Adding phone number valdator to member model

src/meshapi/models/member.py

@@ -4,6 +4,8 @@
 from django.db.models.fields import EmailField
 from django_jsonform.models.fields import ArrayField as JSONFormArrayField
 
+from meshapi.validation import validate_phone_number_field
+
 
 class Member(models.Model):
     name = models.CharField(help_text='Member full name in the format: "First Last"')
@@ -22,7 +24,7 @@ class Member(models.Model):
         help_text="Any additional email addresses associated with this member",
     )
     phone_number = models.CharField(
-        default=None, blank=True, null=True, help_text="A contact phone number for this member"
+        default=None, blank=True, null=True, help_text="A contact phone number for this member", validators=[validate_phone_number_field]
     )
     slack_handle = models.CharField(default=None, blank=True, null=True, help_text="The member's slack handle")
     notes = models.TextField(

src/meshapi/validation.py

@@ -2,6 +2,8 @@
 import logging
 from dataclasses import dataclass
 
+from django.core.exceptions import ValidationError
+
 import phonenumbers
 import requests
 from validate_email import validate_email
@@ -33,6 +35,9 @@ def validate_phone_number(phone_number: str) -> bool:
         return False
     return True
 
+def validate_phone_number_field(phone_number: str):
+    if not validate_phone_number(phone_number):
+        raise ValidationError(f"Invalid phone number: {phone_number}")
 
 # Used to obtain info about addresses within NYC. Uses a pair of APIs
 # hosted by the city with all kinds of good info. Unfortunately, there's