add some APIs

Server/Data/Model/FlowerItem.cs

@@ -24,7 +24,7 @@ public class FlowerItem : ILocation
     [Column("uid")]
     [ForeignKey(nameof(Owner))]
     [Required]
-    public int OwnerId { get; set; }
+    public required int OwnerId { get; set; }
 
     /// <summary>
     /// 所有人
@@ -37,7 +37,7 @@ public class FlowerItem : ILocation
     /// </summary>
     [Column("categoryid")]
     [Required]
-    public int CategoryId { get; set; }
+    public required int CategoryId { get; set; }
 
     /// <summary>
     /// 花草名称
@@ -52,7 +52,7 @@ public class FlowerItem : ILocation
     [Column("datebuy")]
     [Required]
     [JsonPropertyName("dateBuy")]
-    public long DateBuyUnixTime { get; set; }
+    public required long DateBuyUnixTime { get; set; }
 
     /// <summary>
     /// 购买花费