How to implement a query in the database with a count of the number of words?

Question

Django

Hello, the bottom line is this.
The table has a column that stores words separated by spaces. Example: Vasya Petya word phrase
You need to make a query using the django ORM that will select records based on the number of words in this column.
As I think to implement, first you need to count the number of words in the column, and then select those records that are equal to the desired number and then a stupor. I can not implement both counting and comparison at the same time.
Model.objects.filter (we count the number of words in the column = 2)
I assume that you need to use Func, but the request itself is not clear.
Help me please.