Check the user's age (from 6 to 110 years old is acceptable) at the A…

…PI level, update this check at the model level

backend/api/users_serializers.py

@@ -1,12 +1,20 @@
+from dateutil.relativedelta import relativedelta
 from django.contrib.auth import get_user_model
 from django.db import transaction
+from django.utils import timezone
 from djoser.serializers import UserCreateSerializer as DjoserUserCreateSerializer
 from djoser.serializers import UserDeleteSerializer as DjoserUserDeleteSerializer
 from djoser.serializers import UserSerializer as DjoserUserSerializer
 from rest_framework import serializers
 from rest_framework.validators import UniqueValidator
 
-from users.models import Address
+from users.models import (
+    BIRTH_DATE_TOO_OLD_ERROR_MESSAGE,
+    BIRTH_DATE_TOO_YOUNG_ERROR_MESSAGE,
+    MAX_USER_AGE,
+    MIN_USER_AGE,
+    Address,
+)
 from users.utils import city_choices
 
 User = get_user_model()
@@ -69,6 +77,14 @@ class Meta:
             "photo",
         )
 
+    def validate_birth_date(self, value):
+        now = timezone.now()
+        if value + relativedelta(years=MIN_USER_AGE) > now.date():
+            raise serializers.ValidationError(BIRTH_DATE_TOO_YOUNG_ERROR_MESSAGE)
+        if value + relativedelta(years=MAX_USER_AGE) < now.date():
+            raise serializers.ValidationError(BIRTH_DATE_TOO_OLD_ERROR_MESSAGE)
+        return value
+
     def get_address_quantity(self, obj) -> int:
         return obj.addresses.count()
 

backend/users/models.py

@@ -1,3 +1,4 @@
+from dateutil.relativedelta import relativedelta
 from django.contrib.auth.models import AbstractUser
 from django.contrib.auth.validators import UnicodeUsernameValidator
 from django.core.exceptions import ValidationError
@@ -13,6 +14,16 @@
     "форматах '+7XXXXXXXXXX', '7XXXXXXXXXX' или '8XXXXXXXXXX'."
 )
 PHONE_NUMBER_REGEX = r"^(\+7|7|8)\d{10}$"
+MIN_USER_AGE = 6
+MAX_USER_AGE = 110
+BIRTH_DATE_TOO_YOUNG_ERROR_MESSAGE = (
+    "Указана неверная дата рождения, "
+    f"пользователю должно быть не менее {MIN_USER_AGE} лет."
+)
+BIRTH_DATE_TOO_OLD_ERROR_MESSAGE = (
+    "Указана неверная дата рождения, "
+    f"пользователю должно быть не более {MAX_USER_AGE} лет."
+)
 
 
 @cleanup.select
@@ -59,12 +70,16 @@ def clean_fields(self, exclude=None):
         """Checks the user's birth date."""
         super().clean_fields(exclude=exclude)
         now = timezone.now()
-        if self.birth_date:
-            if (
-                self.birth_date.year > now.year
-                or (now.year - self.birth_date.year) > 120
-            ):
-                raise ValidationError("Указана неверная дата рождения.")
+        if (
+            self.birth_date
+            and self.birth_date + relativedelta(years=MIN_USER_AGE) > now.date()
+        ):
+            raise ValidationError(BIRTH_DATE_TOO_YOUNG_ERROR_MESSAGE)
+        if (
+            self.birth_date
+            and self.birth_date + relativedelta(years=MAX_USER_AGE) < now.date()
+        ):
+            raise ValidationError(BIRTH_DATE_TOO_OLD_ERROR_MESSAGE)
 
 
 class Address(models.Model):

pyproject.toml

@@ -24,6 +24,7 @@ pytest = "^7.4.3"
 pytest-django = "^4.7.0"
 django-phonenumber-field = {extras = ["phonenumberslite"], version = "^7.2.0"}
 stripe = "^7.8.2"
+python-dateutil = "^2.8.2"
 
 
 [tool.poetry.group.dev.dependencies]