在Django中，如何将ForeignKey传递给Model的实例？

I am writing an application which stores "Jobs". They are defined as having a ForeignKey linked to a "User". I don't understand how to pass the ForeignKey into the model when creating it. My Model for Job worked fine without a ForeignKey, but now that I am trying to add users to the system I can't get the form to validate.I am writing an application which stores "Jobs"