CODEWITHSUNDEEP
c#entity-framework-coreazure-cosmosdbazure-cosmosdb-sqlapief-core-3.1
Mojtaba Khooryani
Mojtaba Khooryani

Reputation: 1875

Ef Core HasConversion not working using CosmosDb provider

I'm using Ef Core with CosmosDb provider and I want to use strongly typed Id for my Entities but my code does not work correctly. detail:

Domain:

public class Customer : Entity
{
    public CustomerId Id { get; set; }
    public string PartitionKey { get; set; }
    public string FirstName { get; set; }
    public string DocumentType { get; set; }
}

public class CustomerId : TypedId<string>
{
    public CustomerId(string value) : base(value)
    {
    }
}
public class TypedId<TKey>
{
    public TKey Value { get; }
    protected TypedId(TKey value)
    {
        Value = value;
    }
}

Config:

class CustomerConfiguration : IEntityTypeConfiguration<Customer>
{
    public void Configure(EntityTypeBuilder<Customer> builder)
    {
        builder.HasPartitionKey(x => x.PartitionKey);

        builder.Property(x => x.Id).ToJsonProperty("id");

        builder.Property(x => x.Id).HasConversion(x => x.Value, x => new CustomerId((x)));
        builder.HasKey(x => x.Id);
        builder.Property(x => x.PartitionKey).ToJsonProperty("partitionKey");
        builder.Property(x => x.FirstName).ToJsonProperty("firstName");

        builder.Property(x => x.DocumentType).ToJsonProperty("documentType");
        builder.HasDiscriminator(x => x.DocumentType);
    }
}

after saving an entity with

id = new CustomerId(someGuid.ToString())

this is the result, but I expect a GUID as id:

{
   "id": "Customer|Domain.Customers.CustomerId",
   "documentType": "CustomerProfile",
   "firstName": "Moji",
   "partitionKey": "100-2",
   "_rid": "8L5mAKVMiToMAAAAAAAAAA==",
   "_self": "dbs/8L5mAA==/colls/8L5mAKVMiTo=/docs/8L5mAKVMiToMAAAAAAAAAA==/",
   "_etag": "\"00000000-0000-0000-b5ac-bcf438d801d6\"",
   "_attachments": "attachments/",
   "_ts": 1604825656
}

does anyone have an idea where I'm wrong?

Upvotes: 0

Views: 804

Answers (1)

Harshita Singh
Harshita Singh

Reputation: 4870

Convert datatype of Id from CustomerId to string and save the document without adding any value for Id:

public string Id { get; set; }

Cosmos DB will automatically create a GUID for you.

Upvotes: 2

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