Loading data in a textfield based on another textfield

See more:

Django

Python3.6

I have a form for the model below. And I want a situation where if a user selects an item in the category textfield, all items in relation to that category would be loaded in the name textfied . eg. if a user selects stationary as a category, the name textfield will load data such as pen, pencil, etc which are stored in the database. Any help would be highly appreciated. Thanks

What I have tried:

class Stock (models.Model):
       category = models.ForeignKey(Category, on_delete=models.CASCADE)
       name = models.CharField(max_length= 100)
       quantity = models.IntegerField(defualt=0)
       price = models.IntegerField(default = 0)