当我进行添加迁移和更新数据库问题之后

Question

我必须在项目中添加新模型 这是模型

 public class Marking
    {
        [Key]
        public int IdMakring{get;set;}
        public int IdMema { get; set; }
        [ForeignKey("Author")]
        public string Authorr {get;set;}

    }

在我添加的模型memyContext中

public DbSet<Marking> Marking { get; set; }

我做了添加迁移和更新数据库

add-migration initialll -Context  MemeGenerator.Data.ApplicationDbContext
add-migration initialll -Context  memyContext
update-database -Context  MemeGenerator.Data.ApplicationDbContext

当我这样做时，显示错误：

我尝试了更多的更新数据库，但这没有帮助。有人看到我该如何解决？

Answer 1

尝试执行指定迁移名称

示例：

<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<link rel="stylesheet" href="https://stackpath.bootstrapcdn.com/bootstrap/4.3.1/css/bootstrap.min.css" integrity="sha384-ggOyR0iXCbMQv3Xipma34MD+dH/1fQ784/j6cY/iJTQUOhcWr7x9JvoRxT2MZw1T" crossorigin="anonymous">
<div class="btn-group" role="group" aria-label="Basic example">
  <button type="button" class="btn btn-secondary">Left</button>
  <button type="button" class="btn btn-secondary" id="input-box">
  <div class="input-group m-0">
  <input type="text" class="form-control" placeholder="Recipient's username" aria-label="Recipient's username" aria-describedby="basic-addon2">
  <div class="input-group-append">
    <span class="input-group-text" id="basic-addon2">Zip Zode</span>
  </div>
</div>
  
  </button>
  <button type="button" class="btn btn-secondary">Right</button>
</div>