OData抱怨启用camelcasing时缺少id属性。

Question

我想让骆驼套我的数据结果。所以我加入了EnableLowerCamelCase。但是，在启用之后，当我调用时会得到以下错误消息：

http://localhost/odata/Users

类型'Core.DomainModel.User Nullable=True‘的EDM实例缺少属性'id’。

在我EnableLowerCamelCase之前，一切都正常工作，如果我删除它，它会再次工作。此外，错误信息也相当混乱。它说用户丢失了'id‘属性。这不可能是真的。因为我把“Id”定义为钥匙。

var builder = new ODataConventionModelBuilder();
builder.EnableLowerCamelCase();

var users = builder.EntitySet<User>(nameof(UsersController).Replace("Controller", string.Empty));
users.EntityType.HasKey(x => x.Id); // <--- id property

builder.GetEdmModel();

我做错了什么？

Answer 1

我解决这个问题的方法是从EDM模型中删除实体键声明，并在模型本身中指定它，这样我的edm看起来就像‘

var builder = new ODataConventionModelBuilder(serviceProvider);
builder.EnableLowerCamelCase();
var subscriptionSet = builder.EntitySet<SubscriptionDTO>("Subscriptions");
  subscriptionSet.EntityType
            .Filter() // Allow for the $filter Command
            .Count() // Allow for the $count Command
            .Expand() // Allow for the $expand Command
            .OrderBy() // Allow for the $orderby Command
            .Page() // Allow for the $top and $skip Commands
            .Select(); // Allow for the $select Command

  // subscriptionSet.EntityType.HasKey(s => s.Id);
  //subscriptionSet.EntityType.EntityType.Property(s => s.Id).IsOptional();`

在模型中，使用DataAnnotations标识密钥：

public class BaseModel
  {
    [Key]
    public Guid? Id {get; set;}
    public Guid? TenantId {get; set;}
    public string Type {get; set;}
    public bool Active {get; set;} = true;

    public BaseModel() {
        this.Id = System.Guid.NewGuid();
    }

然后按照惯例将DTO与Automapper一起使用：

[JsonObject(NamingStrategyType = typeof(CamelCaseNamingStrategy))]

    public class BaseDTO
    {
        public Guid? Id {get; set;}
        public Guid? TenantId {get; set;}
        public string Type {get; set;}
        public bool Active {get; set;} = true;

        public BaseDTO() {
            this.Id = System.Guid.NewGuid();
        }

    }

 [JsonObject(NamingStrategyType = typeof(CamelCaseNamingStrategy))]
    public class SubscriptionDTO: BaseDTO
    {
        [JsonProperty("email")]
        public string Email {get; set;}

        public SubscriptionDTO(): base() {
           this.Type = "subscription";
        }
    }