在运行命令dotnet ef migrations添加InitialCreate使它工作后，是否可以编辑迁移？

问题描述

在使用Entity Framework Core 3.1.7为MysqL创建了这样的模型之后，我收到一个尝试运行迁移的错误； dotnet ef数据库更新。原因是所有索引都在迁移结束时添加。我是否应该经历一下并在CREATE TABLE之后手动放置索引，还是一个bug？试图整合我所有的迁移。

创建表Children（ CommonId int NOT NULL， ParentId int NOT NULL， ChildId int NOT NULL， Group_Roles int NULL， 约束PK_Children主键（CommonId，ParentId，ChildId）， 删除级联时约束FK_Children_Parents_CommonId_ParentId外键（CommonId，ParentId）参考Parents（CommonId，ParentId） ）; MysqL.Data.MysqLClient.MysqLException（0x80004005）：无法添加外键约束。参照表“父母”中缺少约束的索引“ FK_Children_Parents_CommonId_ParentId” ---> MysqL.Data.MysqLClient.MysqLException（0x80004005）：添加外键约束失败。引用表“父母”中约束“ FK_Children_Parents_CommonId_ParentId”的缺少索引

    public class Parent
    {
        public int CommonId { get; set; }

        public int ParentId { get; set; }

        public string Name { get; set; }

        public virtual ICollection<Child> Children { get; } = new HashSet<Child>();
    }

    public class Child
    {
        public int CommonId { get; set; }

        public int ParentId { get; set; }

        public int ChildId { get; set; }

        public virtual Parent Parent { get; set; }
    }

    public class TestContext : DbContext
    {
        protected override void OnConfiguring(DbContextOptionsBuilder optionsBuilder)
        {
            optionsBuilder.UseMysqL("");
        }

        public DbSet<Parent> Parents { get; set; }

        public DbSet<Child> Children { get; set; }

        protected override void OnModelCreating(ModelBuilder modelBuilder)
        {
            base.OnModelCreating(modelBuilder);

            modelBuilder.Entity<Parent>(entity =>
            {
                entity.HasKey(e => new { e.CommonId,e.ParentId });

                entity.Property(e => e.ParentId)
                    .ValueGeneratedOnAdd();
            });

            modelBuilder.Entity<Parent>().HasIndex(e => new { e.CommonId,e.ParentId }).IsUnique();

            modelBuilder.Entity<Child>(entity =>
            {
                entity.HasKey(e => new { e.CommonId,e.ParentId,e.ChildId });

                entity.HasOne(e => e.Parent)
                    .WithMany(e => e.Children)
                    .HasForeignKey(p => new { p.CommonId,p.ParentId });
            });
        }
    }

是要手动在两个表之间移动modelBuilder.CreateIndex吗？

        protected override void Up(MigrationBuilder migrationBuilder)
    {
        migrationBuilder.CreateTable(
            name: "Parents",columns: table => new
            {
                CommonId = table.Column<int>(nullable: false),ParentId = table.Column<int>(nullable: false)
                    .Annotation("MysqL:ValueGenerationStrategy",MysqLValueGenerationStrategy.IdentityColumn),Name = table.Column<string>(nullable: true)
            },constraints: table =>
            {
                table.PrimaryKey("PK_Parents",x => new { x.CommonId,x.ParentId });
            });

        migrationBuilder.CreateTable(
            name: "Children",ParentId = table.Column<int>(nullable: false),ChildId = table.Column<int>(nullable: false),Group_Roles = table.Column<int>(nullable: true)
            },constraints: table =>
            {
                table.PrimaryKey("PK_Children",x.ParentId,x.ChildId });
                table.ForeignKey(
                    name: "FK_Children_Parents_CommonId_ParentId",columns: x => new { x.CommonId,x.ParentId },principalTable: "Parents",principalColumns: new[] { "CommonId","ParentId" },onDelete: referentialAction.Cascade);
            });

        migrationBuilder.CreateIndex(
            name: "IX_Parents_CommonId_ParentId",table: "Parents",columns: new[] { "CommonId",unique: true);
    }

解决方法

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