Clearing cache is something that a Drupal developer do frequently. Here are the 4 most popular ways to clear the cache. 1.Install the devel module which adds a cache clear option for administrators. You'll find a devel block to add to a region for quick cache clearing. 2. If you install the admin menu and get a quick menu in the top left for clearing various caches in Drupal.
Drush is a free and open-source software command line and scripting interface for Drupal. It is very popular among Drupal developers. Here is a way to check whether your system has Drush installed and identify its version. Open a terminal, change to your Drupal project folder and execute the following command
If you installed the latest version of drupal9 it will have the following directories. compare to other versions of Drupal, drupal9 does not have a libraries folder
We can use the following command for downloading and enabling module till the version of drupal7 drush dl module_name drush en module_name -y In Drupal 8 and Drupal9 you no longer use Drush. Use composer command instead composer require drupal/module_name After, you will need to enable the module using the Drush command
Steps for Enabling or disabling maintenance mode using Drush 1. Run the following Drush commands to enable maintenance mode and clear drush state:set system.maintenance_mode 1 drush cr 2.Run the following Drush commands to disable maintenance mode and clear the cache:
We can install the latest version of drupal9 using the following command. composer create-project drupal/recommended-project my_site_name_dir This will create a project in 'my_site_name_dir' and automatically execute composer install to download the latest stable version of Drupal and all its dependencies. Your 'my_site_name_dir' will contain files that should be outside of your web root and not accessible by the web server. The web root will be 'my_site_name_dir/web'.
Actually, we can't install an incompatible module with the composer and apply a compatibility patch afterward. However, since issue forks are branches it's possible to install the module using that branch. Under the repositories section where the composer source is listed, we need to add an exclude key for our module that we're trying to install using the issue fork. In the following example trying to install an issue for the homebox module. Complete repositories key look like this now:
We can use loadByProperties method in the \Drupal\Core\Entity\EntityStorageInterface.it will help us to search the file entity by the given file URI: /** @var \Drupal\file\FileInterface $files */ $files = \Drupal::entityTypeManager() ->getStorage('file') ->loadByProperties(['uri' => $uri]); /** @var \Drupal\file\FileInterface|null $file */ $file = reset($files) ?: NULL; In some other cases if you don't know the file URI We can use the below code to get the URI:
Drupal is one of the most secure Web Content Management systems available today and the credit for this goes to the simple fact that there is a dedicated security team that constantly checks the codebase for any vulnerabilities and provides fixes for any vulnerabilities identified. As per the Drupal Security team, security release "windows" are every Wednesday for Drupal contributed projects, and one Wednesday a month (usually the third Wednesday) for Drupal core.
To load node details using its id in Drupal 8 uses the following syntax: $node_details = Node::load($nid); $node_details->field_FIELD_NAME->value; We can load multiple nodes in Drupal 8 using load multiple() function. Note that the parameter should be an array of ids.
In Drupal 8, the usage of database operations such as select, update and delete are slightly changed from Drupal 7. The db_query() is deprecated in Drupal 8. To fetch a field we can use : $query = \Drupal::database()->query('SELECT myfield from my_table where field1 = :value1 AND field2 = :value2', array( ':value1' => $condition1, ':value2' => $condition2, ) ); $data = $query->fetchField(); Now we can checkout the select, update, and delete operations in Drupal 8. For a field selection use,
For one of my project, I have implemented the Redis module in Drupal 8. I have used the following configurations as follows:
Most often we may want to show our custom forms in blocks. Here are the simple steps to accomplish this. In the below code we will create a form called “MymoduleExampleForm” and this form will be placed in a custom block called “MymoduleExampleBlock”. Step 1 – Create a custom module say 'mymodule'. For details on how to create a custom module in Drupal 8 See here Step 2 – Create a php file named MymoduleExampleForm.php in mymodule/src/Form and place the following code.
In Drupal 8 we can load an image using image style in a custom function using the file id of the image. For this first, we have to create an image style by configuration or create a config file for the same (Example below: image.style.sample_image_style.yml). Note that we can generate the below file after creating an image style and export the same from config synchronization in Drupal 8.
While working on a Drupal 8 project we suddenly encountered this error after pushing the site to the development server. This had not occurred in our local machines which caught us off guard. A little debugging on the error log revealed the cause of this Drupal message. If you encounter this error unexpectedly, the first thing you should do is to check the error log of the server which is what we did. However, if you do not have access to the error log it and if the issue is only occurring in a particular server after deployment then it is most likely to be a DB issue.
This article covers, how to send email programmatically in your Drupal 8 site. There are two main steps to send an email using Drupal 8. First we need to implement hook_mail() to define email templates and the second step is to use the mail manager to send emails using these templates. Let's see an example for sending an email from the custom module, also the following name spaces.
Security Audits play a crucial role in an organization’s ongoing effort to address security concerns. After identifying any potential security issues, remedial steps need to adopt; in fact, a Security audit is one of the first steps that need to be taken. No organization in its right mind would want to leave its websites vulnerable to hacking, and conducting a security audit is the best way to tackle security issues.
Drupal offers a variety of ways to implement solutions when it comes to custom theming and it has been abused often due to the very same reason. Choosing the right way is what Drupal developers find tricky. If it is not done right, it is quite likely that you 'Awesome Drupal Website' would turn into a code-monster soon. This can even make maintenance difficult. Hope this 'tiny bit of' information could help you through it.
Drupal has grown to be recognized as the most powerful and practical modular framework used by numerous website developers and business owners. The CMS community has adapted to the versatile and extremely functional structure of Drupal very quickly and Drupal modules have risen high on the must-have charts of web developers.
In my project I have a requirement to display the error message of webform submissions in a popup window. Webform is a module for creating simple or multi-step forms in Drupal in an easy way. To display the webform in popup is very hard to me. Webform Ajax module helps to meet this requirement. Its is very useful module for single or multi-step forms with pagination's in a popup box.