<null> nil 的问题

**环境：Swift、Nodejs**
**版本：4.1.1**
**Model**

**从Model取值**

**formData Logs**
["latitude": nil, "name": nil, "location_info": nil, "new_user": Optional("1"), "gender": nil, "phone_number": Optional("18710106556"), "user_id": Optional("5b2e2d24744fd3e5429717c9"), "avatar_url": Optional("5b2e2d24744fd3e5429717c9_20180623192123"), "passwords": nil, "longitude": nil, "sign": nil]

**Nodejs接收的值为**

**怎么处理掉\呢**

No source files, tests, or entry points are identified in the report. Start by reproducing the nil-value mapping with the provided Swift 4.1.1 and Node.js setup, then trace how the model values become form data and are received by Node.js. Done means establishing the expected null representation and confirming that all affected fields follow it.

Written by the indexing model from the issue text.