模型的索引不会验证

问题描述 投票:0回答:2

表格中的帖子:

CREATE TABLE "public"."filters" (
  "Id" int4 NOT NULL DEFAULT nextval('"filters_Id_seq"'::regclass),
  "Name" varchar(200) COLLATE "pg_catalog"."default" NOT NULL DEFAULT ''::character varying,
  "Type" int4 NOT NULL,
  "Alias" varchar(200) COLLATE "pg_catalog"."default" NOT NULL DEFAULT ''::character varying
)
;

-- ----------------------------
-- Indexes structure for table filters
-- ----------------------------
CREATE UNIQUE INDEX "filters_unique_alias_key" ON "public"."filters" USING btree (
  "Alias" COLLATE "pg_catalog"."default" "pg_catalog"."text_ops" ASC NULLS LAST
);
CREATE UNIQUE INDEX "filters_unique_name_key" ON "public"."filters" USING btree (
  "Name" COLLATE "pg_catalog"."default" "pg_catalog"."text_ops" ASC NULLS LAST
);

-- ----------------------------
-- Primary Key structure for table filters
-- ----------------------------
ALTER TABLE "public"."filters" ADD CONSTRAINT "filters_primary_key" PRIMARY KEY ("Id");

模型:

[Table("filters")]
    public class Filter
    {
        [Key] public int Id { get; set; }

        [Required]
        [StringLength(200)]
        public string Name { get; set; }

        [Required]
        [StringLength(200)]
        public string Alias { get; set; }

        [Required] public FilterType Type { get; set; }
    }

    public enum FilterType
    {
        Logic = 0,
        Text = 1,
        Number = 2
    }

语境:

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

            builder.Entity<Filter>().HasIndex(model => model.Name).HasName("filters_unique_name_key").IsUnique();
            builder.Entity<Filter>().HasIndex(model => model.Alias).HasName("filters_unique_alias_key").IsUnique();
        }

我正在使用NOT唯一值发出post请求,并从postgres接收DbUpdateException:

public IActionResult Create(Filter filter = null)
        {
            if (ModelState.IsValid && filter != null)
            {

                // code

            }
        }

为什么我通过流畅的api定义索引一个模型状态是有效但索引验证不起作用?似乎ef核心忽略索引验证,但为什么?如何验证?

asp.net-core entity-framework-core
2个回答
0
投票

唯一索引流畅的API配置不会影响模型验证。在不查询数据库的情况下,它无法知道特定的发布值是否是唯一的,这不是模型绑定器有权做甚至应该做的事情。如果要为此添加验证,则需要手动执行此操作。

var filter = await _context.Filters.FirstOrDefaultAsync(x => x.Name == model.Name || x.Alias == model.Alias);
if (filter?.Name == model.Name)
    ModelState.AddModelError(nameof(model.Name), "Name must be unique.");
if (filter?.Alias == model.Alias)
    ModelState.AddModelError(nameof(model.Alias), "Alias must be unique.");
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