更新数据库后未创建数据库

Question

我正在使用.NET Framework 4.6编写一个CMS项目，但一开始就遇到了问题。该项目有 3 层，数据层、领域层和 MVC 层是分开的。我用 Fluent 创建了表格。 一切似乎都很好并且运行没有错误，但是项目数据库没有创建。我还将提供该项目完整源代码的链接。如果有人知道这个问题，请告诉我。 github

总共需要创建三张表，项目的dbcontext和connectionstring如下：

public class CMSContext : DbContext
{
    #region Constructor
    public CMSContext() : base("CMS_DB") { }
    #endregion

    #region Tables
    public DbSet<PageGroup> PageGroups { get; set; }
    public DbSet<Page> Pages { get; set; }
    public DbSet<PageComment> PageComments { get; set; }
    #endregion

    #region Fluent
    protected override void OnModelCreating(DbModelBuilder modelBuilder)
    {
        modelBuilder.Configurations.Add(new PageMap());
        modelBuilder.Configurations.Add(new PageGroupMap());
        modelBuilder.Configurations.Add(new PageCommentMap());
    }
    #endregion
}

    <connectionStrings>
        <add name="CMS_DB" connectionString="Data Source=.;Initial Catalog=CMSProject_DB;Integrated Security=True" providerName="System.Data.SqlClient" />
    </connectionStrings>

迁移代码：

public override void Up()
{
    CreateTable(
        "Portal.Comments",
        c => new
            {
                CommentId = c.Int(nullable: false, identity: true),
                PageId = c.Int(nullable: false),
                Name = c.String(nullable: false, maxLength: 150),
                Email = c.String(maxLength: 200),
                WebSite = c.String(maxLength: 200),
                Comment = c.String(maxLength: 500),
                CreateDate = c.DateTime(nullable: false),
            })
        .PrimaryKey(t => t.CommentId)
        .ForeignKey("Portal.Pages", t => t.PageId, cascadeDelete: true)
        .Index(t => t.PageId);
    
    CreateTable(
        "Portal.Pages",
        c => new
            {
                PageId = c.Int(nullable: false, identity: true),
                GroupId = c.Int(nullable: false),
                Title = c.String(nullable: false, maxLength: 350),
                ShortDescription = c.String(nullable: false, maxLength: 250),
                Text = c.String(nullable: false),
                Visit = c.Int(nullable: false),
                ImageName = c.String(),
                ShowInSlider = c.Boolean(nullable: false),
                CreateDate = c.DateTime(nullable: false),
            })
        .PrimaryKey(t => t.PageId)
        .ForeignKey("Portal.Groups", t => t.GroupId, cascadeDelete: true)
        .Index(t => t.GroupId);
    
    CreateTable(
        "Portal.Groups",
        c => new
            {
                GroupId = c.Int(nullable: false, identity: true),
                GroupTitle = c.String(nullable: false, maxLength: 150),
            })
        .PrimaryKey(t => t.GroupId);
    
}

public override void Down()
{
    DropForeignKey("Portal.Comments", "PageId", "Portal.Pages");
    DropForeignKey("Portal.Pages", "GroupId", "Portal.Groups");
    DropIndex("Portal.Pages", new[] { "GroupId" });
    DropIndex("Portal.Comments", new[] { "PageId" });
    DropTable("Portal.Groups");
    DropTable("Portal.Pages");
    DropTable("Portal.Comments");
}

Answer 1

尝试在重写中调用基本方法。

protected override void OnModelCreating(ModelBuilder builder)
{          
    base.OnModelCreating(builder);
}