drupal8

Problem

I need to override the email validation service so that we can use a custom validation .

Solution

There are a few step to follow for this solution. Find the service that provides the validation service

1. Find the service and the file 
   • There are a couple of ways to find the service
     1. GOTO https://api.drupal.org/api/drupal/services and just serach for it
     2. Use Drupal console 

        drupal debug:container | grep email

Problem

I want to change the title and controller of the '/user/reset/{uid}/{timestamp}/{hash}'

Problem

I want to add a link to my content page that will dynamically change/replace content on the page using AJAX.

Solution

The solution here is add a route and to write a call back that will respond accordingly. The only difference here is 

• The link is not a a normal link but a link that will load using a AJAX call
• The Response here is also not normal it will be a  AjaxResponse

So lets see how we can do this

The core_version_requirement key specifies what versions of Drupal that the module is compatible with.

 

name: Example
type: module
core: 8.x
core_version_requirement: ^8 || ^9

 

The above example  says that the module is compatible with Drupal 9 and Drupal 9. Notice that the core key is still compulsory here

The chnage

After Drupal 8.8.0 we will not need the core key anymore.

Problem:

I want to use the address field in a custom form which can be fulfilled with the below code

$form['address'] = [
  '#type' => 'address',
  '#required' => TRUE,
];

This would print the following fields

Now what if we want to hide some the above fields

Problem:

I need to place a block added by another module on my page. I cannot add it by placing the block on a region. Because there is specific placement on the content region itself

Solution:

Add the block programatically to the page. We can get the block content programatically on a hook_preprocess function and add it to the $variables to print on the twig template

Problem:

I need to redirect a form to a specific URL on submit

Solution

1. Add a custom submit on hook_form_alter();

   • Use either of the lines below

Problem: I had the need to re-write some view fields programatically

Solution: 

1. first use template_preprocess_views_view_fields hook

   ex:- yourtheme_preprocess_views_view_fields(&$variables)

Problem: There is no specific function in Drupal 8 which we can use to get all blocks assigned to a region. We used to have a function called block_get_blocks_by_region in Drupal 7 to do this

Solution : Although we don't have a specific function we have the tools in Drupal 8 s Object oriented hierarchy to do the same. Here is the code

 

function my_module_get_blocks_by_region($region) {

  $blocks = \Drupal::entityTypeManager()

    ->getStorage('block')->loadByProperties([

Problem

I cam across an error when synching configurations from my Drupal 8 local environment to my development environment. The error is as folllows

Error: configuration THEMENAME.settings depends on the THEMENAME extension that will not be installed after import.

Not entirely sure if this is a bug in D8 core but the root cause was that it when exporting the configurations from my local environment the "Configuration manager" module in D8 core was picking up an odd looking configuration.