[英]Azure Cosmos DB (EF/Core) - Camel Case Property Names
I have a .NET Core 3.1 API Project which has Cosmos DB storage being handled via Entity Framework (Microsoft.EntityFrameworkCore.Cosmos - v3.1.5).我有一个 .NET Core 3.1 API 项目,它通过实体框架(Microsoft.EntityFrameworkCore.Cosmos - v3.1.5)处理 Cosmos DB 存储。
I have a database model:我有一个数据库 model:
[JsonObject(NamingStrategyType = typeof(CamelCaseNamingStrategy))]
public class BikeRental
{
[JsonProperty(PropertyName = "id")]
[Key]
public Guid Id { get; set; }
[JsonProperty(PropertyName = "bikeId")]
public string BikeId { get; set; }
[JsonProperty(PropertyName = "shopId")]
public string ShopId { get; set; }
}
Upon saving to the CosmosDB database, the columns are being serialised using the class property names, ignoring the 'PropertyName' attribute.保存到 CosmosDB 数据库后,将使用 class 属性名称对列进行序列化,忽略“PropertyName”属性。 For example, if 'bikeId' is changed to 'testBikeId' it is written as 'BikeId' still.例如,如果 'bikeId' 更改为 'testBikeId' 它仍然写为 'BikeId'。
{
"Id": "192dfdf4-54cb-4290-a478-7035518983ca",
"BikeId": "eb65b93b-17d3-4829-9729-d48c029211fe2",
"ShopId": "636c08c4-600d-458a-98b7-8d312b8c18d2",
"_rid": "2QZIAMVYbVQBAAAAAAAAAA==",
"_self": "dbs/2QZIAA==/colls/2QZIAMVYbVQ=/docs/2QZIAMVYbVQBAAAAAAAAAA==/",
"_etag": "\"00000000-0000-0000-4627-f721b0e701d6\"",
"_attachments": "attachments/",
"_ts": 1592564051
}
Any help or suggestions on how to resolve this would be much appreciated!任何有关如何解决此问题的帮助或建议将不胜感激!
Edit: The saving of the object to Cosmos is performed via:编辑:将 object 保存到 Cosmos 是通过以下方式执行的:
var response = _context.BikeRentals.Add(obj)
_context.SaveChanges();
Use Fluent API for model configuration in OnModelCreating
method:在OnModelCreating
方法中使用 Fluent API 进行 model 配置:
modelBuilder.Entity<BikeRental>().Property(x => x.Id).ToJsonProperty("id");
modelBuilder.Entity<BikeRental>().Property(x => x.BikeId).ToJsonProperty("bikeId");
modelBuilder.Entity<BikeRental>().Property(x => x.ShopId).ToJsonProperty("shopId");
For EF mapping use ColumnAttribute or the fluent configuration in OnModelCreating is used.对于 EF 映射,使用 ColumnAttribute 或使用 OnModelCreating 中的流利配置。
In the case of Cosmos you may want the names in the database to be the same as the names when you serialize for sending to the client, but in the general case your entities may map to the database differently than for JSON serialization.对于 Cosmos,您可能希望数据库中的名称与序列化以发送到客户端时的名称相同,但在一般情况下,您的实体对数据库的 map 可能与 JSON 序列化不同。
You should use the Fluent API and iterate all the entity types, and properties an apply the Pascal-to-Camel-Case transformation.您应该使用Fluent API并迭代所有实体类型和属性,然后应用 Pascal-to-Camel-Case 转换。
The problem with the id is due to not adding id的问题是由于没有添加
modelBuilder.Entity<BikeRental>().HasNoDiscriminator();
If you add this it should just create the id alone如果您添加它,它应该只创建 id
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