2. Basic and Advanced Search - digitalutsc/islandora_lite_docs GitHub Wiki

Although Drupal’s Search API permits multiple back-ends, we use Solr and Drupal’s Apache Solr project, as well as the Advanced Search module, to offer a default, configurable, simple search as well as an advanced Boolean search.

Module to install: https://github.com/digitalutsc/advanced_search/tree/dsu_utsc

We have extended the Islandora Advanced Search module to work with Drupal/Solr instances of Islandora and have added an "all" field that supports a DisMax search. This enables us to have a "simple search" box for google-style searching across a site.

• Go to Structure > Block Layout > (any region) > Place block
• Look for Search block (screenshot below)

• Set config for the Simple Search block (screenshot below)

Note: For this be effective on search, field need to be set to String instead of Fulltext

• Define the following field type in schema_extra_types.xml.
  • In ISLE-DC, it's located at /opt/solr/server/solr/ISLANDORA/conf
  • In Islandora Playbook, it's located at /var/solr/data/ISLANDORA/conf

<fieldType name="string_case_insensitive" class="solr.TextField" positionIncrementGap="100">
  <analyzer type="index">
    <tokenizer class="solr.StandardTokenizerFactory"/>
    <filter class="solr.LowerCaseFilterFactory"/>
  </analyzer>
  <analyzer type="query">
    <tokenizer class="solr.StandardTokenizerFactory"/>
    <filter class="solr.LowerCaseFilterFactory"/>
  </analyzer>
</fieldType>

• Add the following copy fields schema_extra_fields.xml

<dynamicField name="tm_lowercase_*" type="string_case_insensitive" indexed="true" stored="true" multiValued="true"/>                                           
<copyField source="ss_*" dest="tm_lowercase_*" maxChars="30000" />                                                                                             
<copyField source="sm_*" dest="tm_lowercase_*" maxChars="30000" />     

• Restart the Solr server

• The Extended DisMax Query Parser
  • Fuzzy Searches
  • Wildcard Searches
  • Case-insensitive keyword searching

• Go to /admin/config/search/advanced, check Enable Lucene Search. checkbox

• The Keyword option will be added to Advanced Search form.

This view is the Leaflet map representation(https://leafletjs.com/) of digital objects which have coordinates in their metadata. The view uses Solr Indexer, and it can be searchable and works with facets.

Use:

• Geolocation module (https://www.drupal.org/project/geolocation)
• Geolocation_leaflet (Geolocation's submodule)

This view is the timeline representation(https://timeline.knightlab.com/) of digital objects which have coordinates in their metadata. The view uses Solr Indexer, and it can be searchable and works with facets.

Use:

• Views TimelineJS integration (https://www.drupal.org/project/views_timelinejs)

See issue: https://github.com/digitalutsc/islandora_lite_solr_search/issues/3

Islandora Lite uses Ableplayer to provide accessible video/audio viewers, and to handle close caption and transcription. It stores the webvtt file via a custom media called Able Player Caption. To index the vtt files, we are using the file_extractor module. The module is configured to use the Search API Solr Extractor. It will add a computed field called "File extractor: extracted file". Navigate to that field in the search api field configurations, and add that to the index.