[BUG] No more inheritance for components generated by version 5.0.0

Description

No schema inheritance.

openapi-generator version

5.0.0

OpenAPI declaration file content or url

schemas:
  UserDTO:
      type: object
      properties:
        id:
          type: string
          minLength: 1
          maxLength: 20

  QueryUserResponseDTO:
      type: object
      allOf:
        - $ref: '#/components/schemas/UserDTO'

Generation Details

The above YAML produces:

public class QueryUserResponseDTO   {
   private @Valid String id;
}

Instead as for the 4.3.1:

public class QueryUserResponseDTO extends UserDTO   {
}

Suggest a fix

Does exist a configuration parameter to enforce the DTO inheritance generation? Or it is a bug?

[rgoers]

The problem is that the base class can’t always know all the classes that will extend it. In my case, #9756 it isn’t even necessary as the base class isn’t used for Serialization/Deserialization. But I need the base class for methods that operate on the fields it provides. In my environment we have a “BasePage” object for paged requests. All the services that need paging extend that. BasePage can’t possibly know all the services that will support paging as it is in a common library that the services import. This change has made it impossible to support this.

[Msurrow]

Just to confirm. I updated from 4.3.1 -> 5.0.0 and I’m seeing the same issue (with dotnet-core generator) and AllOf inheritance. For us, this makes vers 5.0.0 unusable.

If any help, here is a git diff of 4.3.1 generated class and 5.0.0 generated class which shows the issue:

• superclass gone form class signature
• base construtor not called
• superclass properties added to subclass

namespace FOOBAR.Model
 {
@@ -29,7 +29,7 @@ namespace FOOBAR.Model
     /// ProductBankLoan
     /// </summary>
     [DataContract(Name = "ProductBankLoan")]
-    public partial class ProductBankLoan : Product, IEquatable<ProductBankLoan>
+    public partial class ProductBankLoan : IEquatable<ProductBankLoan>, IValidatableObject
     {
         /// <summary>
         /// Initializes a new instance of the <see cref="ProductBankLoan" /> class.
@@ -38,9 +38,12 @@ namespace FOOBAR.Model
         /// <param name="productID">productID.</param>
         /// <param name="debtors">debtors.</param>
         /// <param name="collaterals">collaterals.</param>
-        public ProductBankLoan(double balance = default(double), int productID = default(int), List<Debtor> debtors = default(List<Debtor>), List<Collateral> collaterals = default(List<Collateral>)) : base(productID, debtors, collaterals)
+        public ProductBankLoan(double balance = default(double), int productID = default(int), List<Debtor> debtors = default(List<Debtor>), List<Collateral> collaterals = default(List<Collateral>))
         {
             this.Balance = balance;
+            this.ProductID = productID;
+            this.Debtors = debtors;
+            this.Collaterals = collaterals;
         }