在字段 Entity Framework Core 中设置默认值

Question

I need to set this by Fluent API and I`ve read documentation. There is HasDefaultValue() method should I use. But I can not write it, VS does not give me to do it

the code below from here documentation

  protected override void OnModelCreating(ModelBuilder modelBuilder)
{
    modelBuilder.Entity<Blog>()
        .Property(b => b.Rating)
        .HasDefaultValue(3);
}

Answer 1

Check whether you have installed nuget package Microsoft.EntityframeworkCore.SqlServer . It has a dependency of Microsoft.EntityframeworkCore.Relational whixh has the HasDefaultValue() extension