Why does an error occur when loading fixtures?

Question

Django

The model is like this:

class Employee(models.Model):
    lastname = models.CharField('Фамилия', max_length=50)
    firstname = models.CharField('Имя', max_length=50)
    secondname = models.CharField('Отчество', max_length=50)
    birthdate = models.DateField('Дата рождения')
    email = models.EmailField('Электронная почта', max_length=50)
    phone = models.CharField('Телефон', max_length=15)
    begin_work = models.DateTimeField('Начало работы')
    end_work = models.DateTimeField('Окончание работы', blank=True, null=True, default=None)
    position = models.ForeignKey(Position)
    department = models.ForeignKey(Department)

I submit the fixture in the following format:

[
   {
      "model":"employees.Employee",
      "pk":1,
      "fields":{
         "lastname":"Мишин",
         "firstname":"Мирон",
         "secondname":"Аверьянович",
         "birthdate":"1977-01-30",
         "email":"[email protected]",
         "phone":"86-[phone]",
         "begin_work":"2016-11-25 9:11",
         "end_work":"2016-11-25 17:39",
         "position_id":2,
         "department_id":1
      }
   }
]

Error when loading (loaddata): Could not load employees.Employee(pk=1): Error: value does not fit character varying(15). Why is this happening? What kind of "character varying(15)" type is this? Shouldn't pk be of type int? In addition, the docks show just such a pk format.
Python 3.5, Django 1.10

Answer 1

Show logic. In your error it is written that it does not fit in a field of size 15. Maybe you have a field of size 15 where you shove something more than 15?