DbCommand (8ms) [Parameters=[], CommandType='Text', CommandTimeout='30']
SELECT [MigrationId], [ProductVersion]
FROM [__EFMigrationsHistory]
ORDER BY [MigrationId];
Done.
并没有创造任何东西。所以，我删除了所有内容并从头开始，然后我得到了这个：
Executed DbCommand (141ms) [Parameters=[], CommandType='Text', CommandTimeout='30']
SELECT OBJECT_ID(N'__EFMigrationsHistory');
Executed DbCommand (3ms) [Parameters=[], CommandType='Text', CommandTimeout='30']
SELECT OBJECT_ID(N'__EFMigrationsHistory');
Executed DbCommand (20ms) [Parameters=[], CommandType='Text', CommandTimeout='30']
SELECT [MigrationId], [ProductVersion]
FROM [__EFMigrationsHistory]
ORDER BY [MigrationId];
Applying migration '20181220145036_test'.
Executed DbCommand (49ms) [Parameters=[], CommandType='Text', CommandTimeout='30']
CREATE TABLE [CartItems] (
[ID] int NOT NULL IDENTITY,
[cartID] nvarchar(max),
[itempicture] nvarchar(max),
[name] nvarchar(max),
[price] int NOT NULL,
[productID] int NOT NULL,
CONSTRAINT [PK_CartItems] PRIMARY KEY ([ID])
);
System.Data.SqlClient.SqlException: There is already an object named 'CartItems' in the database.
at System.Data.SqlClient.SqlConnection.OnError(SqlException exception, Boolean breakConnection, Action`1 wrapCloseInAction)
at System.Data.SqlClient.TdsParser.ThrowExceptionAndWarning(TdsParserStateObject stateObj, Boolean callerHasConnectionLock, Boolean asyncClose)
at System.Data.SqlClient.TdsParser.TryRun(RunBehavior runBehavior, SqlCommand cmdHandler, SqlDataReader dataStream, BulkCopySimpleResultSet bulkCopyHandler, TdsParserStateObject stateObj, Boolean& dataReady)
at System.Data.SqlClient.SqlCommand.RunExecuteNonQueryTds(String methodName, Boolean async, Int32 timeout, Boolean asyncWrite)
at System.Data.SqlClient.SqlCommand.InternalExecuteNonQuery(TaskCompletionSource`1 completion, Boolean sendToPipe, Int32 timeout, Boolean asyncWrite, String methodName)
at System.Data.SqlClient.SqlCommand.ExecuteNonQuery()
at Microsoft.EntityFrameworkCore.Storage.Internal.RelationalCommand.Execute(IRelationalConnection connection, String executeMethod, IReadOnlyDictionary`2 parameterValues, Boolean closeConnection)
at Microsoft.EntityFrameworkCore.Storage.Internal.RelationalCommand.ExecuteNonQuery(IRelationalConnection connection, IReadOnlyDictionary`2 parameterValues)
at Microsoft.EntityFrameworkCore.Migrations.Internal.MigrationCommandExecutor.ExecuteNonQuery(IEnumerable`1 migrationCommands, IRelationalConnection connection)
at Microsoft.EntityFrameworkCore.Migrations.Internal.Migrator.Migrate(String targetMigration)
at Microsoft.EntityFrameworkCore.Design.Internal.MigrationsOperations.UpdateDatabase(String targetMigration, String contextType)
at Microsoft.EntityFrameworkCore.Design.OperationExecutor.UpdateDatabase.<>c__DisplayClass0_1.<.ctor>b__0()
at Microsoft.EntityFrameworkCore.Design.OperationExecutor.OperationBase.Execute(Action action)
ClientConnectionId:2170e7ba-871f-416a-88c9-bfb2bf586d3d
Error Number:2714,State:6,Class:16
There is already an object named 'CartItems' in the database.
我知道这是错误的，因为它是一个全新的空数据库。我的一些代码：
应用程序上下文：
public class ApplicationDbContextFactory : IDbContextFactory<ApplicationDbContext>
{
public ApplicationDbContext Create(DbContextFactoryOptions options)
{
var optionsBuilder = new DbContextOptionsBuilder<ApplicationDbContext>();
return new ApplicationDbContext(optionsBuilder.Options);
}
}
public class ApplicationDbContext : IdentityDbContext<ApplicationUser>
{
public ApplicationDbContext(DbContextOptions<ApplicationDbContext> options) : base(options)
{
}
protected override void OnConfiguring(DbContextOptionsBuilder optionsBuilder)
{
if (!optionsBuilder.IsConfigured)
{
IConfigurationRoot configuration = new ConfigurationBuilder()
.SetBasePath(Directory.GetCurrentDirectory())
.AddJsonFile("appsettings.json")
.Build();
var connectionString = configuration.GetConnectionString("DefaultConnection");
optionsBuilder.UseSqlServer(connectionString);
}
}
//protected override void OnModelCreating(ModelBuilder builder)
//{
// base.OnModelCreating(builder);
// // Customize the ASP.NET Identity model and override the defaults if needed.
// // For example, you can rename the ASP.NET Identity table names and more.
// // Add your customizations after calling base.OnModelCreating(builder);
//}
public DbSet<Product> Products { get; set; }
public DbSet<Order> Orders { get; set; }
public DbSet<CartItems> CartItems { get; set; }
public DbSet<OrderDetails> OrderDetails { get; set; }
}
购物车物品：
public class CartItems
{
public int ID { get; set; }
public string cartID { get; set; }
public string name { get; set; }
public int price { get; set; }
public string itempicture { get; set; }
public int productID { get; set; }
}
过去，我已经能够使用相同的代码和应用程序创建表。我也在其他项目中以相同的方式使用 EFCore，目前没有任何问题。所以，我真的很感激能帮助它重新工作。我想知道将来该怎么做。
编辑：连接字符串：
"DefaultConnection": "Data Source=CHRISTOPHER09E8;Initial Catalog=LNCTest;Integrated Security=True"
EDIT2：迁移：
namespace LNCLibrary.Migrations
{
public partial class Initialv1 : Migration
{
protected override void Up(MigrationBuilder migrationBuilder)
{
migrationBuilder.CreateTable(
name: "CartItems",
columns: table => new
{
ID = table.Column<int>(nullable: false)
.Annotation("SqlServer:ValueGenerationStrategy", SqlServerValueGenerationStrategy.IdentityColumn),
cartID = table.Column<string>(nullable: true),
itempicture = table.Column<string>(nullable: true),
name = table.Column<string>(nullable: true),
price = table.Column<int>(nullable: false),
productID = table.Column<int>(nullable: false)
},
constraints: table =>
{
table.PrimaryKey("PK_CartItems", x => x.ID);
});
migrationBuilder.CreateTable(
name: "Products",
columns: table => new
{
ID = table.Column<int>(nullable: false)
.Annotation("SqlServer:ValueGenerationStrategy", SqlServerValueGenerationStrategy.IdentityColumn),
Category = table.Column<int>(nullable: false),
DateCreated = table.Column<DateTime>(nullable: false),
GenderOption = table.Column<int>(nullable: false),
Price = table.Column<int>(nullable: false),
ProductDescription = table.Column<string>(nullable: true),
ProductName = table.Column<string>(nullable: true),
ProfilePicture = table.Column<string>(nullable: true),
Quantity = table.Column<int>(nullable: false)
},
constraints: table =>
{
table.PrimaryKey("PK_Products", x => x.ID);
});
migrationBuilder.CreateTable(
name: "AspNetUsers",
columns: table => new
{
Id = table.Column<string>(nullable: false),
AccessFailedCount = table.Column<int>(nullable: false),
Address = table.Column<string>(nullable: true),
CheckoutComments = table.Column<string>(nullable: true),
City = table.Column<string>(nullable: true),
ConcurrencyStamp = table.Column<string>(nullable: true),
Email = table.Column<string>(maxLength: 256, nullable: true),
EmailConfirmed = table.Column<bool>(nullable: false),
FirstName = table.Column<string>(nullable: true),
LastName = table.Column<string>(nullable: true),
LockoutEnabled = table.Column<bool>(nullable: false),
LockoutEnd = table.Column<DateTimeOffset>(nullable: true),
NormalizedEmail = table.Column<string>(maxLength: 256, nullable: true),
NormalizedUserName = table.Column<string>(maxLength: 256, nullable: true),
PasswordHash = table.Column<string>(nullable: true),
PhoneNumber = table.Column<string>(nullable: true),
PhoneNumberConfirmed = table.Column<bool>(nullable: false),
SecurityStamp = table.Column<string>(nullable: true),
State = table.Column<int>(nullable: false),
TwoFactorEnabled = table.Column<bool>(nullable: false),
UserName = table.Column<string>(maxLength: 256, nullable: true),
ZipCode = table.Column<int>(nullable: false)
},
constraints: table =>
{
table.PrimaryKey("PK_AspNetUsers", x => x.Id);
});
migrationBuilder.CreateTable(
name: "AspNetRoles",
columns: table => new
{
Id = table.Column<string>(nullable: false),
ConcurrencyStamp = table.Column<string>(nullable: true),
Name = table.Column<string>(maxLength: 256, nullable: true),
NormalizedName = table.Column<string>(maxLength: 256, nullable: true)
},
constraints: table =>
{
table.PrimaryKey("PK_AspNetRoles", x => x.Id);
});
migrationBuilder.CreateTable(
name: "AspNetUserTokens",
columns: table => new
{
UserId = table.Column<string>(nullable: false),
LoginProvider = table.Column<string>(nullable: false),
Name = table.Column<string>(nullable: false),
Value = table.Column<string>(nullable: true)
},
constraints: table =>
{
table.PrimaryKey("PK_AspNetUserTokens", x => new { x.UserId, x.LoginProvider, x.Name });
});
migrationBuilder.CreateTable(
name: "Size",
columns: table => new
{
ID = table.Column<int>(nullable: false)
.Annotation("SqlServer:ValueGenerationStrategy", SqlServerValueGenerationStrategy.IdentityColumn),
ProductID = table.Column<int>(nullable: true),
ThisSize = table.Column<int>(nullable: false)
},
constraints: table =>
{
table.PrimaryKey("PK_Size", x => x.ID);
table.ForeignKey(
name: "FK_Size_Products_ProductID",
column: x => x.ProductID,
principalTable: "Products",
principalColumn: "ID",
onDelete: ReferentialAction.Restrict);
});
migrationBuilder.CreateTable(
name: "Orders",
columns: table => new
{
ID = table.Column<int>(nullable: false)
.Annotation("SqlServer:ValueGenerationStrategy", SqlServerValueGenerationStrategy.IdentityColumn),
Address = table.Column<string>(nullable: true),
CartID = table.Column<string>(nullable: true),
CheckoutComments = table.Column<string>(nullable: true),
City = table.Column<string>(nullable: true),
ConfirmationNumber = table.Column<string>(nullable: true),
DateOfPurchase = table.Column<DateTime>(nullable: false),
Email = table.Column<string>(nullable: true),
FinalPrice = table.Column<float>(nullable: false),
FirstName = table.Column<string>(nullable: true),
LastName = table.Column<string>(nullable: true),
PaymentMethod = table.Column<int>(nullable: false),
RegularCustomerId = table.Column<string>(nullable: true),
State = table.Column<int>(nullable: false),
Status = table.Column<int>(nullable: false),
ZipCode = table.Column<int>(nullable: false),
isGuest = table.Column<bool>(nullable: false)
},
constraints: table =>
{
table.PrimaryKey("PK_Orders", x => x.ID);
table.ForeignKey(
name: "FK_Orders_AspNetUsers_RegularCustomerId",
column: x => x.RegularCustomerId,
principalTable: "AspNetUsers",
principalColumn: "Id",
onDelete: ReferentialAction.Restrict);
});
migrationBuilder.CreateTable(
name: "AspNetUserClaims",
columns: table => new
{
Id = table.Column<int>(nullable: false)
.Annotation("SqlServer:ValueGenerationStrategy", SqlServerValueGenerationStrategy.IdentityColumn),
ClaimType = table.Column<string>(nullable: true),
ClaimValue = table.Column<string>(nullable: true),
UserId = table.Column<string>(nullable: false)
},
constraints: table =>
{
table.PrimaryKey("PK_AspNetUserClaims", x => x.Id);
table.ForeignKey(
name: "FK_AspNetUserClaims_AspNetUsers_UserId",
column: x => x.UserId,
principalTable: "AspNetUsers",
principalColumn: "Id",
onDelete: ReferentialAction.Cascade);
});
migrationBuilder.CreateTable(
name: "AspNetUserLogins",
columns: table => new
{
LoginProvider = table.Column<string>(nullable: false),
ProviderKey = table.Column<string>(nullable: false),
ProviderDisplayName = table.Column<string>(nullable: true),
UserId = table.Column<string>(nullable: false)
},
constraints: table =>
{
table.PrimaryKey("PK_AspNetUserLogins", x => new { x.LoginProvider, x.ProviderKey });
table.ForeignKey(
name: "FK_AspNetUserLogins_AspNetUsers_UserId",
column: x => x.UserId,
principalTable: "AspNetUsers",
principalColumn: "Id",
onDelete: ReferentialAction.Cascade);
});
migrationBuilder.CreateTable(
name: "AspNetRoleClaims",
columns: table => new
{
Id = table.Column<int>(nullable: false)
.Annotation("SqlServer:ValueGenerationStrategy", SqlServerValueGenerationStrategy.IdentityColumn),
ClaimType = table.Column<string>(nullable: true),
ClaimValue = table.Column<string>(nullable: true),
RoleId = table.Column<string>(nullable: false)
},
constraints: table =>
{
table.PrimaryKey("PK_AspNetRoleClaims", x => x.Id);
table.ForeignKey(
name: "FK_AspNetRoleClaims_AspNetRoles_RoleId",
column: x => x.RoleId,
principalTable: "AspNetRoles",
principalColumn: "Id",
onDelete: ReferentialAction.Cascade);
});
migrationBuilder.CreateTable(
name: "AspNetUserRoles",
columns: table => new
{
UserId = table.Column<string>(nullable: false),
RoleId = table.Column<string>(nullable: false)
},
constraints: table =>
{
table.PrimaryKey("PK_AspNetUserRoles", x => new { x.UserId, x.RoleId });
table.ForeignKey(
name: "FK_AspNetUserRoles_AspNetRoles_RoleId",
column: x => x.RoleId,
principalTable: "AspNetRoles",
principalColumn: "Id",
onDelete: ReferentialAction.Cascade);
table.ForeignKey(
name: "FK_AspNetUserRoles_AspNetUsers_UserId",
column: x => x.UserId,
principalTable: "AspNetUsers",
principalColumn: "Id",
onDelete: ReferentialAction.Cascade);
});
migrationBuilder.CreateTable(
name: "OrderDetails",
columns: table => new
{
ID = table.Column<int>(nullable: false)
.Annotation("SqlServer:ValueGenerationStrategy", SqlServerValueGenerationStrategy.IdentityColumn),
CartID = table.Column<string>(nullable: true),
Name = table.Column<string>(nullable: true),
OrderID = table.Column<int>(nullable: false),
price = table.Column<int>(nullable: false),
productpicture = table.Column<string>(nullable: true)
},
constraints: table =>
{
table.PrimaryKey("PK_OrderDetails", x => x.ID);
table.ForeignKey(
name: "FK_OrderDetails_Orders_OrderID",
column: x => x.OrderID,
principalTable: "Orders",
principalColumn: "ID",
onDelete: ReferentialAction.Cascade);
});
migrationBuilder.CreateIndex(
name: "IX_Orders_RegularCustomerId",
table: "Orders",
column: "RegularCustomerId");
migrationBuilder.CreateIndex(
name: "IX_OrderDetails_OrderID",
table: "OrderDetails",
column: "OrderID");
migrationBuilder.CreateIndex(
name: "IX_Size_ProductID",
table: "Size",
column: "ProductID");
migrationBuilder.CreateIndex(
name: "EmailIndex",
table: "AspNetUsers",
column: "NormalizedEmail");
migrationBuilder.CreateIndex(
name: "UserNameIndex",
table: "AspNetUsers",
column: "NormalizedUserName",
unique: true);
migrationBuilder.CreateIndex(
name: "RoleNameIndex",
table: "AspNetRoles",
column: "NormalizedName",
unique: true);
migrationBuilder.CreateIndex(
name: "IX_AspNetRoleClaims_RoleId",
table: "AspNetRoleClaims",
column: "RoleId");
migrationBuilder.CreateIndex(
name: "IX_AspNetUserClaims_UserId",
table: "AspNetUserClaims",
column: "UserId");
migrationBuilder.CreateIndex(
name: "IX_AspNetUserLogins_UserId",
table: "AspNetUserLogins",
column: "UserId");
migrationBuilder.CreateIndex(
name: "IX_AspNetUserRoles_RoleId",
table: "AspNetUserRoles",
column: "RoleId");
}
protected override void Down(MigrationBuilder migrationBuilder)
{
migrationBuilder.DropTable(
name: "CartItems");
migrationBuilder.DropTable(
name: "OrderDetails");
migrationBuilder.DropTable(
name: "Size");
migrationBuilder.DropTable(
name: "AspNetRoleClaims");
migrationBuilder.DropTable(
name: "AspNetUserClaims");
migrationBuilder.DropTable(
name: "AspNetUserLogins");
migrationBuilder.DropTable(
name: "AspNetUserRoles");
migrationBuilder.DropTable(
name: "AspNetUserTokens");
migrationBuilder.DropTable(
name: "Orders");
migrationBuilder.DropTable(
name: "Products");
migrationBuilder.DropTable(
name: "AspNetRoles");
migrationBuilder.DropTable(
name: "AspNetUsers");
}
}
}
解决方案
终于弄明白了，感谢Reddit上的 u/The_MAZZTer 。因此，由于某种原因，我的OnConfiguration方法中的配置生成器在ApplicationDbContext我的appsettings.json. 那里出了点问题。我将连接字符串硬编码到方法中，并将迁移推送到我的数据库，没有任何问题。所以现在我需要弄清楚是否有办法使用这种方法，或者找出为什么它没有拉正确的绳子。尽管如此，我现在有办法迁移，这对我来说很重要。感谢其他所有人的帮助。
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