Drupal how does views work

These hooks allow you to alter the view results, access conditions, arguments, or render output of different elements of the view programmatically. Learn more about the build and render cycle and how these hooks influence it in Understand the Views Build and Render Cycle. These hooks allow you to manipulate the query that Views will use to retrieve data prior to its execution. It can be used to add or change conditions, add joins, modify a query's sort and range, and add grouping to the query.

Learn more in Alter the Query Used for a View. See the full list of Views hooks on Drupal. Views plugins are objects that are used to build and render a view. They're used primarily in situations where the Views UI needs to allow a site builder to be able to choose from one of many options. For example: What field s do I want to display? How should this data get sorted? What format should the output be?

Views plugins fall under different categories. The largest category is handlers. Handlers are special plugins that are used to handle different parts of the query process -- filters, sorts, joins, arguments -- and Views render elements such as fields and areas. Plugins that fall outside of the handler category are responsible for access checks, caching, displays page vs.

REST , wizard options, query objects and styles table vs. RSS vs. Frequently, developers declare their custom plugins or extend default ones to handle filtering, sorting and rendering, and to add custom validation rules for arguments and access callbacks. If your goal is to add a new option to the list of fields, sorts, filters, or other lists of things that a site builder can choose from when constructing a view, chances are you want to create a new plugin. This is also true if you want to modify how one of the existing options works; the plugin system makes it possible to extend an existing plugin and add new features to it.

The full list of possible Views plugins sub-categories can be found on Drupal. Note: We're currently working on adding more tutorials that cover common use cases for Views plugins and will link to them here when they are complete. Coming Soon Free. Views: Create Lists with Drupal. Site Building , Theming , Drupal 8. Views for Developers.

Module Development , Drupal 9 , Drupal 8. HD CC. Introduction to Views in Drupal. Site Building , Drupal 8 , Drupal 7. Markup in Drupal. Site Building , Theming , Drupal 7. When talking about lists, it is common to think of results with more than one element, usually many. For example, the most visited article in the last month, the most attended event last year, the most recent product added to the store, etc.

Another use case for a view of one element is when you want to show something random. The use cases for Views are endless. Some will require the use of contributed modules , but it is possible to build many things with core Views functionality. Here is a very short list of things that you can built with Views:. Views is an extremely powerful system and a key differentiator of Drupal compared to other content management systems CMSs and frameworks.

We have only scratched the surface of what is possible in this blog post. Core Views has many other concepts like contextual filters and relationships that were not explained. Using contributed modules or custom code you can flex Views to match specific needs. For example, you can extend Views using plugins to create your own fields, filter criteria, sort criteria, etc. You can also use hooks to alter the SQL query itself. Additionally, you can rewrite results and theme the output. With so many moving parts, it might be daunting to learn Views.

My recommendation is to learn one concept at a time and tinker with existing views, like the ones that come with Drupal core, to learn how they work. About 8 years ago, Johan Falk created one of the best resources to learn Views I have seen so far. Similarly to the Drupal concepts we have been learning so far, Views concepts have not changed significantly since the release of that video series. Kudos to Johan for creating many valuable Drupal tutorials back in the day.

How familiar were you with Drupal Views? What are some concepts that you find hard to understand? What contributed modules do you know that extend Views functionality? Breadcrumb Home. What is a view in Drupal? How do they work? Understanding Views terminology There are three key terms that you need to be aware of: the Views module, the Views UI module, and a view instance. How do Drupal views work? Dynamic results Views is one of the many systems that allow you to create dynamic sites with Drupal.

Views with only one result We said that views are used to create a listing of elements. Other use cases The use cases for Views are endless. Here is a very short list of things that you can built with Views: An interactive map like the one at Drupical.

Search for Authored on and click on Apply all displays. Here we we can set the page url path. Pager settings page has item per page, offset, Pager ID, Pager link labels, exposed options etc. There is additional Exposed Option to control selected option Allow end user to control selected display options for the view.

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