[英]update-database fires: “There is already an object named 'Adresses' in the database”.
我無法讓自己的種子方法在已經存在的現有數據庫上運行。 該數據庫是多次遷移的結果，在該遷移中 ，我們使用ASP.NET MVC5身份數據庫（我們稱為“ IdentityDb”）遷移了自己創建的數據庫“ Whitelabel”。
這是數據庫表的概述：
由於這是代碼優先的，因此我使用包管理器控制台通過以下命令來更新數據庫：
PM> update-database -ConfigurationTypeName DAL.DataContexts.WhitelabelMigrations.Configuration
並引發錯誤“數據庫中已經存在一個名為'Adresses'的對象”。
這是WhitelabelDb上下文。
using System.Data.Entity;
using ClassLibrary.Entities;
namespace DAL.DataContexts
{
public class WhitelabelDb : DbContext
{
public WhitelabelDb()
: base("WhitelabelDb")
{
}
public virtual DbSet<Category> CategorySet { get; set; }
public virtual DbSet<Product> ProductSet { get; set; }
public virtual DbSet<Stock> StockSet { get; set; }
public virtual DbSet<Rating> RatingSet { get; set; }
public virtual DbSet<Discount> DiscountSet { get; set; }
public virtual DbSet<LineItem> LineItemSet { get; set; }
public virtual DbSet<ShoppingCart> ShoppingCartSet { get; set; }
public virtual DbSet<Invoice> InvoiceSet { get; set; }
public virtual DbSet<Customer> CustomerSet { get; set; }
public virtual DbSet<Adress> AdressSet { get; set; }
}
}
}
這是IdentityDb上下文：
using ClassLibrary.Entities;
using Microsoft.AspNet.Identity.EntityFramework;
namespace DAL.DataContexts
{
public class IdentityDb : IdentityDbContext<ApplicationUser>
{
public IdentityDb()
: base("WhitelabelDb")
{
}
}
}
這是WhitelabelMigrations的configuration.cs文件：
using System.Data.Entity.Migrations;
using System;
using System.Collections.ObjectModel;
using System.Data.Entity.Migrations;
using System.Linq;
using ClassLibrary.Entities;
namespace DAL.DataContexts.WhitelabelMigrations
{
internal sealed class Configuration : DbMigrationsConfiguration<WhitelabelDb>
{
public Configuration()
{
AutomaticMigrationsEnabled = true;
MigrationsDirectory = @"DataContexts\WhitelabelMigrations";
}
protected override void Seed(WhitelabelDb context)
{
**//This is the seed method I want to run when I update the database:**
if(!context.CategorySet.Any(c => c.Name == "Root"))
{
Category mainCategory = new Category { Id = Guid.NewGuid(), Name = "Root", Parent = null };
context.CategorySet.Add(mainCategory);
context.SaveChanges();
}
}
}
}
以及使用System.Data.Entity.Migrations的Whitelabel-Migrations的InitialCreate.cs文件；
namespace DAL.DataContexts.WhitelabelMigrations
{
public partial class InitialCreate : DbMigration
{
public override void Up()
{
CreateTable(
"dbo.Adresses",
c => new
{
Id = c.Guid(false),
Street = c.String(),
ZipCode = c.Int(false),
City = c.String(),
Country = c.String(),
IsShippingAdress = c.Boolean(false),
Customer_Id = c.Guid(),
})
.PrimaryKey(t => t.Id)
.ForeignKey("dbo.Customers", t => t.Customer_Id)
.Index(t => t.Customer_Id);
CreateTable(
"dbo.Customers",
c => new
{
Id = c.Guid(false),
FirstName = c.String(),
LastName = c.String(),
Email = c.String(),
})
.PrimaryKey(t => t.Id);
CreateTable(
"dbo.Invoices",
c => new
{
Id = c.Guid(false),
DueDate = c.DateTime(false),
InvoiceDate = c.DateTime(false),
Customer_Id = c.Guid(),
ShoppingCart_Id = c.Guid(),
})
.PrimaryKey(t => t.Id)
.ForeignKey("dbo.Customers", t => t.Customer_Id)
.ForeignKey("dbo.ShoppingCarts", t => t.ShoppingCart_Id)
.Index(t => t.Customer_Id)
.Index(t => t.ShoppingCart_Id);
CreateTable(
"dbo.ShoppingCarts",
c => new
{
Id = c.Guid(false),
Quantity = c.String(),
Status = c.String(),
IsPaid = c.Boolean(false),
})
.PrimaryKey(t => t.Id);
CreateTable(
"dbo.LineItems",
c => new
{
Id = c.Guid(false),
Quantity = c.Int(false),
ProductId = c.Guid(),
ShoppingCart_Id = c.Guid(),
})
.PrimaryKey(t => t.Id)
.ForeignKey("dbo.Products", t => t.ProductId)
.ForeignKey("dbo.ShoppingCarts", t => t.ShoppingCart_Id)
.Index(t => t.ProductId)
.Index(t => t.ShoppingCart_Id);
CreateTable(
"dbo.Products",
c => new
{
Id = c.Guid(false),
Name = c.String(),
Description = c.String(),
Price = c.Decimal(false, 18, 2),
Status = c.String(),
RekeaseDate = c.DateTime(),
Weight = c.Double(),
Category_Id = c.Guid(),
Discount_Id = c.Guid(),
Stock_Id = c.Guid(),
})
.PrimaryKey(t => t.Id)
.ForeignKey("dbo.Categories", t => t.Category_Id)
.ForeignKey("dbo.Discounts", t => t.Discount_Id)
.ForeignKey("dbo.Stocks", t => t.Stock_Id)
.Index(t => t.Category_Id)
.Index(t => t.Discount_Id)
.Index(t => t.Stock_Id);
CreateTable(
"dbo.Categories",
c => new
{
Id = c.Guid(false),
Name = c.String(),
Parent = c.Guid(),
})
.PrimaryKey(t => t.Id);
CreateTable(
"dbo.Attributes",
c => new
{
Id = c.Guid(false),
Name = c.String(),
Category_Id = c.Guid(),
})
.PrimaryKey(t => t.Id)
.ForeignKey("dbo.Categories", t => t.Category_Id)
.Index(t => t.Category_Id);
CreateTable(
"dbo.Discounts",
c => new
{
Id = c.Guid(false),
Price = c.Decimal(precision: 18, scale: 2),
StartDate = c.DateTime(),
EndDate = c.DateTime(),
})
.PrimaryKey(t => t.Id);
CreateTable(
"dbo.Ratings",
c => new
{
Id = c.Guid(false),
Rate = c.Int(),
Comment = c.String(),
Product_Id = c.Guid(),
})
.PrimaryKey(t => t.Id)
.ForeignKey("dbo.Products", t => t.Product_Id)
.Index(t => t.Product_Id);
CreateTable(
"dbo.Stocks",
c => new
{
Id = c.Guid(false),
Quantity = c.Int(),
DeliveryDate = c.DateTime(),
})
.PrimaryKey(t => t.Id);
}
public override void Down()
{
DropForeignKey("dbo.Invoices", "ShoppingCart_Id", "dbo.ShoppingCarts");
DropForeignKey("dbo.LineItems", "ShoppingCart_Id", "dbo.ShoppingCarts");
DropForeignKey("dbo.LineItems", "ProductId", "dbo.Products");
DropForeignKey("dbo.Products", "Stock_Id", "dbo.Stocks");
DropForeignKey("dbo.Ratings", "Product_Id", "dbo.Products");
DropForeignKey("dbo.Products", "Discount_Id", "dbo.Discounts");
DropForeignKey("dbo.Products", "Category_Id", "dbo.Categories");
DropForeignKey("dbo.Attributes", "Category_Id", "dbo.Categories");
DropForeignKey("dbo.Invoices", "Customer_Id", "dbo.Customers");
DropForeignKey("dbo.Adresses", "Customer_Id", "dbo.Customers");
DropIndex("dbo.Invoices", new[] {"ShoppingCart_Id"});
DropIndex("dbo.LineItems", new[] {"ShoppingCart_Id"});
DropIndex("dbo.LineItems", new[] {"ProductId"});
DropIndex("dbo.Products", new[] {"Stock_Id"});
DropIndex("dbo.Ratings", new[] {"Product_Id"});
DropIndex("dbo.Products", new[] {"Discount_Id"});
DropIndex("dbo.Products", new[] {"Category_Id"});
DropIndex("dbo.Attributes", new[] {"Category_Id"});
DropIndex("dbo.Invoices", new[] {"Customer_Id"});
DropIndex("dbo.Adresses", new[] {"Customer_Id"});
DropTable("dbo.Stocks");
DropTable("dbo.Ratings");
DropTable("dbo.Discounts");
DropTable("dbo.Attributes");
DropTable("dbo.Categories");
DropTable("dbo.Products");
DropTable("dbo.LineItems");
DropTable("dbo.ShoppingCarts");
DropTable("dbo.Invoices");
DropTable("dbo.Customers");
DropTable("dbo.Adresses");
}
}
}
當然還有Identity-Migrations InitialCreate.cs
using System.Data.Entity.Migrations;
namespace DAL.DataContexts.IdentityMigrations
{
public partial class InitialCreate : DbMigration
{
public override void Up()
{
CreateTable(
"dbo.AspNetRoles",
c => new
{
Id = c.String(false, 128),
Name = c.String(false),
})
.PrimaryKey(t => t.Id);
CreateTable(
"dbo.AspNetUsers",
c => new
{
Id = c.String(false, 128),
UserName = c.String(),
PasswordHash = c.String(),
SecurityStamp = c.String(),
Discriminator = c.String(false, 128),
Customer_Id = c.Guid(),
})
.PrimaryKey(t => t.Id)
.ForeignKey("dbo.Customers", t => t.Customer_Id)
.Index(t => t.Customer_Id);
CreateTable(
"dbo.AspNetUserClaims",
c => new
{
Id = c.Int(false, true),
ClaimType = c.String(),
ClaimValue = c.String(),
User_Id = c.String(false, 128),
})
.PrimaryKey(t => t.Id)
.ForeignKey("dbo.AspNetUsers", t => t.User_Id, true)
.Index(t => t.User_Id);
CreateTable(
"dbo.AspNetUserLogins",
c => new
{
UserId = c.String(false, 128),
LoginProvider = c.String(false, 128),
ProviderKey = c.String(false, 128),
})
.PrimaryKey(t => new {t.UserId, t.LoginProvider, t.ProviderKey})
.ForeignKey("dbo.AspNetUsers", t => t.UserId, true)
.Index(t => t.UserId);
CreateTable(
"dbo.AspNetUserRoles",
c => new
{
UserId = c.String(false, 128),
RoleId = c.String(false, 128),
})
.PrimaryKey(t => new {t.UserId, t.RoleId})
.ForeignKey("dbo.AspNetRoles", t => t.RoleId, true)
.ForeignKey("dbo.AspNetUsers", t => t.UserId, true)
.Index(t => t.RoleId)
.Index(t => t.UserId);
CreateTable(
"dbo.Customers",
c => new
{
Id = c.Guid(false),
FirstName = c.String(),
LastName = c.String(),
Email = c.String(),
})
.PrimaryKey(t => t.Id);
CreateTable(
"dbo.Adresses",
c => new
{
Id = c.Guid(false),
Street = c.String(),
ZipCode = c.Int(false),
City = c.String(),
Country = c.String(),
IsShippingAdress = c.Boolean(false),
Customer_Id = c.Guid(),
})
.PrimaryKey(t => t.Id)
.ForeignKey("dbo.Customers", t => t.Customer_Id)
.Index(t => t.Customer_Id);
CreateTable(
"dbo.Invoices",
c => new
{
Id = c.Guid(false),
DueDate = c.DateTime(false),
InvoiceDate = c.DateTime(false),
Customer_Id = c.Guid(),
ShoppingCart_Id = c.Guid(),
})
.PrimaryKey(t => t.Id)
.ForeignKey("dbo.Customers", t => t.Customer_Id)
.ForeignKey("dbo.ShoppingCarts", t => t.ShoppingCart_Id)
.Index(t => t.Customer_Id)
.Index(t => t.ShoppingCart_Id);
CreateTable(
"dbo.ShoppingCarts",
c => new
{
Id = c.Guid(false),
Quantity = c.String(),
Status = c.String(),
IsPaid = c.Boolean(false),
})
.PrimaryKey(t => t.Id);
CreateTable(
"dbo.LineItems",
c => new
{
Id = c.Guid(false),
Quantity = c.Int(false),
ProductId = c.Guid(),
ShoppingCart_Id = c.Guid(),
})
.PrimaryKey(t => t.Id)
.ForeignKey("dbo.Products", t => t.ProductId)
.ForeignKey("dbo.ShoppingCarts", t => t.ShoppingCart_Id)
.Index(t => t.ProductId)
.Index(t => t.ShoppingCart_Id);
CreateTable(
"dbo.Products",
c => new
{
Id = c.Guid(false),
Name = c.String(),
Description = c.String(),
Price = c.Decimal(false, 18, 2),
Status = c.String(),
RekeaseDate = c.DateTime(),
Weight = c.Double(),
Category_Id = c.Guid(),
Discount_Id = c.Guid(),
Stock_Id = c.Guid(),
})
.PrimaryKey(t => t.Id)
.ForeignKey("dbo.Categories", t => t.Category_Id)
.ForeignKey("dbo.Discounts", t => t.Discount_Id)
.ForeignKey("dbo.Stocks", t => t.Stock_Id)
.Index(t => t.Category_Id)
.Index(t => t.Discount_Id)
.Index(t => t.Stock_Id);
CreateTable(
"dbo.Categories",
c => new
{
Id = c.Guid(false),
Name = c.String(),
Parent = c.Guid(),
})
.PrimaryKey(t => t.Id);
CreateTable(
"dbo.Attributes",
c => new
{
Id = c.Guid(false),
Name = c.String(),
Category_Id = c.Guid(),
})
.PrimaryKey(t => t.Id)
.ForeignKey("dbo.Categories", t => t.Category_Id)
.Index(t => t.Category_Id);
CreateTable(
"dbo.Discounts",
c => new
{
Id = c.Guid(false),
Price = c.Decimal(precision: 18, scale: 2),
StartDate = c.DateTime(),
EndDate = c.DateTime(),
})
.PrimaryKey(t => t.Id);
CreateTable(
"dbo.Ratings",
c => new
{
Id = c.Guid(false),
Rate = c.Int(),
Comment = c.String(),
Product_Id = c.Guid(),
})
.PrimaryKey(t => t.Id)
.ForeignKey("dbo.Products", t => t.Product_Id)
.Index(t => t.Product_Id);
CreateTable(
"dbo.Stocks",
c => new
{
Id = c.Guid(false),
Quantity = c.Int(),
DeliveryDate = c.DateTime(),
})
.PrimaryKey(t => t.Id);
}
public override void Down()
{
DropForeignKey("dbo.AspNetUsers", "Customer_Id", "dbo.Customers");
DropForeignKey("dbo.Invoices", "ShoppingCart_Id", "dbo.ShoppingCarts");
DropForeignKey("dbo.LineItems", "ShoppingCart_Id", "dbo.ShoppingCarts");
DropForeignKey("dbo.LineItems", "ProductId", "dbo.Products");
DropForeignKey("dbo.Products", "Stock_Id", "dbo.Stocks");
DropForeignKey("dbo.Ratings", "Product_Id", "dbo.Products");
DropForeignKey("dbo.Products", "Discount_Id", "dbo.Discounts");
DropForeignKey("dbo.Products", "Category_Id", "dbo.Categories");
DropForeignKey("dbo.Attributes", "Category_Id", "dbo.Categories");
DropForeignKey("dbo.Invoices", "Customer_Id", "dbo.Customers");
DropForeignKey("dbo.Adresses", "Customer_Id", "dbo.Customers");
DropForeignKey("dbo.AspNetUserClaims", "User_Id", "dbo.AspNetUsers");
DropForeignKey("dbo.AspNetUserRoles", "UserId", "dbo.AspNetUsers");
DropForeignKey("dbo.AspNetUserRoles", "RoleId", "dbo.AspNetRoles");
DropForeignKey("dbo.AspNetUserLogins", "UserId", "dbo.AspNetUsers");
DropIndex("dbo.AspNetUsers", new[] {"Customer_Id"});
DropIndex("dbo.Invoices", new[] {"ShoppingCart_Id"});
DropIndex("dbo.LineItems", new[] {"ShoppingCart_Id"});
DropIndex("dbo.LineItems", new[] {"ProductId"});
DropIndex("dbo.Products", new[] {"Stock_Id"});
DropIndex("dbo.Ratings", new[] {"Product_Id"});
DropIndex("dbo.Products", new[] {"Discount_Id"});
DropIndex("dbo.Products", new[] {"Category_Id"});
DropIndex("dbo.Attributes", new[] {"Category_Id"});
DropIndex("dbo.Invoices", new[] {"Customer_Id"});
DropIndex("dbo.Adresses", new[] {"Customer_Id"});
DropIndex("dbo.AspNetUserClaims", new[] {"User_Id"});
DropIndex("dbo.AspNetUserRoles", new[] {"UserId"});
DropIndex("dbo.AspNetUserRoles", new[] {"RoleId"});
DropIndex("dbo.AspNetUserLogins", new[] {"UserId"});
DropTable("dbo.Stocks");
DropTable("dbo.Ratings");
DropTable("dbo.Discounts");
DropTable("dbo.Attributes");
DropTable("dbo.Categories");
DropTable("dbo.Products");
DropTable("dbo.LineItems");
DropTable("dbo.ShoppingCarts");
DropTable("dbo.Invoices");
DropTable("dbo.Adresses");
DropTable("dbo.Customers");
DropTable("dbo.AspNetUserRoles");
DropTable("dbo.AspNetUserLogins");
DropTable("dbo.AspNetUserClaims");
DropTable("dbo.AspNetUsers");
DropTable("dbo.AspNetRoles");
}
}
}
那么，由於只能從Whitelabel configuration.cs文件訪問Category類，因此如何使seed方法運行？
任何解釋，想法和建設性的幫助將不勝感激！
好吧，實際上，我要做的就是在IdentityDb中添加以下行：
public virtual DbSet<Category> CategorySet { get; set; }
我可以訪問IdentityMigrations configuration.cs中的Category類，並按照我希望的方式創建我的Seed方法。
protected override void Seed(IdentityDb context)
{
**//This is the seed method I want to run when I update the database:**
if(!context.CategorySet.Any(c => c.Name == "Root"))
{
Category mainCategory = new Category { Id = Guid.NewGuid(), Name = "Root", Parent = null };
context.CategorySet.Add(mainCategory);
context.SaveChanges();
}
}
Update-Database MVC 自動遷移 - 數據庫中已經有一個名為“StationsArrangeds”的對象
[英]Update-Database MVC automatic migrations - There is already an object named 'StationsArrangeds' in the database
實體框架要求在已附加遷移的情況下更新數據庫
[英]Entity Framework asks to update-database when migration is already appended
Update-Database 命令在 ASP.Net Core / Entity Framework Core 中不起作用，因為數據庫中的對象已經存在
[英]Update-Database command is not working in ASP.Net Core / Entity Framework Core because object in database already exists
數據庫中已經有一個名為“__MigrationHistory”的對象
[英]There is already an object named '__MigrationHistory' in the database
嘗試使用Entity Framework進行更新時，數據庫中已存在名為“AspNetRoles”的對象
[英]There is already an object named 'AspNetRoles' in the database when trying to update with Entity Framework
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