I'm encountering the error "Type object “Factory” has no attribute objects" when trying to render my HTML template that uses the Factory model. I suspect there's an issue with how model managers or attributes are set up in my Django project. I've reviewed the Django documentation on model attributes (https://docs.djangoproject.com/en/4.2/topics/db/models/#model-attributes) but haven't resolved the problem yet.

The project is named "PlatecAdmin" and contains an app called "platec" where all the model, view, and admin files are stored. The error appears on the webpage when I try to load the template associated with the Factory model.

Below are the relevant code snippets:

Model.py

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from django.db import models
from django.conf import settings
from django.contrib.auth.models import User

# Create your models here.

class IsActive(models.Manager):
    def get_queryset(self):
        return super().get_queryset().filter(is_active=True)

class SoftDelete(models.Model):
    is_active = models.BooleanField(default=True, null=False, blank=False)

    all_records = models.Manager()
    active_records = IsActive()

    def soft_delete(self):
        self.is_active = False
        self.save()

    def undelete(self):
        self.is_active = True
        self.save()

    class Meta:
        abstract = True

class SoftDeleteManager(models.Manager):
    def get_queryset(self):
        return super().get_queryset().filter(is_active = True)

class Factory(SoftDelete):
    factory_id = models.AutoField(primary_key=True, null=False, blank=False)
    factory_cd = models.CharField(max_length=3, null=False, blank=False)
    factory_name = models.CharField(max_length=100, null=False, blank=False)
    factory_desc = models.CharField(max_length=255, null=True, blank=True)
    comments = models.CharField(max_length=300, null=True, blank=True)
    created_dt = models.DateField(auto_now_add=True, null=False, blank=False)
    created_by = models.ForeignKey(User, on_delete=models.PROTECT, null=False, blank=False, related_name='cr_factory')
    last_modify_dt = models.DateField(auto_now=True, null=False, blank=False)
    last_modify_by = models.ForeignKey(User, on_delete=models.PROTECT, null=False, blank=False, related_name='lm_factory')

    def __str__(self) -> str:
        return f"{self.factory_id} - {self.factory_cd} - {self.factory_name} - {self.factory_desc} - {self.comments} - {self.created_dt} - {self.created_by} - {self.last_modify_dt} - {self.is_active}"

class Setor(SoftDelete):
    setor_id = models.AutoField(primary_key=True, null=False, blank=False)
    setor_cd = models.CharField(max_length=3, null=False, blank=False)
    setor_name = models.CharField(max_length=100, null=False, blank=False)
    setor_desc = models.CharField(max_length=255, null=True, blank=True)
    comments = models.CharField(max_length=300, null=True, blank=True)
    created_dt = models.DateField(auto_now_add=True, null=False, blank=False)
    created_by = models.ForeignKey(User, on_delete=models.PROTECT, null=False, blank=False, related_name='scr_factory')
    last_modify_dt = models.DateField(auto_now=True, null=False, blank=False)
    last_modify_by = models.ForeignKey(User, on_delete=models.PROTECT, null=False, blank=False, related_name='slm_factory')

    def __str__(self) -> str:
        return f"{self.setor_id} - {self.setor_cd} - {self.setor_name} - {self.setor_desc} - {self.comments}"

class factory_setor(SoftDelete):
    fac_set_id = models.AutoField(primary_key=True, null=False, blank=False)
    factory = models.ForeignKey(Factory, on_delete=models.PROTECT)
    setor = models.ForeignKey(Setor, on_delete=models.PROTECT)
    created_dt = models.DateField(auto_now_add=True, null=False, blank=False)
    created_by = models.ForeignKey(User, on_delete=models.PROTECT, null=False, blank=False, related_name='fscr_factory')
    last_modify_dt = models.DateField(auto_now=True, null=False, blank=False)
    last_modify_by = models.ForeignKey(User, on_delete=models.PROTECT, null=False, blank=False, related_name='fslm_factory')

    def __str__(self) -> str:
        return f"{self.fac_set_id} - {self.factory} - {self.setor}"

Admin.py

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from django.contrib import admin
from django.forms import ModelForm
from django.http import HttpRequest
from .models import Factory, factory_setor, Setor

@admin.register(Factory)
class FactoryAdmin(admin.ModelAdmin):
    list_display = ('factory_id', 'factory_cd', 'factory_name', 'factory_desc', 'comments')
    list_filter = ('is_active', 'factory_name')
    search_fields = ('factory_cd' 'factory_name',)
    actions = ['restore_selected', 'inactivate_records']

    def restore_selected(modelAdmin, request, queryset):
        queryset.update(is_active=True)

    def inactivate_records(modelAdmin, request, queryset):
        queryset.update(is_active=False)

    def has_delete_permission(self, request, obj=None):
        return False

    def save_model(self, request, obj, form, change):
        if not change:
            obj.created_by = request.user
            obj.last_modify_by = request.user
        else:
            obj.last_modify_by = request.user
        return super().save_model(request, obj, form, change)

    restore_selected.short_description = 'Activate selected Records'
    inactivate_records.short_description = 'Inactivate selected Records'

    exclude = ['created_by', 'last_modify_by']

View.py

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from django.shortcuts import render
from django.http import HttpResponse
from django.template import loader
from .models import Factory, factory_setor, Setor

def platec(request):
    template = loader.get_template('test.html')
    return HttpResponse(template.render())

def factory(request):
    myfactories = Factory.objects.all().values()
    template = loader.get_template('factories.html')
    context = {
        'myfactories': myfactories,
    }
    return HttpResponse(template.render(context, request))

I’d appreciate any guidance on diagnosing and fixing this issue, particularly around the model manager setup. Thanks in advance!