What is slug field in Django?

What is SlugField in Django? It is a way of generating a valid URL, generally using data already obtained. For instance, using the title of an article to generate a URL.

What does null true mean?

If a string-based field has null=True , that means it has two possible values for “no data”: NULL , and the empty string. In most cases, it’s redundant to have two possible values for “no data;” the Django convention is to use the empty string, not NULL .

What does Models cascade mean?

The on_delete method is used to tell Django what to do with model instances that depend on the model instance you delete. (e.g. a ForeignKey relationship). The on_delete=models. CASCADE tells Django to cascade the deleting effect i.e. continue deleting the dependent models as well.

What is __ str __ in Django?

str function in a django model returns a string that is exactly rendered as the display name of instances for that model. # Create your models here. This will display the objects as something always in the admin interface. Most of the time we name the display name which one could understand using self object.

What exactly is a slug?

Slug, or land slug, is a common name for any apparently shell-less terrestrial gastropod mollusc. Various taxonomic families of land slugs form part of several quite different evolutionary lineages, which also include snails.

What is Get_absolute_url in Django?

get_absolute_url () Define a get_absolute_url() method to tell Django how to calculate the canonical URL for an object. To callers, this method should appear to return a string that can be used to refer to the object over HTTP.

What is blank true null true?

null=True will set the field’s value to NULL i.e., no data. It is basically for the databases column value. date = models.DateTimeField(null=True) blank=True determines whether the field will be required in forms. This includes the admin and your own custom forms.

How do I check if a field is empty in Django?

Unless you set null=True as well, your database should complain if you tried to enter a blank value. If your foreign key field can take null values, it will return None on null, so to check if it was “left blank”, you could simply check if the field is None .

What is PK in Django?

pk is short for primary key, which is a unique identifier for each record in a database. Every Django model has a field which serves as its primary key, and whatever other name it has, it can also be referred to as “pk”.

What is model PY in Django?

Advertisements. A model is a class that represents table or collection in our DB, and where every attribute of the class is a field of the table or collection. Models are defined in the app/models.py (in our example: myapp/models.py)

What is a Dunder in Python?

Dunder or magic methods in Python are the methods having two prefix and suffix underscores in the method name. Dunder here means “Double Under (Underscores)”. These are commonly used for operator overloading. These methods are the reason we can add two strings with ‘+’ operator without any explicit typecasting.