Being new to Django, sometimes I face interesting problems. If it is very late and you are very tired, It may not always be easy to see the problem looking at the displayed error message like this int’ object has no attribute ‘keys’ error message I got in cursor.execute() method 🙂 This error was thrown on the […]
Django’s reverse method can be found under django.core.urlresolvers (new versions: django.urls). To be able to use it you should import it like so:
1 | from django.core.urlresolvers import reverse |
reverse method is used to generate urls so that you can use them in your template files, model methods, view methods etc. Why do we use them? We use them not to […]
related_name is an attribute you use while defining relations like many-to-one, many-to-many, one-to-one etc. The value of this attribute is used as the name of the reverse relation between models. Example:
1 2 | class Page(models.Model): site = models.ForeignKey(Site, related_name='myapp_pages') |
Here we define a many-to-one relation using a Foreign Key. A Site can have many Pages. The relation from a Site to its […]
Django “no such table” error of death.. I recently encountered this “no such table” error while trying to run makemigrations command on PyCharm. I dropped database tables related to my app, cleaned django_migrations table for this app, cleared migrations folder as described in this post: http://big.info/2016/07/django-clear-migrations-re-migrate.html. Then I ran makemigrations… No such table.. I did lots of […]
Debugging a Django project in PyCharm is actually quite easy. All you need to do is add couple of breakpoints and hit that little debug button you see at the top right corner of the IDE. Now when you run your app, PyCharm’s Django debugger should stop at those breakpoints, right? Nope, not that straightforward. […]
I wanted to write 1 more post in 2016 before the year ends. So, here it is 🙂 Let’s talk a little more about Virtual Environments. If you have a virtual environment you can back it up and re-create it later with the exact same installations in it. No need to worry about what and which […]
Ajax request are everywhere in modern web applications. No matter which platform you are using for development, the main scheme is always the same. You send a request to a server side method using JavaScript, jQuery etc. and server processes the request, prepares the response and sends this response to client (browser). Finally, response is […]
In your Django website you have models. These models represent tables in your database. So, what would you do if you wanted to record new model data into your DB? How would you get user input? Of course, using forms. There is an impractical way to do this but let’s skip that and show the […]
As you already know when a request comes to your Django site, it first looks for the url patterns of your site and once a patter is matched related view function is called passing some arguments to that function. But how do you catch those arguments? How do you know which arguments you are sending […]
For the new comers Django’s Get and Filter functions may be consuming when it comes to decide which one to use. The primary difference between the two is Get will return exactly one object while Filter will return a query object even if the result set contains only a single object. GET Returns the object matching […]