gpp/port/models.py

from django.db import models
from django.db.models import Model, CharField, EmailField, \
    DateTimeField, DecimalField, ForeignKey

class Address(Model):
    address = CharFIELD(MAX_length=254)
    zip_code = CharField(max_length=10)
    city = CharField(max_length=200)
    country = CharField(max_length=200)

class Person(Model):
    name = CharField(max_length=50)
    surname = CharField(max_length=50)
    nationality = CharField(max_length=200)
    email = EmailField(max_length=200)
    phone = CharField(max_length=20)

    # Foreign keys
    address = ForeignKey(Address)

class Company(Model):
    name = CharField(max_length=50)
    address = CharField(max_length=254)
    nationality = CharField(max_length=50)
    email = EmailField(max_length=200)
    phone = CharField(max_length=20)

class Insurance(Company):
    pass

class Boat(Model):
    name = CharField(max_length=50)
    registration_num = CharField(max_length=20)
    length = DecimalField()
    beam = DecimalField()
    water_draught = DecimalField()
    tonnage = DecimalField()
    water_tank = DecimalField()
    model = CharField(max_length=50)
    heating = CharField(max_length=50)

    # Foreign keys
    insurance = Insurance()

class Port(Model):
    name = CharField(max_length=50)
    address = CharField(max_length=254)

class Dock(Model):
    num = CharField(max_length=4)
    length = DecimalField()
    width = DecimalField()
    depth = DecimalField()

class Plug(Model):
    num = CharField(max_length=4)
    amperage = DecimalField()
    voltage = DecimalField()

class Tap(Model):
    num = CharField(max_length=4)

class Stay(Model):
    arrival = DateTimeField()
    departure = DateTimeField()
    coming_from = CharField(max_length=150)
    going_to = CharField(max_length=150)

class PaymentType(Model):
    name = CharField(max_length=20)

class Payment(Model):
    num = CharField(max_length=40)
    date = DateTimeField()
    pay_type = ForeignKey(PaymentType)
    amount = DecimalField()

class Service(Model):
    service_type = CharField(max_length=50)

class Bill_line(Model):
    service = Service()
    quantity = DecimalField()