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?
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.");