Drupal Contextual filters

Contextual filters are the Views mechanism for dynamically refining the contents of a view. It might be also called as "dynamic filters".  Contextual filters in the Views UI, and review the Taxonomy term view that comes with Drupal and how it uses a contextual filter.

For example

A contextual filter for a node author would be able to display all nodes written by the currently logged in user.

Step 1

We have to go through basic View Page creation by visiting /admin/structure/views/add

Fill up View Basic information, Page settings detail and click on Save and edit. 

I have created a view with below input.

View Basic Information

         View name: Article

         Description: listing article created by logged in User

View Settings

         Show: Content

         of Type: Article

         

Page Settings

        Page Title: Article

        Path: article

Page Display Settings

         Display format: Table

Step 2

Once we have done with Step1, next we would be redirected to View Settings Page. Here I have added Body, Authored by & Authored on under Fields Section. Now click the Advanced Section on extreme right and click on CONTEXTUAL FILTERS “Add” button.

FIELDS

     Content: Body

     Content: Authored by (Authored by)

     Content: Authored on (Authored on)

Step 3

Search For “Authored by” and click on Apply (all displays).

Step 4

Select “Provide default value” under WHEN THE FILTER VALUE IS NOT IN THE URL & Select Type as “User ID from logged in user” and click on Apply (all displays).

Step 5

So, we are done with view creation. It’s time to review by visiting

the URL: localhost/d8/article

This page is showing articles created by logged in users and we don’t have to pass any additional argument. Try logging with some other user credentials and visit article-by-you page to test the view we have created just now.