EF 6 IsRequired()允许空字符串 [英] EF 6 IsRequired() allowing empty strings

问题描述

在以前的版本为EF5和EF4的项目中，如果属性为null或空字符串，则IsRequired()流利的API方法将引发DbEntityValidationException.在我当前使用EF6的项目中，当string属性为空时，不会引发DBEntityValidationException.

In past projects with versions of EF5 and EF4, the IsRequired() fluent API method would thrown a DbEntityValidationException if the property was null or an empty string. In my current project utilizng EF6, The DBEntityValidationException is not thrown when the string property is empty.

实体:

public class Application : BaseEntity
{
    public string Name { get; set; }

    // navigation properties
    public IList<Role> Roles { get; set; }
}

配置:

internal class ApplicationMapping : EntityTypeConfiguration<Application>
{
    public ApplicationMapping()
    {
        // table name
        this.ToTable("Applications");

        // properties
        this.Property(t => t.Name)
            .IsRequired()
            .HasMaxLength(100);
    }
}

倾倒了MSDN EF文档和堆栈溢出后，我不知为什么会发生这种情况.是否对EF6添加或修改了约定?

After pouring over the MSDN EF documentation and stack overflow, I am at a loss for why this is happening. Did a convention get added/modified to EF6?

推荐答案

这几天，您仍然可以使用[Required]属性并具有可配置的AllowEmptyStrings

These days you can still use [Required] attribute and have configurable AllowEmptyStrings

[Required(AllowEmptyStrings = false)]

默认为假

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