# Nullable props (OpenAPI v2)

In the OpenAPI v3 spec you can create properties that can be `NULL`, by providing a `nullable: true` in your schema.
However, the v2 spec does not allow you to do this. You can use the unofficial `x-nullable` in your specification
to generate nullable properties in OpenApi v2.

```json
{
    "ModelWithNullableString": {
        "required": [
            "requiredProp"
        ],
        "description": "This is a model with one string property",
        "type": "object",
        "properties": {
            "prop": {
                "description": "This is a simple string property",
                "type": "string",
                "x-nullable": true
            },
            "requiredProp": {
                "description": "This is a simple string property",
                "type": "string",
                "x-nullable": true
            }
        }
    }
}
```

Generated code:

```typescript
export type ModelWithNullableString = {
    prop?: string | null;
    requiredProp: string | null;
};
```