from django.db import models

from .course import Course
from .vessel import Vessel


class CrewMember(models.Model):
    pin = models.IntegerField(primary_key=True)
    first_name = models.CharField(max_length=256)
    last_name = models.CharField(max_length=256)
    email = models.EmailField()
    dob = models.DateField()


class CourseAssignment(models.Model):
    crew = models.ForeignKey(CrewMember, models.CASCADE)
    course = models.ForeignKey(Course, models.CASCADE)
    vessel = models.ForeignKey(Vessel, models.CASCADE, null=True)