Django rest framework filtering foreign key value and setting userId = current user

[chern...@gmail.com]

So i have a family and schedule model. Family is to add family member and schedule is to create schedule with family as a foreign key in it.

But in both api, userId field is a drop down field to select which a user instead of using fix at the current userId.

The code and more specific about my problem is here: https://stackoverflow.com/questions/48088912/django-rest-framework-foreign-key-multiple-data

Sorry for my inexperience as this is my first time creating such a huge API. Please give me guidance on how to do this.