- Why are Querysets considered lazy?
- What is slug in Django?
- What is DetailView in Django?
- What is the difference between a list view and detail view?
- What are generic views?
- What is int PK?
- What is the difference between GET and filter in Django?
- What is pagination Django?
- What is Django filter?
- What is Object_list in Django?
- What is a QuerySet?
- What is name in Django URLs?
- What is Django mixin?
- What is the difference between path and URL in Django?
- What is Context_object_name in Django?
- What is class based view in Django?
- What is generic view in Django?
- What is a URL pattern?
Why are Querysets considered lazy?
No queries were sent to the database.
This is because a Django QuerySet is a lazy object.
It contains all of the information it needs to populate itself from the database, but will not actually do so until the information is needed..
What is slug in Django?
A slug is a short label for something, containing only letters, numbers, underscores or hyphens. They’re generally used in URLs. ( as in Django docs) A slug field in Django is used to store and generate valid URLs for your dynamically created web pages.
What is DetailView in Django?
Django provides several class based generic views to accomplish common tasks. One among them is DetailView. DetailView should be used when you want to present detail of a single model instance. DetailView shouldn’t be used when your page has forms and does creation or update of objects.
What is the difference between a list view and detail view?
what is difference between listview and detailview ? and another question, is detailview for just rendering 1 object ? or can be used for severals ? Generally, Detail is for 1 item, List is for many. Like most things in programming, this can be augmented.
What are generic views?
Django’s generic views… were developed as a shortcut for common usage patterns… They take certain common idioms and patterns found in view development and abstract them so that you can quickly write common views of data without having to repeat yourself.
What is int PK?
What is the difference between GET and filter in Django?
get() returns an object that matches lookup criterion. filter() returns a QuerySet that matche lookup criterion. which means filter() is slightly expensive operation if the model class has a large number of objects, whereas get() is direct approach.
What is pagination Django?
Django provides high-level and low-level ways to help you manage paginated data – that is, data that’s split across several pages, with “Previous/Next” links.
What is Django filter?
Django-filter is a generic, reusable application to alleviate writing some of the more mundane bits of view code. Specifically, it allows users to filter down a queryset based on a model’s fields, displaying the form to let them do this.
What is Object_list in Django?
A page representing a list of objects. … object_list will contain the list of objects (usually, but not necessarily a queryset) that the view is operating upon.
What is a QuerySet?
A QuerySet represents a collection of objects from your database. It can have zero, one or many filters. Filters narrow down the query results based on the given parameters. In SQL terms, a QuerySet equates to a SELECT statement, and a filter is a limiting clause such as WHERE or LIMIT .
What is name in Django URLs?
Django offers a way to name urls so it’s easy to reference them in view methods and templates. The most basic technique to name Django urls is to add the name attribute to url definitions in urls.py .
What is Django mixin?
A Mixin is a special kind of inheritance in Python (and other object-oriented languages) and it’s starting to get a big rise in Django / Web Application Development. … You can use a Mixin to allow classes in Python to share methods between any class that inherits from that Mixin.
What is the difference between path and URL in Django?
In Django 2.0, you use the path() method with path converters to capture URL parameters. path() always matches the complete path, so path(‘account/login/’) is equivalent to url(‘^account/login/$’) . The part in angle brackets (
What is Context_object_name in Django?
Making “friendly” template contexts When you are dealing with an object or queryset, Django is able to populate the context using the lowercased version of the model class’ name. … Providing a useful context_object_name is always a good idea. Your coworkers who design templates will thank you.
What is class based view in Django?
A view is a callable which takes a request and returns a response. This can be more than just a function, and Django provides an example of some classes which can be used as views. These allow you to structure your views and reuse code by harnessing inheritance and mixins.
What is generic view in Django?
Django offers an easy way to set those simple views that is called generic views. Unlike classic views, generic views are classes not functions. … generic, and every generic view is one of those classes or a class that inherits from one of them.
What is a URL pattern?
A URL pattern is a set of ordered characters to which the Google Search Appliance matches actual URLs that the crawler discovers. You can specify URL patterns for which your index should include matching URLs and URL patterns for which your index should exclude matching URLs.