Double Option does not produce distinct results from single Option

[firstdorsal]

When using double options to enable setting a field to null there is not distinction in the resulting spec that enables my rust client generator to create this kind of double option code in rust. If you know what to do it is clear in typescript to either set the field to null or omit it but as rust fields can't just be omitted this does not work.

Is this intended and how could it be fixed?

If single options would not be nullable AND not required a distinction could be made.

#[derive(Serialize, Deserialize, AsChangeset, Validate, ToSchema, Clone, Debug)]
#[diesel(table_name = schema::jobs)]
pub struct UpdateJobChangeset {
    #[schema(max_length = 256)]
    #[validate(max_length = 256)]
    #[diesel(column_name = name)]
    pub new_job_name: Option<String>,
    #[diesel(column_name = execution_information)]
    pub new_job_execution_information: Option<JobExecutionInformation>,
    #[diesel(column_name = persistence)]
    pub new_job_persistence: Option<JobPersistenceType>,
    #[diesel(column_name = deadline_time)]
    #[serde(
        default,
        skip_serializing_if = "Option::is_none",
        with = "::serde_with::rust::double_option"
    )]
    pub new_job_deadline_time: Option<Option<NaiveDateTime>>,
}

"UpdateJobChangeset": {
    "type": "object",
    "properties": {
        "new_job_deadline_time": { "type": ["string", "null"], "format": "date-time" },
        "new_job_execution_information": {
            "oneOf": [
                { "type": "null" },
                { "$ref": "#/components/schemas/JobExecutionInformation" }
            ]
        },
        "new_job_name": { "type": ["string", "null"], "maxLength": 256 },
        "new_job_persistence": {
            "oneOf": [
                { "type": "null" },
                { "$ref": "#/components/schemas/JobPersistenceType" }
            ]
        }
    }
},

TypeScript client gen:

export interface UpdateJobChangeset {
  /** @format date-time */
  new_job_deadline_time?: string | null;
  new_job_execution_information?: null | JobExecutionInformation;
  /** @maxLength 256 */
  new_job_name?: string | null;
  new_job_persistence?: null | JobPersistenceType;
}

When adding #[schema(nullable = false)] to every single option like here it produces the required or IMO expected results, but i can't add that to every single option.

#[derive(Serialize, Deserialize, AsChangeset, Validate, ToSchema, Clone, Debug)]
#[diesel(table_name = schema::jobs)]
pub struct UpdateJobChangeset {
    #[schema(max_length = 256)]
    #[validate(max_length = 256)]
    #[diesel(column_name = name)]
    #[schema(nullable = false)]
    pub new_job_name: Option<String>,
    #[diesel(column_name = execution_information)]
    #[schema(nullable = false)]
    pub new_job_execution_information: Option<JobExecutionInformation>,
    #[diesel(column_name = persistence)]
    #[schema(nullable = false)]
    pub new_job_persistence: Option<JobPersistenceType>,
    #[diesel(column_name = deadline_time)]
    #[serde(
        default,
        skip_serializing_if = "Option::is_none",
        with = "::serde_with::rust::double_option"
    )]
    pub new_job_deadline_time: Option<Option<NaiveDateTime>>,
}

TypeScript client gen:

export interface UpdateJobChangeset {
  /** @format date-time */
  new_job_deadline_time?: string | null;
  new_job_execution_information?: JobExecutionInformation;
  /** @maxLength 256 */
  new_job_name?: string;
  new_job_persistence?: JobPersistenceType;
}