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

问题描述

在过去使用 EF5 和 EF4 版本的项目中，如果属性为 null 或空字符串，IsRequired() fluent API 方法将引发 DbEntityValidationException.在我当前使用 EF6 的项目中，当字符串属性为空时，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);
    }
}

在翻阅 MSDN EF 文档和堆栈溢出之后，我不知道为什么会发生这种情况.是否向 EF6 添加/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

这些天你仍然可以使用 [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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