Skip to main content

Things You Must Know Before Trying Forms In Drupal 8.


 You Should Invest In Forms

                     What does your customer think?  What do they looking for? will decide the success of any business.

   In a digital marketing, Most of the customer requirement is gathered through forms. So its

  essential  to spend some  time with forms


Example : a user can search a particular product using the search form on an e-commerce website.

Form API in Drupal 8 


        As we know already Drupal use forms for most of the administrative site building.

Drupal 8 follows object-oriented style of programming with the integration of symfony .


Based on the purpose of the form, it can inherit the basic properties and methods of the below classes.


 1.Config Base
2.FormBase
3.ConfirmBase

 Note: Routing configuration is done through the yml files in drupal 8

When the user hits the valid url in the browser , Major Responses are

1.Page Content
2.Forms
3.Map..etc.

Basic Routing Configuration for Form

Internal path-machine-name
       Path: url of the path
       Default
       Form:Name of the  Form class with the name space
      requirements:
   _permission: 'access content'

Example:
  user.multiple_cancel_confirm:
  path: '/admin/people/cancel'
  defaults:
    _form: '\Drupal\user\Form\UserMultipleCancelConfirm'
    _title: 'Cancel user'
  requirements:
    _permission: 'administer users'


To know more about routing  options Check this  Link Routing In Drupal 8

In this Post we will examine Basic Form 


Namespace
         namespace is like a pointer to a file path where you can find the source of the function you are working with.


Use statement
      The ability to refer to an external fully qualified name with an alias, or importing, using the use operator


FormBase , FormStateInterface are the two classes  which defines most of the basic
properties of any form . So it is essential to extend your form with FormBase Class


1.BuildForm -  is a function which is defined in formbase class, it is mainly used to describe the form elements

2.getFormId - It returns the form id

3.validateForm -  This function is used to perform some of the server side validation before submitting to the server or database

4.submitForm  - Its is used  to retrieve the submitted values and made the other  logics with the submitted dat


Here i have covered very basic example and explanation . Follow the drupal org documentaion to more information.
  



Comments

Post a Comment

Popular posts from this blog

Redirection In Drupal 8 Programatcially

Redirection In Drupal 8  In this post we can learn about the ways we can make redirect in Drupal 8. You can make a custom redirect according to the context in many ways. Form Redirect      We can use the formstate object to redirect from form.     Currently below two methods are available from Drupal\Core\Form  formstate to build  a    \Symfony\Component\HttpFoundation\RedirectResponse  for redirection. 1) setRedirect  function setRedirect($route_name, array $route_parameters = [], array $options = []) This method will call the setRedirectUrl function inside it. 1) route_parameters - optional argument 2) route_name -  The name of the route name. 3) options -    (optional) An associative array of additional URL options, with the    *   following elements:    *   - 'query': An array of query key/value-pairs (without any URL-encoding)    *...
Post a Comment
Read more

What is Drupal ? What is Content Management System??

Before  Diving into Drupal 8 Learning ,                                                One who must know what is drupal . What is Drupal ? Drupal  is one among the Content Managment System . Then next rising  question is What is   Content Management System  . ?   To explain about Content Mangement System lets start with an example If you want to sell your products in online , you can sell by passing some of the information about your product in web by giving Name of the Product Image of the Product  Price of the Product ....etc As a whole you are describing your content For managing large amount of data like this you need a system for flexibility  and ease of use So you may think like developing a system from scratch to sell a product Ohhhhh !!!!!!!!!!!!!!!!!!!!!!!Nooooooooooooooooo!!!! ...
Post a Comment
Read more