Creating many-to-many relationships

Module05/bookmarks/account/admin.py

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+from django.contrib import admin
+from .models import Profile
+
+@admin.register(Profile)
+class ProfileAdmin(admin.ModelAdmin):
+    list_display = ['user', 'date_of_birth', 'photo']
+    raw_id_fields = ['user']

Module05/bookmarks/account/apps.py

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+from django.apps import AppConfig
+
+
+class AccountConfig(AppConfig):
+    default_auto_field = 'django.db.models.BigAutoField'
+    name = 'account'

Module05/bookmarks/account/authentication.py

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+from django.contrib.auth.models import User
+
+class EmailAuthBackend():
+    def authenticate(self, request, username=None, password=None):
+        try:
+            user = User.objects.get(email=username)
+            if user.check_password(password):
+                return user
+            return None
+        except (User.DoesNotExist, User.MultipleObjectsReturned):
+            return None
+
+    def get_user(self, user_id):
+        try:
+            return User.objects.get(pk=user_id)
+        except User.DoesNotExist:
+            return None

Module05/bookmarks/account/forms.py

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+from django import forms
+from django.contrib.auth.models import User
+from .models import Profile
+
+
+class LoginForm(forms.Form):
+    username = forms.CharField()
+    password = forms.CharField(widget=forms.PasswordInput)
+
+
+class UserRegistrationForm(forms.ModelForm):
+    password = forms.CharField(label= 'password', widget=forms.PasswordInput)
+    password2 = forms.CharField(label= 'Repeat password', widget=forms.PasswordInput)
+
+    class Meta:
+        model = User
+        fields = ['username', 'first_name', 'email']
+
+    def clean_password2(self):
+        cd = self.cleaned_data
+
+        if cd['password'] != cd['password2']:
+            raise forms.ValidationError("Passwords don't match.")
+        return cd['password2']
+
+    def clean_email(self):
+        data = self.cleaned_data['email']
+        if User.objects.filter(email=data).exists():
+            raise forms.ValidationError('Email already exists.')
+        return data
+
+
+class UserEditForm(forms.ModelForm):
+    class Meta:
+        model = User
+        fields = ['first_name', 'last_name', 'email']
+
+    def clean_email(self):
+        data = self.cleaned_data['email']
+        qs = User.objects.exclude(id=self.instance.id).filter(email=data)
+        if qs.exists():
+            raise forms.ValidationError('Email already exists.')
+        return data
+
+class ProfileEditForm(forms.ModelForm):
+    class Meta:
+        model = Profile
+        fields = ['date_of_birth', 'photo']

Module05/bookmarks/account/migrations/0001_initial.py

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+# Generated by Django 4.2.4 on 2023-09-22 05:52
+
+from django.conf import settings
+from django.db import migrations, models
+import django.db.models.deletion
+
+
+class Migration(migrations.Migration):
+
+    initial = True
+
+    dependencies = [
+        migrations.swappable_dependency(settings.AUTH_USER_MODEL),
+    ]
+
+    operations = [
+        migrations.CreateModel(
+            name='Profile',
+            fields=[
+                ('id', models.BigAutoField(auto_created=True, primary_key=True, serialize=False, verbose_name='ID')),
+                ('date_of_birth', models.DateField(blank=True, null=True)),
+                ('photo', models.ImageField(blank=True, upload_to='users/%Y/%m/%d/')),
+                ('user', models.OneToOneField(on_delete=django.db.models.deletion.CASCADE, to=settings.AUTH_USER_MODEL)),
+            ],
+        ),
+    ]

Module05/bookmarks/account/migrations/0002_alter_profile_photo.py

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+# Generated by Django 4.2.4 on 2023-09-22 14:33
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('account', '0001_initial'),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name='profile',
+            name='photo',
+            field=models.ImageField(blank=True, upload_to='users/%Y/%m/%d'),
+        ),
+    ]

Module05/bookmarks/account/models.py

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+from django.db import models
+from django.conf import settings
+
+class Profile(models.Model):
+    user = models.OneToOneField(settings.AUTH_USER_MODEL, on_delete=models.CASCADE)
+
+    date_of_birth = models.DateField(blank=True, null=True)
+    photo = models.ImageField(upload_to='users/%Y/%m/%d', blank=True)
+
+    def __str__(self):
+        return f'Profile of {self.user.username}'