Building Custom Solr Query

Building Custom Solr Query

Solr search has great performance, is suitable even for use on large commercial websites and supports facets and multi-index searches. What if we want to build your own query or get all indexed nodes programmatically?

Yes, building the custom query for Solr content will solve the problem.

Benefits of custom Solr Query

  1. Reduces load time.
  2. Custom filters.

1. Initialize solr api query using your index name

// To get index field value
$public_index = “Name of your Index”
$index = search_api_index_load($public_index);
$query = new SearchApiQuery($index);

2. Building filter, you can add multiple filters in your query

// Build a filter.
$node_filter = $query->createFilter('AND');
$node_filter->condition('type', 'content_type', '=');
$node_filter->condition('status', NODE_PUBLISHED, '=');

3. Adding filters to query

// Added filter in query.

4. Fetch results of custom query

// Fetch results.
$results = $query->execute()['results'];
$arr_nodes = array_keys(return $arr_node$results);
Hope this helped you to get most out of the system, feel free to share your reviews and Pick the best answer for your requirements.

Original Post: Building Custom Solr Query


Introduction To Bootstrap Paragraph Drupal 8

Bootstrap Paragraph Drupal 8


Paragraphs are one of the modules that make site builder and end users more powerful. Paragraph module does this by replacing one big WYSIWYG with predefined paragraph types. Paragraph module utilizes entity reference field to reference paragraph types. Paragraphs are basically entities so users get control over fields and theming of the paragraph.


Bootstrap is sleek, intuitive, and powerful mobile first front-end framework for faster and easier web development. Bootstrap has become one of the most popular front-end frameworks and open source projects in the world.

A combination of these two is “Bootstrap Paragraph” module.

“The Bootstrap Paragraphs module provides a suite of content and layout Paragraph bundles made with the Bootstrap front-end framework.”

Using bootstrap paragraph module, it is very easy to create features like an accordion, modals, tabs, multi-column layouts, and many more things.

The module has multiple dependencies including paragraphs, Entity reference revisionscontact formatter to name a few. The module also needs Bootstrap framework’s js and CSS added in site theme. Installing this module via composer could be beneficial.

Module installation follows a standard process. The module comes with predefined paragraph bundles which can be accessed from /admin/structure/paragraphs_type. These paragraph bundles are divided into 2 main categories:

Content bundles

  • Simple HTML
  • Image
  • Blank
  • Contact Form
  • Drupal Block
  • View

Layout bundles

  • Accordion
  • Carousel
  • Columns (Even, up to 6)
  • Columns (3 Uneven)
  • Columns (2 Uneven)
  • Modal
  • Tabs

Each paragraph type comes with 2 options:

Width and background color

Bootstrap Paragraph Drupal 8

Over 50 background colors are already defined. Empty background classes are also available to customize based on your theme. These classes are :

  • .paragraph–color–primary
  • .paragraph–color–secondary
  • .paragraph–color–success
  • .paragraph–color–info
  • .paragraph–color–warning
  • .paragraph–color–danger

Predefined width options include following:

  • Tiny – col-4, offset-4
  • Narrow – col-6, offset-3
  • Medium – col-8, offset-2
  • Wide – col-10, offset-1
  • Full – col-12

To use these paragraph bundles, an entity reference field referencing to paragraph needs to be added to a content type. This field can have unlimited value to allow site builders to add as many paragraphs as they want. Once set you can start creating content. With this module, you can place a piece of content in your own structured page.

Additional Features

  • Paragraphs and fields are saved in the database. This means that whatever changes are made in them are also in the database.
  • Theme CSS gets precedence over module CSS. You can copy template files in theme from a module and overwrite CSS as you desire.
  • The module can be uninstalled without losing paragraphs and CSS. You need to move all templates and CSS to your theme. Remove “attach_library” calls from template files and call CSS from theme’s library.
  • You can use this module to create reusable paragraph bundles via a module.

To summarize, Bootstrap paragraph module is a suite of Paragraph bundles made with the Bootstrap framework. With this module, you can easily position chunks of content (Paragraph bundles) within a structured layout of your own design.

Hope this blog helped you and explore more about Paragraphs also need assistance for Drupal 8 Services then get in touch with us Feel free to share feedback.

Original Post: Introduction to Bootstrap Paragraph Drupal 8

Guidelines for Updating Node Fields Without node_save() In Drupal

Guidelines for Updating Node Fields Without node_save() In Drupal

Customization is nowadays common on Drupal site. Here you may need to save node programmatically at any time. For saving node programmatically we use node_save() hook which will save the whole node though we want to update only one field.

Drupal function field_attach_update() will replace node_save() in some way. It will update only that field which you want to update.

Benefits of field_attach_update()

  1. Reduces load time.
  2. Not update CCK fields.
  3. Easy to use.

Below is the code to use field_attach_update() hook.

// $arr_nids is array of node id that you want to update
$arr_nodes = node_load_multiple($arr_nids);
foreach ($arr_nodes as $key => $node) {
$node->field_fieldname1[LANGUAGE_NONE][0]['value'] = 'field1 value';
$node->field_fieldname2[LANGUAGE_NONE][0]['value'] = 'field2 value';
$node->field_fieldname3[LANGUAGE_NONE][0]['value'] = 'field3 value';

field_attach_update('node', $node);

entity_get_controller(‘node’)->resetCache(array($node->nid)) is used to clear cache for the entity.

For example:

Values before using field_attach_update():

Guidelines for Updating Node Fields Without node_save() In Drupal

Update Fields using field_attach_update():

$nid = '29';
$node = node_load($nid);
$node->field_fname[LANGUAGE_NONE][0]['value'] = 'Johnny1';
$node->field_lname[LANGUAGE_NONE][0]['value'] = 'Harper1';
$node->field_address[LANGUAGE_NONE][0]['value'] = '405, Silicon Tower, Above Freezland Restaurant, Law Garden, Off C.G. road, Ahmedabad, Gujarat - 380009 India.';

field_attach_update('node', $node);

Values after using field_attach_update():

Guidelines for Updating Node Fields Without node_save() In Drupal

Hope this helped you to get most out of the system. Need more assistance for Drupal Development Services then get in touch with us. Feel free to share your reviews and pick the best answer for your requirements. #WeDrupalEveryday

Create Custom Multistep Form Using Ajax

Multistep Form Using Ajax
Don’t want long forms on your website? Convert it into multi-step form, as it is more convenient and provides step by

step procedure to follow by user. This blog will provide a way to create of multi step form using ajax. 1. Create a menu item using hook_menu()

/** * Implementation of hook_menu(). */ function custom_menu() { $menu[‘multistep_form’] = array ( ‘title’ => ‘Multistep Form’, ‘description’ => ‘To create multistep form’, ‘page callback’ => ‘drupal_get_form’, ‘page arguments’ => array(‘ajax_multistep_form’), ‘access callback’ => TRUE, ); return $menu; }

  1. Define a callback functionIt includes stepwise fields. It contains fieldset for each step with their respective fields. Then It will includes buttons for each step.

We have called ajax_multistep_form_ajax_callback function it returns the entire form each time the function is called. Added a wrapper div “ajax_multistep_form’” to update the form using AJAX.

$form[‘buttons’][‘next’] = array ( ‘#type’ => ‘submit’, ‘#value’ => t(‘Next’), ‘#ajax’ => array ( ‘wrapper’ => ‘ajax_multistep_form’, ‘callback’ => ‘ajax_multistep_form_ajax_callback’, ), );



function ajax_multistep_form($form, &$form_state) {   // If $form_state[‘step’] is not set then set default to 1 $form_state[‘step’] = isset($form_state[‘step’]) ? $form_state[‘step’] : 1; // Add a wrapper div to update the form using AJAX $form[‘#prefix’] = ‘

‘; $form[‘#suffix’] = ‘

‘;   switch($form_state[‘step’]) { // Step 1 case 1: $fname_default_value = $lname_default_value = ”; if(isset($form_state[‘values’][‘step_1’])) { $fname_default_value = $form_state[‘values’][‘step_1’][‘fname’]; $lname_default_value = $form_state[‘values’][‘step_1’][‘lname’]; } elseif(isset($form_state[‘storage’][‘step_1’])) { $fname_default_value = $form_state[‘storage’][‘step_1’][‘fname’]; $lname_default_value = $form_state[‘storage’][‘step_1’][‘lname’]; }   $form[‘step_1’] = array( ‘#type’ => ‘fieldset’, ‘#title’ => t(”), ‘#collapsible’ => false, ‘#collapsed’ => false, ); $form[‘step_1’][‘fname’] = array( ‘#type’=>’textfield’, ‘#required’ => true, ‘#title’=>t(‘First Name’), ‘#default_value’ => $fname_default_value, ); $form[‘step_1’][‘lname’] = array( ‘#type’=>’textfield’, ‘#required’ => true, ‘#title’=>t(‘Last name’), ‘#default_value’ => $lname_default_value, ); break; // Step 2 case 2: $phone_default_value = ”; if(isset($form_state[‘values’][‘step_2’])) { $phone_default_value = $form_state[‘values’][‘step_2’][‘phone’]; } elseif(isset($form_state[‘storage’][‘step_2’])) { $phone_default_value = $form_state[‘storage’][‘step_2’][‘phone’]; }   $form[‘step_2’] = array( ‘#type’ => ‘fieldset’, ‘#title’ => t(”), ‘#collapsible’ => false, ‘#collapsed’ => false, ); $form[‘step_2’][‘phone’] = array( ‘#type’=>’textfield’, ‘#required’ => true, ‘#title’=>t(‘Phone Number’), ‘#default_value’ => $phone_default_value, ); break; // Step 3 case 3: $city_default_value = $city_default_value = ”; if(isset($form_state[‘values’][‘step_3’])) { $street_default_value = $form_state[‘values’][‘step_3’][‘street’]; $city_default_value = $form_state[‘values’][‘step_3’][‘city’]; } elseif(isset($form_state[‘storage’][‘step_3’])) { $street_default_value = $form_state[‘storage’][‘step_3’][‘street’]; $city_default_value = $form_state[‘storage’][‘step_3’][‘city’]; }   $form[‘step_3’] = array( ‘#type’ => ‘fieldset’, ‘#title’ => t(”), ‘#collapsible’ => false, ‘#collapsed’ => false, ); $form[‘step_3’][‘street’] = array( ‘#type’=>’textfield’, ‘#required’ => true, ‘#title’=>t(‘Street Address’), ‘#default_value’ => $street_default_value, );   $form[‘step_3’][‘city’] = array( ‘#type’=>’textfield’, ‘#required’ => true, ‘#title’=>t(‘City’), ‘#default_value’ => $city_default_value, );   }     // Form Buttons $form[‘buttons’] = array ( ‘#type’ => ‘container’, ); // If we are on step 1, we do not want a back button if($form_state[‘step’] !== 1) { $form[‘buttons’][‘back’] = array ( ‘#type’ => ‘submit’, ‘#value’ => t(‘Back’), ‘#limit_validation_errors’ => array(), ‘#submit’ => array(‘ajax_multistep_form_back_submit’), ‘#ajax’ => array ( ‘wrapper’ => ‘ajax_multistep_form’, ‘callback’ => ‘ajax_multistep_form_ajax_callback’, ), ); }   if($form_state[‘step’] !== 3) { $form[‘buttons’][‘next’] = array ( ‘#type’ => ‘submit’, ‘#value’ => t(‘Next’), ‘#ajax’ => array ( ‘wrapper’ => ‘ajax_multistep_form’, ‘callback’ => ‘ajax_multistep_form_ajax_callback’, ), ); } else { $form[‘buttons’][‘submit’] = array ( ‘#type’ => ‘submit’, ‘#value’ => t(‘Submit’), ‘#ajax’ => array ( ‘wrapper’ => ‘ajax_multistep_form’, ‘callback’ => ‘ajax_multistep_form_ajax_callback’, ), ); } return $form; }

  1. Add validation for your fieldsIt will add validation for phone number field in step 2. You can add validations for other steps too.

function ajax_multistep_form_validate($form, &$form_state) { switch($form_state[‘step’]) { case “2”: $contact_phone = $form_state[‘values’][‘phone’]; $contact_errror = ‘”‘.$contact_phone .'”‘ . ‘ is not a valid North American phone number. Please enter a valid ten-digit phone number with optional extension in this format 123 456 7891.’; if (!preg_match(‘/([0-9]{3}?\s?[0-9]{3}?\s?[0-9]{4})/’, $contact_phone)) { form_set_error(‘phone’, $contact_errror); } break; } }

  1. Final submit function

function ajax_multistep_form_submit($form, &$form_state) {   $step = $form_state[‘step’];   //$form_state[‘storage’][‘step_’ . $step] = $form_state[‘step’];   if($form_state[‘step’] == 1) { $form_state[‘storage’][‘step_’ . $step][‘fname’] = $form_state[‘values’][‘fname’]; $form_state[‘storage’][‘step_’ . $step][‘lname’] = $form_state[‘values’][‘lname’];   } if($form_state[‘step’] == 2) { $form_state[‘storage’][‘step_’ . $step][‘phone’] = $form_state[‘values’][‘phone’]; }   if(isset($form_state[‘values’][‘next’]) && $form_state[‘values’][‘op’] == $form_state[‘values’][‘next’]) { // Goto next step $form_state[‘step’]++; }   if(isset($form_state[‘values’][‘back’]) && $form_state[‘values’][‘op’] == $form_state[‘values’][‘back’]) { // Goto next step $form_state[‘step’]–; } // Check if it is last step elseif(isset($form_state[‘values’][‘submit’]) && $form_state[‘values’][‘op’] == $form_state[‘values’][‘submit’]) {   $form_state[‘storage’][‘step_’ . $step][‘street’] = $form_state[‘values’][‘street’]; $form_state[‘storage’][‘step_’ . $step][‘city’] = $form_state[‘values’][‘city’];   $items = array($form_state[‘storage’][‘step_1’][‘fname’], $form_state[‘storage’][‘step_1’][‘lname’], $form_state[‘storage’][‘step_2’][‘phone’], $form_state[‘storage’][‘step_3’][‘street’], $form_state[‘storage’][‘step_3’][‘city’]); drupal_set_message(t(‘You submitted the following values:!values’, array(‘!values’ => theme(‘item_list’, array(‘items’ => $items)))));   $form_state[‘step’] = 1; $form_state[‘storage’] = array(); } $form_state[‘rebuild’] = TRUE; }

  1. Ajax callback function for every buttons in our form

function ajax_multistep_form_ajax_callback($form, &$form_state) { return $form; }

This it just an example, you store all steps value in “$form_state[‘storage’]” and use it.

$step = $form_state[‘step’]; $form_state[‘storage’][‘step_’ . $step][‘values’] = $form_state[‘values’];

Hope this helped you to get most out of the system. Feel free to share your reviews or need assistance regarding our

CakePHP development services then get in touch with us. #WeDrupalEveryday. Pick the best answer for your requirements.

Features & Use Of Display Modes In Drupal 8

Display modes are one of the core functionalities of Drupal 8. They are easy to create and provides great flexibility in terms of theming at entity viewing and editing level. Display modes are available for content, comment, contact messages, custom blocks, taxonomy terms, users. They are also available to views adding more power to views.

Display modes are located at Admin -> Structure -> Display modes -> View mode.

Two types of display modes are available: “view modes” and “form modes.”  Both these are an example of configuration entities.

View modes allow site builder to request a field to be rendered in a certain way. For example, we can have an article that has doctors field has entity reference. An article full mode display, we can request few details of doctor to be displayed. We can create a new display mode (“Doctor details”) to do so. On Doctor’s full view, we can include a brief summary of articles associated with them.  (In detail:

To create View mode 

Navigate to Admin -> Structure -> Display modes -> View mode

  1. Click on “Add view mode” to add new view mode

  2. Created view mode is available on content types. Navigate to manage display of the content type and enable view mode.

    Manage display console test.png

Once enabled, this mode can be used on referenced field.

Once view modes are enabled, we can theme it as per requirements. To get template suggestions, you need to turn on debug property from services.yml.

You can find theme suggestion in inspect element.

Display modes can also be used based on conditions and we can switch mode based on conditions.

function hook_entity_view_mode_alter(&$view_mode, Drupal\Core\Entity\EntityInterface $entity, $context) {
  // For nodes, change the view mode when it is teaser.
  if ($entity->getEntityTypeId() == 'node' && $view_mode == 'teaser') {
    $view_mode = 'my_custom_view_mode';
Hope this helped you to understand Display Modes in Drupal 8, Feel free to drop us a line for any Drupal 8 related work/queries/tasks, or Need any assistance regarding Drupal 8 Web design & Development.
Always ready to help 🙂

Everything You Need To Know About Drupal Mail System

Drupal Mail System

This blog is all about Drupal Mail system. Email sending in Drupal is entirely straightforward. Essentially you just need to manage two stages to send an email to somebody:

In Drupal to sends an email we need to take care of two things:

  • Declare all the required properties (subject, body, headers, etc) under hook_mail().
  • Call drupal_mail() with the argument for actually sending the email.

However, in the situation like greater and complex site, the above strides won’t be sufficient. In any case, Drupal gives us the Flexibility to redo email sending process, before that it’s important to know how stuff functions in the background first, with the help of Drupal you can easily generate custom pdf using the print module. In this blog, I’ll demonstrate to you how you can redo and extend the Drupal mail framework to satisfy your necessities.

The Email Sending Process

While sending an email drupal_mail() function uses system class for sending an email. Each mail framework needs to actualize MailSystemInterface class to define its own mail sending conduct.

MailsystemInterface class utilizes two strategies:

  • format()
  • mail()

The Mail System Module

Mail related settings can be set through Configuration > System > Mail System.

The mail system variable contains two things:

  • default-system => DefaultMailSystem
  • mailsystem_theme => current.

These key-value pairs are the settings you can adjust under the “Mail System Settings” fieldset.


The default-system email key describes which mail system class will be used by default for all outgoing emails.

If you don’t modify the site-wide mail system class then this one will be used by drupal_mail() by default.

The mailsystem_theme defines which theme will be used to render emails. Let’s say you are using Mime Mail which

uses a specific template file for it’s emails. The Mail System module checks every theme registry entry for a specific

“mail theme” key/property and if it exists in a particular entry then the specified mailsystem_theme value will be used

to search for more specific template files when the theme registry entry related theme hook will be called.

New Class

If you have two or more different mail system classes available in your system provided by different modules.

If you want to use any custom mail class which would use format() method of one mail system class and mail()

method from another class, so here you can use New Class which allows combining two different mail system classes.

New Setting

The Mail System module permits you to effortlessly add new email keys to the mail_system variable by choosing a

module and a particular email key from its hook_mail() execution.


Afterward added new email key to the mail_system variable you will ready to choose mail system class for it.

You will have the capacity to see it under all inclusive default MailSystemInterface class settings.

At the point when drupal_mail is called with your demo_custom _mail email key, then the in a roundabout way utilized

drupal_mail_system() function checks if this email_key exists in mail_system variable. It finds the related key then the

related mail system class will be utilized rather than default class.

Hope this helped you to get most out of the system. Feel free to share your reviews and need assistance regarding

Drupal Development Services. #WeDrupalEveryday

Pick the best answer for your requirements.

Tips To Upgrade Commerce Coupon Module In Drupal

Commerce Coupon Module

Commerce coupon module adds Commerce coupon facility to Drupal commerce.

Commerce coupon 7.x-2.x is recommended version. This version depends on Commerce Discount.

Commerce coupon 7.x-2.x has many architectural improvements and new features which include integration with commerce discount, multiple discounts per coupon, integration with inline conditions.

There are no fixed amount coupons or percentage coupons with this version. Instead, we use discounts and use them with coupons.

Upgrading from Commerce coupon 7.x-1.x to Commerce coupon 7.x-2.x is not directly supported. It is two step process.

As per module page on, “Commerce Coupon 7.x-2.x-beta2 has an upgrade path from 1.x to 2.x. It works for upgrading relatively simple coupon 1.x sites; mileage may vary if you have a lot of custom coupon functionality though.”

So in order to upgrade to latest commerce coupon, we first need to upgrade to beta2 and then upgrade to latest version.

Below are the steps to upgrade normal commerce coupon setup without any additional customization.

  • First things first, take a backup.
  • Upgrade to Commerce coupon 7.x-2.x-beta3 following standard upgrade process. You will need to add commerce discounts and inline conditions modules installed before upgrading commerce coupon.
  • Once updates are run, you will see your old coupons converted into new coupon and discount systems. Discounts are created for previous fixed and percentage coupons.
  • Upgrade to latest commerce coupon version following standard upgrade process.
  • Make sure to give permission to required user roles to “Redeem coupon”.

This process assumes that there is no custom coupon functionality is added and no additional modules are used along-w

ith commerce coupon. The Success of upgrade process largely depends on how coupon module is used and customization is done on it.

Below are the steps to upgrade commerce coupon with Commerce Coupon by product reference module installed.

  • Take a backup.
  • Delete product reference fields from coupons.
  • Disable Commerce Coupon by product reference module.
  • Upgrade commerce coupon as outlined in steps 2,3 and 4 in upgrade normal commerce coupon.
  • Edit required discounts and add products.

This makes sure that this discount applies to specific products only.

  • Give appropriate user roles permission to “Redeem coupon”.

Since inline conditions are also installed, you can create coupons while creating discounts.

You can also consider adding Commerce discount Extra module which provides various common discount condition And offers types.

Need more assistance regarding Drupal Commerce Module Development Contact us now and Feel free to share your views/feedback for any further queries.