如何在 Django Admin 中禁用事务？

Question

I used @transaction.non_atomic_requests for the overridden save() in Person model as shown below:

# "store/models.py"

from django.db import models
from django.db import transaction

class Person(models.Model):
    name = models.CharField(max_length=30)
    
    @transaction.non_atomic_requests # Here
    def save(self, *args, **kwargs):
        super().save(*args, **kwargs)

And, I also used @transaction.non_atomic_requests for the overridden save_model() in Person admin as shown below:

# "store/admin.py"

from django.contrib import admin
from .models import Person
from django.db import transaction

@admin.register(Person)
class PersonAdmin(admin.ModelAdmin):

    @transaction.non_atomic_requests # Here
    def save_model(self, request, obj, form, change):
        obj.save()

But, when adding data as shown below:

Transaction is used as shown below. *I use PostgreSQL and these logs below are the queries of PostgreSQL and you can check On PostgreSQL, how to log queries with transaction queries such as "BEGIN" and "COMMIT" :

And, when changing data as shown below:

Transaction is used as shown below:

And, when clicking Delete button of Change person as shown below:

Then clicking Yes, I'm sure button to delete data as shown below:

Transaction is used as shown below:

And, when selecting Delete selected persons and clicking Go button of Select person to change as shown below:

Then clicking Yes, I'm sure button to delete data as shown below:

Transaction is used as shown below:

So, how can I disable transaction in Django Admin ?

Answer 1

First to disable transaction when adding and changing data, you need to override changeform_view() in Person admin as shown below:

# "store/admin.py"

from django.contrib import admin
from .models import Person
from django.utils.decorators import method_decorator
from django.views.decorators.csrf import csrf_protect

csrf_protect_m = method_decorator(csrf_protect)

@admin.register(Person)
class PersonAdmin(admin.ModelAdmin):

    @csrf_protect_m # Here
    def changeform_view(self, request, object_id=None, form_url="", extra_context=None):
        return super()._changeform_view(request, object_id, form_url, extra_context)

Because by default, changeform_view() has with transaction.atomic(...): to use transaction when adding and changing data as shown below:

class ModelAdmin(BaseModelAdmin):
    
    # ...
    
    @csrf_protect_m
    def changeform_view(self, request, object_id=None, form_url="", extra_context=None):
        with transaction.atomic(using=router.db_for_write(self.model)): # Here
            return self._changeform_view(request, object_id, form_url, extra_context)

As a result, when adding data as shown below:

Transaction is not used as shown below:

And, when changing data as shown below:

Transaction is not used as shown below:

Next to disable transaction when clicking Delete button of Change person then clicking Yes, I'm sure button to delete data, you need to override delete_view() in Person admin as shown below:

# "store/admin.py"

from django.contrib import admin
from .models import Person
from django.utils.decorators import method_decorator
from django.views.decorators.csrf import csrf_protect

csrf_protect_m = method_decorator(csrf_protect)

@admin.register(Person)
class PersonAdmin(admin.ModelAdmin):

    @csrf_protect_m # Here
    def delete_view(self, request, object_id, extra_context=None):
        return self._delete_view(request, object_id, extra_context)

Because by default, delete_view() has with transaction.atomic(...): to use transaction when clicking Delete button of Change person then clicking Yes, I'm sure button to delete data as shown below:

class ModelAdmin(BaseModelAdmin):
    
    # ...
    
    @csrf_protect_m
    def delete_view(self, request, object_id, extra_context=None):
        with transaction.atomic(using=router.db_for_write(self.model)): # Here
            return super()._delete_view(request, object_id, extra_context)

As a result, when clicking Delete button of Change person as shown below:

Then clicking Yes, I'm sure button to delete data as shown below:

Transaction is not used as shown below:

Next to disable transaction when selecting Delete selected persons and clicking Go button of Select person to change then clicking Yes, I'm sure button to delete data, you need to override delete_queryset() in Person admin then run a raw query with cursor.execute() as shown below:

# "store/admin.py"

from django.contrib import admin
from .models import Person
from django.db import connection

@admin.register(Person)
class PersonAdmin(admin.ModelAdmin):

    def delete_queryset(self, request, queryset): # Here
        ids = ()
        
        if len(queryset) > 1:
            for obj in queryset:
                ids += (obj.id,)
            ids = str(ids)
        else:
            ids = "(" + str(queryset[0].id) + ")"

        with connection.cursor() as cursor:
            query = 'DELETE FROM "store_person" WHERE "store_person"."id" IN ' + ids
            cursor.execute(query)

Because by default, delete_queryset() has queryset.delete() which runs DELETE query with transaction when selecting Delete selected persons and clicking Go button of Select person to change then clicking Yes, I'm sure button to delete data as shown below:

class ModelAdmin(BaseModelAdmin):
    
    # ...
    
    def delete_queryset(self, request, queryset):
        """Given a queryset, delete it from the database."""
        queryset.delete() # Here

As a result, when selecting Delete selected persons and clicking Go button of Select person to change as shown below:

Then clicking Yes, I'm sure button to delete data as shown below:

Transaction is not used as shown below: