How to set last login to read only in the admin pages

Using Django The Admin
1

I’m trying to set the last_login and date_joined fields on my custom user model to read only in the admin forms, but I really can’t figure out what I’m doing wrong.

My models.py:

# Create your models here.
from django.contrib.auth.models import AbstractBaseUser, PermissionsMixin
from django.db import models
from django.utils import timezone
from django.utils.translation import gettext_lazy as _

from .managers import CustomUserManager


class CustomUser(AbstractBaseUser, PermissionsMixin):
    email = models.EmailField(unique=True)
    first_name = models.CharField(max_length=30)
    last_name = models.CharField(max_length=30)
    is_active = models.BooleanField(default=True)
    is_staff = models.BooleanField(default=False)
    is_superuser = models.BooleanField(default=False)

    email_is_verified = models.BooleanField(default=False)
    date_joined = models.DateTimeField(default=timezone.now)

    objects = CustomUserManager()

    USERNAME_FIELD = "email"
    REQUIRED_FIELDS = ["first_name", "last_name"]

    def __str__(self):
        return self.email

    def save(self, *args, **kwargs):
        super().save(*args, **kwargs)

My admin.py:

from django import forms
from django.contrib import admin
from django.contrib.auth.forms import ReadOnlyPasswordHashField
from django.core.exceptions import ValidationError

from .models import CustomUser


class CustomUserCreationForm(forms.ModelForm):
    password1 = forms.CharField(label="Password", widget=forms.PasswordInput)
    password2 = forms.CharField(
        label="Password confirmation", widget=forms.PasswordInput
    )

    class Meta:
        model = CustomUser
        fields = ["email", "first_name", "last_name"]

    def clean_password2(self):
        # Check that the two password entries match
        password1 = self.cleaned_data.get("password1")
        password2 = self.cleaned_data.get("password2")
        if password1 and password2 and password1 != password2:
            raise ValidationError("Passwords don't match")
        return password2

    def save(self, commit=True):
        # Save the provided password in hashed format
        user = super().save(commit=False)
        user.set_password(self.cleaned_data["password1"])
        if commit:
            user.save()
        return user


class CustomUserChangeForm(forms.ModelForm):

    password = ReadOnlyPasswordHashField()

    class Meta:
        model = CustomUser
        fields = [
            "email",
            "password",
            "is_active",
            "email_is_verified",
        ]
        readonly_fields = ["last_login", "date_joined"]


class CustomUserAdmin(admin.ModelAdmin):
    form = CustomUserChangeForm
    add_form = CustomUserCreationForm
    model = CustomUser
    list_display = (
        "email",
        "first_name",
        "last_name",
        "is_staff",
        "is_active",
    )
    list_filter = (
        "email",
        "is_staff",
        "is_active",
    )
    ordering = ("email",)
    search_fields = ("email",)
    add_fieldsets = (
        (
            None,
            {
                "classes": ("wide",),
                "fields": (
                    "email",
                    "first_name",
                    "last_name",
                    "password1",
                    "password2",
                ),
            },
        ),
    )
    fieldsets = (
        (None, {"fields": ("email", "password")}),
        ("Personal info", {"fields": ("first_name", "last_name")}),
        ("Account status", {"fields": ("is_active", "email_is_verified")}),
        (
            "Permissions",
            {
                "fields": (
                    "is_staff",
                    "is_superuser",
                    "groups",
                    "user_permissions",
                ),
            },
        ),
        ("Important dates", {"fields": ("last_login", "date_joined")}),
    )


# Register your models here.
admin.site.register(CustomUser, CustomUserAdmin)
2

You want to add those fields to the readonly_fields of the ModelAdmin class, not the form class.

See The Django admin site | Django documentation | Django

3

Thanks! That was it. I knew I was overlooking something very simple