ModelMetadataType attributes are ignored if the target class is inherited

[whitebehemoth]

Version="6.4.0"
Steps to reproduce:

1. Extend a base DTO and use metadata attributes to differentiate DTOs for different actions.
2. Reference inherited classes and generate Swagger.json

  public class BaseDto
   {
       public Guid Id { get; set; }
       public Guid ProductId { get; set; }
       [StringLength(255)]
       public string? Name { get; set; }
   }

   [ModelMetadataType(typeof(CreateDtoMetadata))]
   public class CreateDto : BaseDto     {    }

   [ModelMetadataType(typeof(UpdateDtoMetadata))]
   public class UpdateDto : BaseDto    {    }

   public class CreateDtoMetadata
   {
       [Required]
       public Guid ProductId { get; set; }
       [Required]
       public string? Name { get; set; }
   }
   public class UpdateDtoMetadata
   {
       [Required]
       public Guid Id { get; set; }
       [Required]
       public string? Name { get; set; }
   }

Expected result: In generated swagger.json both CreateDto and UpdateDto schemas should be different and have the combination of the attributes from Base DTO class and from corresponded metadata classes:

"CreateDto": {
        "required": ["name","productId"],
        "type": "object",
        "properties": {
        "id": {"type": "string", "format": "uuid"},
        "productId": {"type": "string", "format": "uuid"},
        "name": {"maxLength": 255,"minLength": 0,"type": "string"}
},"additionalProperties": false}

"UpdateDto": {
        "required": ["id","name"],
        "type": "object",
        "properties": {"id": {"type": "string","format": "uuid"},
        "productId": {"type": "string","format": "uuid"},
        "name": {"maxLength": 255,"minLength": 0,"type": "string"}
},
"additionalProperties": false
},

Actual result: both inherited classes are identical, attributes from metadata classes are ignored

"CreateDto": {
        "type": "object",
        "properties": {
        "id": {"type": "string","format": "uuid"},
        "productId": {"type": "string","format": "uuid"},
        "name": {"maxLength": 255,"minLength": 0,"type": "string", "nullable": true}
},
"additionalProperties": false
},

[github-actions]

This issue is stale because it has been open for 60 days with no activity. It will be automatically closed in 14 days if no further updates are made.

[martincostello]

Looks like this might be a duplicate of #1981.

[github-actions]

This issue is stale because it has been open for 60 days with no activity. It will be automatically closed in 14 days if no further updates are made.

[github-actions]

This issue was closed because it has been inactive for 14 days since being marked as stale.