Drupal Solr: How to add custom field in solr fields.

This time I am going with Drupal Solr. You can know more about what is solr and how it is suitable for your web site.

Problem: How to add custom field(Article Ownership Text) in solr search index.

Requirement:

1. Drupal 7.x
2. Search API Solr Search
3. Solr server should enabled and running.

Solution:

You can see in above image I have created the Article Index and in field list it shows all fields which is related to Article content type. Now I want my custom code field "show legal ownership text" for every article.

Step 1: Create on custom module solr_field and in solr_field.module file implement hook_entity_property_info_alter.

/**
 * Implements hook_entity_property_info_alter().
 */
function solr_field_entity_property_info_alter(&$info) {
    $info['node']['properties']['legal_text'] = array(
        'type' => 'text',
        'label' => t('Legal Text'),
        'sanitized' => TRUE,
        'getter callback' => 'get_legal_text_for_article',
    );
}

/**
 * Getter callback for get_legal_text_for_article
 */
function get_legal_text_for_article($entity, $options, $name, $entity_type, &$item) {
    if ($entity_type == 'node') {
        $legal_text = "This article is own by ... you should not use this to commercial use.";
        return $legal_text;
    }
}
       
 

Step 2: Now enable module, clear the cache and got to "admin/config/search/search_api/index/article/fields", now you can see in field list our new custom field is there.

Step 3: Select this field and save configuration and that sit.