I’ve made a migration that added a new table and want to revert it and delete the migration, without creating a new migration. How do I do it? Is there a command to revert last migration and then I can simply delete the migration file? 13 s 13 You can revert by migrating to the … Read more
I have to use Python and Django for our application. So I have two versions of Python, 2.6 and 2.7. Now I have installed Django. I could run the sample application for testing Django succesfuly. But how do I make sure whether Django uses the 2.6 or 2.7 version and what version of modules Django … Read more
When I read Django code I often see in models what is called a “slug”. I am not quite sure what this is, but I do know it has something to do with URLs. How and when is this slug-thing supposed to be used? (I have read its definition in this glossary.) 13 s 13 … Read more
Closed. This question needs to be more focused. It is not currently accepting answers. Want to improve this question? Update the question so it focuses on one problem only by editing this post. Closed 6 years ago. Improve this question As a newbie to Django, I am having difficulty making an upload app in Django … Read more
Is it possible to temporarily disable constraints in MySQL? I have two Django models, each with a foreign key to the other one. Deleting instances of a model returns an error because of the foreign key constraint: cursor.execute(“DELETE FROM myapp_item WHERE n = %s”, n) transaction.commit_unless_managed() #a foreign key constraint fails here cursor.execute(“DELETE FROM myapp_style … Read more
I am trying to build the search for a Django site I am building, and in that search, I am searching in three different models. And to get pagination on the search result list, I would like to use a generic object_list view to display the results. But to do that, I have to merge … Read more
In Django model QuerySets, I see that there is a __gt and __lt for comparative values, but is there a __ne or != (not equals)? I want to filter out using a not equals. For example, for Model: bool a; int x; I want to do results = Model.objects.exclude(a=True, x!=5) The != is not correct … Read more
I would like to know what are all the possible values for the timezone argument in the Python library pytz. How to do it? 10 s 10 You can list all the available timezones with pytz.all_timezones: In [40]: import pytz In [41]: pytz.all_timezones Out[42]: [‘Africa/Abidjan’, ‘Africa/Accra’, ‘Africa/Addis_Ababa’, …] There is also pytz.common_timezones: In [45]: len(pytz.common_timezones) … Read more
Want to improve this post? Provide detailed answers to this question, including citations and an explanation of why your answer is correct. without enough detail may be edited or deleted. When we add a database field in django we generally write: models.CharField(max_length=100, null=True, blank=True) The same is done with ForeignKey, DecimalField etc. What is the … Read more
Closed. This question needs to be more focused. It is not currently accepting answers. Want to improve this question? Update the question so it focuses on one problem only by editing this post. Closed 5 years ago. Improve this question I’m building a web application with Django. The reasons I chose Django were: I wanted … Read more
