Update person_form.html

[mkasapoglu]

if user do not select country, updates cities without send request to server. Otherwise server raises internal error.

[delhipnr]

HI its actually awesome, need more help.

My form is like below:
Continent
Country
State
City

Can you please help me on that with form code?

class Continent(models.Model):
name = models.CharField(max_length=30)

def __str__(self):
    return self.name

class Country(models.Model):
name = models.CharField(max_length=30)
continent = models.ForeignKey(Continent, on_delete=models.CASCADE)

def __str__(self):
    return self.name

class State(models.Model):
name = models.CharField(max_length=40)
country = models.ForeignKey(Country, on_delete=models.CASCADE)

def __init__(self):
    return self.name

class City(models.Model):
country = models.ForeignKey(State, on_delete=models.CASCADE)
name = models.CharField(max_length=30)

def __str__(self):
    return self.name

class Person(models.Model):
name = models.CharField(max_length=100)
birthdate = models.DateField(null=True, blank=True)
country = models.ForeignKey(Country, on_delete=models.SET_NULL, null=True)
state = models.ForeignKey(State, on_delete=models.SET_NULL, null=True)
city = models.ForeignKey(City, on_delete=models.SET_NULL, null=True)

def __str__(self):
    return self.name