Bug: Custom serialization/deserialization using Jackson ObjectMapper is impossible due to ignoring discrimination type getter

[dnowo]

openapi-generator/modules/openapi-generator/src/main/resources/Java/typeInfoAnnotation.mustache

Line 3 in 5c28ab4

@JsonIgnoreProperties(

I think that it should be removed, more details here: #12777

Best solution for fix is to conditionally remove JsonIgnoreProperties annotation which currently is generating likeso:

  @JsonPropertyOrder({
      AbstractRule.JSON_PROPERTY_RULE_TYPE,
      AbstractRule.JSON_PROPERTY_SEVERITY
    })
    @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")



    @JsonIgnoreProperties(
      value = "type", // ignore manually set type, it will be automatically generated by Jackson during serialization
      allowSetters = true // allows the type to be set during deserialization
    )


    @JsonTypeInfo(use = JsonTypeInfo.Id.NAME, include = JsonTypeInfo.As.PROPERTY, property = "type", visible = true)
    @JsonSubTypes({
      @JsonSubTypes.Type(value = EntityVerificationRule.class, name = "impl_1"), // <-- this needs to go first as this is what is defined in the source model
      @JsonSubTypes.Type(value = HostAvailabilityRule.class, name = "impl_2"),  // <-- this needs to go first as this is what is defined in the source model
      @JsonSubTypes.Type(value = EntityVerificationRule.class, name = "Impl1"),
      @JsonSubTypes.Type(value = HostAvailabilityRule.class, name = "Impl2")
    })
    public class Base {
      // ...
    }
    

• Allow disable / configure the code generation of:

    @JsonIgnoreProperties(
      value = "{{{discriminator.propertyBaseName}}}", // ignore manually set {{{discriminator.propertyBaseName}}}, it will be automatically generated by Jackson during serialization
      allowSetters = true // allows the {{{discriminator.propertyBaseName}}} to be set during deserialization
    )

[Mattias-Sehlstedt]

I would suggest adding more background regarding the issues with some example so that it can be reproduced. This so that it is possible to reason regarding the issue and speculate whether the suggested removal is the correct and best approach, or if there might be another way to handle it.

As of now it is difficult to do anything, since the only thing one can to is to attempt to interpret exactly what the title is referring to.