From 0e95c0e85d4524dfdda8e1277ea245566a27e712 Mon Sep 17 00:00:00 2001
From: Mohamed El-Sawy <melsawy.be7eri@gmail.com>
Date: Tue, 11 Feb 2025 07:10:32 +0200
Subject: [PATCH] CV2-6038 refactor has claim search filter into has article
 filter (#2205)

* CV2-6038: include explainer_title to has_article filter

* CV2-6038: set value with nil instead of remove field from ES doc

* CV2-6038: fix tests

* CV2-6038: search by explainer_title field

* CV2-6038: add rake task to migrate exisintg explainers

* CV2-6038: use a single query for explainer titles

* CV2-6038: apply PR comments
---
 app/lib/check_elastic_search.rb               | 26 ++-------
 app/models/annotations/embed.rb               | 22 --------
 app/models/claim_description.rb               | 26 ++++-----
 .../concerns/project_media_cached_fields.rb   |  1 +
 app/models/concerns/project_media_getters.rb  |  6 ++
 app/models/explainer_item.rb                  | 19 +++++++
 app/repositories/media_search.rb              |  2 +
 app/workers/elastic_search_worker.rb          |  1 -
 ...9_add_mapping_for_explainer_title_field.rb | 13 +++++
 lib/check_search.rb                           | 26 +++++----
 ...add_mapping_for_explainer_title_field.rake | 21 +++++++
 test/controllers/elastic_search_7_test.rb     | 20 +++----
 test/controllers/elastic_search_9_test.rb     | 56 ++++++++++++++++---
 13 files changed, 151 insertions(+), 88 deletions(-)
 create mode 100644 db/migrate/20250205224319_add_mapping_for_explainer_title_field.rb
 create mode 100644 lib/tasks/migrate/20250205224319_add_mapping_for_explainer_title_field.rake

diff --git a/app/lib/check_elastic_search.rb b/app/lib/check_elastic_search.rb
index b43a44ed9c..7a6fd94bd6 100644
--- a/app/lib/check_elastic_search.rb
+++ b/app/lib/check_elastic_search.rb
@@ -37,13 +37,6 @@ def update_elasticsearch_doc(keys, data = {}, pm_id = nil, skip_get_data = false
     ElasticSearchWorker.perform_in(1.second, YAML::dump(model), YAML::dump(options), 'update_doc')
   end
 
-  def remove_fields_from_elasticsearch_doc(keys, pm_id)
-    return if self.disable_es_callbacks || RequestStore.store[:disable_es_callbacks]
-    options = { keys: keys, pm_id: pm_id }
-    model = { klass: self.class.name, id: self.id }
-    ElasticSearchWorker.perform_in(1.second, YAML::dump(model), YAML::dump(options), 'remove_fields')
-  end
-
   def update_recent_activity(obj)
     # update `updated_at` date for both PG & ES
     updated_at = Time.now
@@ -56,13 +49,11 @@ def update_elasticsearch_doc_bg(options)
     data = get_elasticsearch_data(options[:data], options[:skip_get_data])
     fields = {}
     options[:keys].each do |k|
-      unless data[k].nil?
-        if data[k].class.to_s == 'Hash'
-          value = get_fresh_value(data[k].with_indifferent_access)
-          fields[k] = value unless value.nil?
-        else
-          fields[k] = data[k]
-        end
+      if data[k].class.to_s == 'Hash'
+        value = get_fresh_value(data[k].with_indifferent_access)
+        fields[k] = value
+      else
+        fields[k] = data[k]
       end
     end
     if fields.count
@@ -72,13 +63,6 @@ def update_elasticsearch_doc_bg(options)
     end
   end
 
-  def remove_fields_from_elasticsearch_doc_bg(options)
-    options[:keys].each do |k|
-      source = "ctx._source.remove('#{k}')"
-      $repository.client.update index: CheckElasticSearchModel.get_index_alias, id: options[:doc_id], body: { script: { source: source } }
-    end
-  end
-
   # Get a fresh data based on data(Hash)
   def get_fresh_value(data)
     value = data['default']
diff --git a/app/models/annotations/embed.rb b/app/models/annotations/embed.rb
index 485fcf119a..90682701f4 100644
--- a/app/models/annotations/embed.rb
+++ b/app/models/annotations/embed.rb
@@ -5,8 +5,6 @@ class Embed < Dynamic
 end
 
 Dynamic.class_eval do
-  after_commit :update_elasticsearch_metadata, on: [:create, :update], if: proc { |d| ['metadata', 'verification_status'].include?(d.annotation_type) }
-
   def title=(title)
     self.set_metadata_field('title', title)
   end
@@ -36,26 +34,6 @@ def get_metadata_field(field)
     data[field.to_s]
   end
 
-  def update_elasticsearch_metadata
-    unless self.annotated.nil?
-      keys = %w(title description)
-      if self.annotated_type == 'ProjectMedia'
-        self.update_es_metadata_pm_annotation(keys, self.annotated)
-      elsif self.annotated_type == 'Media' && self.annotated.type == 'Link'
-        self.annotated.project_medias.each do |pm|
-          m = pm.get_annotations('metadata').last
-          self.update_elasticsearch_doc(keys, { 'title' => pm.title, 'description' => pm.description }, pm.id) if m.nil?
-        end
-      end
-    end
-  end
-
-  def update_es_metadata_pm_annotation(keys, pm)
-    data = {}
-    keys.each { |k| data[k] = self.send(k) }
-    self.update_elasticsearch_doc(keys, data, pm.id)
-  end
-
   def metadata_for_registration_account(data)
     return nil unless self.annotation_type == 'metadata'
     unless data.nil?
diff --git a/app/models/claim_description.rb b/app/models/claim_description.rb
index cd9352ea83..08abeffbd4 100644
--- a/app/models/claim_description.rb
+++ b/app/models/claim_description.rb
@@ -36,12 +36,14 @@ def text_fields
 
   def article_elasticsearch_data(action = 'create_or_update')
     return if self.project_media_id.nil? || self.disable_es_callbacks || RequestStore.store[:disable_es_callbacks]
-    if action == 'destroy'
-      self.remove_fields_from_elasticsearch_doc(['claim_description_content', 'claim_description_context'], self.project_media_id)
-    else
-      data = { 'claim_description_content' => self.description, 'claim_description_context' => self.context }
-      self.index_in_elasticsearch(self.project_media_id, data)
-    end
+    data = action == 'destroy' ? {
+      'claim_description_content' => nil,
+      'claim_description_context' => nil
+    } : {
+      'claim_description_content' => self.description,
+      'claim_description_context' => self.context
+    }
+    self.index_in_elasticsearch(self.project_media_id, data)
   end
 
   def project_media_was
@@ -90,13 +92,11 @@ def update_report
         fact_check.save!
       end
       # update ES
-      # Remove claim_description fields
-      self.remove_fields_from_elasticsearch_doc(['claim_description_content', 'claim_description_context'], pm.id)
+      # clear claim_description fields
+      data = { 'claim_description_content' => nil, 'claim_description_context' => nil }
       # clear fact-check values
-      unless self.fact_check.nil?
-        data = { 'fact_check_title' => '', 'fact_check_summary' => '', 'fact_check_url' => '', 'fact_check_languages' => [] }
-        self.fact_check.index_in_elasticsearch(pm.id, data)
-      end
+      data.merge!({ 'fact_check_title' => '', 'fact_check_summary' => '', 'fact_check_url' => '', 'fact_check_languages' => [] }) unless self.fact_check.nil?
+      self.index_in_elasticsearch(pm.id, data)
     end
   end
 
@@ -128,7 +128,7 @@ def migrate_claim_and_fact_check_logs
 
   def log_relevant_article_results
     fc = self.fact_check
-    self.project_media.delay.log_relevant_results(fc.class.name, fc.id, User.current&.id, self.class.actor_session_id)
+    self.project_media.delay.log_relevant_results(fc.class.name, fc.id, User.current&.id, self.class.actor_session_id) unless fc.nil?
   end
 
   def cant_apply_article_to_item_if_article_is_in_the_trash
diff --git a/app/models/concerns/project_media_cached_fields.rb b/app/models/concerns/project_media_cached_fields.rb
index 93acdafee6..29e06268f4 100644
--- a/app/models/concerns/project_media_cached_fields.rb
+++ b/app/models/concerns/project_media_cached_fields.rb
@@ -214,6 +214,7 @@ def title_or_description_update
       update_on: FACT_CHECK_EVENTS
 
     cached_field :description,
+      update_es: true,
       recalculate: :recalculate_description,
       update_on: title_or_description_update
 
diff --git a/app/models/concerns/project_media_getters.rb b/app/models/concerns/project_media_getters.rb
index 0ce240c337..d775a8ea23 100644
--- a/app/models/concerns/project_media_getters.rb
+++ b/app/models/concerns/project_media_getters.rb
@@ -213,4 +213,10 @@ def team_avatar
   def fact_check
     self.claim_description&.fact_check
   end
+
+  def explainers_titles
+    # Get the title for all explainer assigned to the item
+    titles = Explainer.joins(:explainer_items).where('explainer_items.project_media_id = ?', self.id).map(&:title).join("\n")
+    titles.blank? ? nil : titles
+  end
 end
diff --git a/app/models/explainer_item.rb b/app/models/explainer_item.rb
index 7359df17de..7051a5e021 100644
--- a/app/models/explainer_item.rb
+++ b/app/models/explainer_item.rb
@@ -10,6 +10,7 @@ class ExplainerItem < ApplicationRecord
   validate :cant_apply_article_to_item_if_article_is_in_the_trash
 
   after_create :log_relevant_article_results
+  after_commit :update_elasticsearch_data
 
   def version_metadata(_changes)
     { explainer_title: self.explainer.title }.to_json
@@ -25,6 +26,24 @@ def cant_apply_article_to_item_if_article_is_in_the_trash
     errors.add(:base, I18n.t(:cant_apply_article_to_item_if_article_is_in_the_trash)) if self.explainer&.trashed
   end
 
+  def update_elasticsearch_data
+    return if self.disable_es_callbacks || RequestStore.store[:disable_es_callbacks]
+    pm = self.project_media
+    # touch item to update `updated_at` date
+    if ProjectMedia.exists?(pm.id)
+      updated_at = Time.now
+      pm.update_columns(updated_at: updated_at)
+      data = { updated_at: updated_at.utc }
+      data['explainer_title'] = {
+        method: "explainers_titles",
+        klass: pm.class.name,
+        id: pm.id,
+        default: nil,
+      }
+      pm.update_elasticsearch_doc(data.keys, data, pm.id, true)
+    end
+  end
+
   def log_relevant_article_results
     ex = self.explainer
     self.project_media.delay.log_relevant_results(ex.class.name, ex.id, User.current&.id, self.class.actor_session_id)
diff --git a/app/repositories/media_search.rb b/app/repositories/media_search.rb
index ea534bc737..7ada8a0af0 100644
--- a/app/repositories/media_search.rb
+++ b/app/repositories/media_search.rb
@@ -132,5 +132,7 @@ class MediaSearch
     indexes :negative_tipline_search_results_count, { type: 'long' }
 
     indexes :tipline_search_results_count, { type: 'long' }
+
+    indexes :explainer_title, { type: 'text', analyzer: 'check' }
   end
 end
diff --git a/app/workers/elastic_search_worker.rb b/app/workers/elastic_search_worker.rb
index 33a79d5650..87ca4da87c 100644
--- a/app/workers/elastic_search_worker.rb
+++ b/app/workers/elastic_search_worker.rb
@@ -15,7 +15,6 @@ def perform(model_data, options, type)
         ops = {
           'create_doc' => 'create_elasticsearch_doc_bg',
           'update_doc' => 'update_elasticsearch_doc_bg',
-          'remove_fields' => 'remove_fields_from_elasticsearch_doc_bg',
           'update_doc_team' => 'update_elasticsearch_doc_team_bg',
           'create_update_doc_nested' => 'create_update_nested_obj_bg',
           'destroy_doc' => 'destroy_elasticsearch_doc',
diff --git a/db/migrate/20250205224319_add_mapping_for_explainer_title_field.rb b/db/migrate/20250205224319_add_mapping_for_explainer_title_field.rb
new file mode 100644
index 0000000000..3c1a60ff0a
--- /dev/null
+++ b/db/migrate/20250205224319_add_mapping_for_explainer_title_field.rb
@@ -0,0 +1,13 @@
+class AddMappingForExplainerTitleField < ActiveRecord::Migration[6.1]
+  def change
+    options = {
+      index: CheckElasticSearchModel.get_index_alias,
+      body: {
+        properties: {
+          explainer_title: { type: 'text', analyzer: 'check' },
+        }
+      }
+    }
+    $repository.client.indices.put_mapping options
+  end
+end
diff --git a/lib/check_search.rb b/lib/check_search.rb
index c14d388ebd..50ced2a057 100644
--- a/lib/check_search.rb
+++ b/lib/check_search.rb
@@ -168,7 +168,7 @@ def should_hit_elasticsearch?
     end
     filters_blank = true
     ['tags', 'keyword', 'language', 'fc_language', 'request_language', 'report_language', 'team_tasks', 'assigned_to', 'report_status', 'range_numeric',
-      'has_claim', 'cluster_teams', 'published_by', 'annotated_by', 'channels', 'cluster_published_reports'
+      'has_article', 'cluster_teams', 'published_by', 'annotated_by', 'channels', 'cluster_published_reports'
     ].each do |filter|
       filters_blank = false unless @options[filter].blank?
     end
@@ -309,7 +309,7 @@ def build_es_medias_query
     custom_conditions.concat integer_terms_query('channel', 'channels')
     custom_conditions.concat integer_terms_query('source_id', 'sources')
     custom_conditions.concat doc_conditions
-    custom_conditions.concat has_claim_conditions
+    custom_conditions.concat has_article_conditions
     custom_conditions.concat file_filter
     custom_conditions.concat range_filter(:es)
     custom_conditions.concat numeric_range_filter
@@ -469,8 +469,7 @@ def keyword_conditions
     return [] if @options["keyword"].blank? || @options["keyword"].class.name != 'String'
     set_keyword_fields
     keyword_c = []
-    field_conditions = build_keyword_conditions_media_fields
-    keyword_c.concat field_conditions
+    keyword_c.concat build_keyword_conditions_media_fields
     # Search in requests
     [['request_username', 'username'], ['request_identifier', 'identifier'], ['request_content', 'content']].each do |pair|
       keyword_c << {
@@ -497,7 +496,7 @@ def set_keyword_fields
   def build_keyword_conditions_media_fields
     es_fields = []
     conditions = []
-    %w(title description url claim_description_content fact_check_title fact_check_summary claim_description_context fact_check_url source_name).each do |f|
+    %w(title description url claim_description_content fact_check_title fact_check_summary claim_description_context fact_check_url source_name explainer_title).each do |f|
       es_fields << f if should_include_keyword_field?(f)
     end
     es_fields << 'analysis_title' if should_include_keyword_field?('title')
@@ -530,13 +529,18 @@ def request_language_conditions
     [{ nested: { path: 'requests', query: { terms: { 'requests.language': @options['request_language'] } } } }]
   end
 
-  def has_claim_conditions
+  def has_article_conditions
     conditions = []
-    return conditions unless @options.has_key?('has_claim')
-    if @options['has_claim'].include?('NO_VALUE')
-      conditions << { bool: { must_not: [ { exists: { field: 'claim_description_content' } } ] } }
-    elsif @options['has_claim'].include?('ANY_VALUE')
-      conditions << { exists: { field: 'claim_description_content' } }
+    return conditions unless @options.has_key?('has_article')
+    # Build a condidtion with fields that define the item has_article
+    has_article_c = []
+    ['claim_description_content', 'explainer_title'].each do |field|
+      has_article_c << { exists: { field: field } }
+    end
+    if @options['has_article'].include?('NO_VALUE')
+      conditions << { bool: { must_not: has_article_c } }
+    elsif @options['has_article'].include?('ANY_VALUE')
+      conditions << { bool: { should: has_article_c } }
     end
     conditions
   end
diff --git a/lib/tasks/migrate/20250205224319_add_mapping_for_explainer_title_field.rake b/lib/tasks/migrate/20250205224319_add_mapping_for_explainer_title_field.rake
new file mode 100644
index 0000000000..9095db5c60
--- /dev/null
+++ b/lib/tasks/migrate/20250205224319_add_mapping_for_explainer_title_field.rake
@@ -0,0 +1,21 @@
+namespace :check do
+  namespace :migrate do
+    task project_media_explainer_title: :environment do
+      started = Time.now.to_i
+      index_alias = CheckElasticSearchModel.get_index_alias
+      skip_pmids = []
+      es_body = []
+      ExplainerItem.find_each do |raw|
+        next if skip_pmids.include?(raw.project_media_id)
+        pm = raw.project_media
+        doc_id =  Base64.encode64("ProjectMedia/#{pm.id}")
+        fields = { 'explainer_title' => pm.explainers_titles }
+        es_body << { update: { _index: index_alias, _id: doc_id, retry_on_conflict: 3, data: { doc: fields } } }
+        skip_pmids << pm.id
+      end
+      $repository.client.bulk body: es_body unless es_body.blank?
+      minutes = ((Time.now.to_i - started) / 60).to_i
+      puts "[#{Time.now}] Done in #{minutes} minutes."
+    end
+  end
+end
\ No newline at end of file
diff --git a/test/controllers/elastic_search_7_test.rb b/test/controllers/elastic_search_7_test.rb
index 6788b0963f..4a239f660a 100644
--- a/test/controllers/elastic_search_7_test.rb
+++ b/test/controllers/elastic_search_7_test.rb
@@ -170,10 +170,10 @@ def setup
     assert_equal [pm.id, pm2.id], result.medias.map(&:id).sort
   end
 
-  test "should filter by keyword and tite description tags and notes fields fields" do
+  test "should filter by keyword and field settings(tite description tags)" do
+    RequestStore.store[:skip_cached_field_update] = false
     create_verification_status_stuff(false)
     t = create_team
-    p = create_project team: t
     pender_url = CheckConfig.get('pender_url_private') + '/api/medias'
     url = 'http://test.com'
     response = '{"type":"media","data":{"url":"' + url + '/normalized","type":"item", "title": "search_title", "description":"search_desc"}}'
@@ -183,20 +183,20 @@ def setup
     WebMock.stub_request(:get, pender_url).with({ query: { url: url2 } }).to_return(body: response)
     m = create_media(account: create_valid_account, url: url)
     m1 = create_media(account: create_valid_account, url: url2)
-    pm = create_project_media project: p, media: m, disable_es_callbacks: false
-    pm2 = create_project_media project: p, media: m1, disable_es_callbacks: false
+    pm = create_project_media team: t, media: m, disable_es_callbacks: false
+    pm2 = create_project_media team: t, media: m1, disable_es_callbacks: false
     # add analysis to pm2
     pm2.analysis = { title: 'override_title', content: 'override_description' }
     # add tags to pm3
-    pm3 = create_project_media project: p, disable_es_callbacks: false
+    pm3 = create_project_media team: t, disable_es_callbacks: false
     create_tag tag: 'search_title', annotated: pm3, disable_es_callbacks: false
     create_tag tag: 'another_desc', annotated: pm3, disable_es_callbacks: false
     create_tag tag: 'newtag', annotated: pm3, disable_es_callbacks: false
-    sleep 2
+    sleep 1
     result = CheckSearch.new({keyword: 'search_title'}.to_json, nil, t.id)
-    assert_equal [pm.id, pm2.id, pm3.id], result.medias.map(&:id).sort
+    assert_equal [pm.id, pm3.id], result.medias.map(&:id).sort
     result = CheckSearch.new({keyword: 'search_title', keyword_fields: {fields: ['title']}}.to_json, nil, t.id)
-    assert_equal [pm.id, pm2.id], result.medias.map(&:id).sort
+    assert_equal [pm.id], result.medias.map(&:id)
     result = CheckSearch.new({keyword: 'search_desc', keyword_fields: {fields: ['description']}}.to_json, nil, t.id)
     assert_equal [pm.id], result.medias.map(&:id)
     result = CheckSearch.new({keyword: 'override_title', keyword_fields: {fields: ['title']}}.to_json, nil, t.id)
@@ -206,9 +206,7 @@ def setup
     result = CheckSearch.new({keyword: 'search_title', keyword_fields: {fields: ['tags']}}.to_json, nil, t.id)
     assert_equal [pm3.id], result.medias.map(&:id)
     result = CheckSearch.new({keyword: 'another_desc', keyword_fields: {fields:['description', 'tags']}}.to_json, nil, t.id)
-    assert_equal [pm2.id, pm3.id], result.medias.map(&:id).sort
-    create_comment annotated: pm, text: 'item notepm', disable_es_callbacks: false
-    create_comment annotated: pm2, text: 'item comment', disable_es_callbacks: false
+    assert_equal [pm3.id], result.medias.map(&:id)
   end
 
   test "should search by media url" do
diff --git a/test/controllers/elastic_search_9_test.rb b/test/controllers/elastic_search_9_test.rb
index 14993cc7bd..e35d5aa71b 100644
--- a/test/controllers/elastic_search_9_test.rb
+++ b/test/controllers/elastic_search_9_test.rb
@@ -6,28 +6,66 @@ def setup
     setup_elasticsearch
   end
 
-  test "should filter items by has_claim" do
+  test "should filter items by has_article" do
     t = create_team
     p = create_project team: t
     u = create_user
     create_team_user team: t, user: u, role: 'admin'
     with_current_user_and_team(u ,t) do
-      pm = create_project_media team: t, disable_es_callbacks: false
+      pm = create_project_media team: t, quote: 'explainer_search', disable_es_callbacks: false
       pm2 = create_project_media team: t, disable_es_callbacks: false
       pm3 = create_project_media team: t, disable_es_callbacks: false
       pm4 = create_project_media team: t, disable_es_callbacks: false
+      pm5 = create_project_media team: t, disable_es_callbacks: false
       cd = create_claim_description project_media: pm, disable_es_callbacks: false
-      create_claim_description project_media: pm3, disable_es_callbacks: false
+      ex2_a = create_explainer team: t
+      ex2_b = create_explainer team: t
+      ex3 = create_explainer team: t
+      pm2.explainers << ex2_a
+      pm2.explainers << ex2_b
+      pm3.explainers << ex3
+      ex4 = create_explainer team: t, title: 'explainer_search'
+      cd4 = create_claim_description project_media: pm4, disable_es_callbacks: false
+      pm4.explainers << ex4
+      sleep 1
+      results = CheckSearch.new({ has_article: ['ANY_VALUE'] }.to_json)
+      assert_equal [pm.id, pm2.id, pm3.id, pm4.id], results.medias.map(&:id).sort
+      results = CheckSearch.new({ has_article: ['NO_VALUE'] }.to_json)
+      assert_equal [pm5.id], results.medias.map(&:id).sort
+      # remove explainer
+      ExplainerItem.where(explainer_id: ex2_a.id, project_media_id: pm2.id).destroy_all
+      ExplainerItem.where(explainer_id: ex3.id, project_media_id: pm3.id).destroy_all
+      cd4.project_media_id = nil
+      cd4.save!
       sleep 1
-      results = CheckSearch.new({ has_claim: ['ANY_VALUE'] }.to_json)
-      assert_equal [pm.id, pm3.id], results.medias.map(&:id).sort
-      results = CheckSearch.new({ has_claim: ['NO_VALUE'] }.to_json)
-      assert_equal [pm2.id, pm4.id], results.medias.map(&:id).sort
+      results = CheckSearch.new({ has_article: ['ANY_VALUE'] }.to_json)
+      assert_equal [pm.id, pm2.id, pm4.id], results.medias.map(&:id).sort
+      results = CheckSearch.new({ has_article: ['NO_VALUE'] }.to_json)
+      assert_equal [pm3.id, pm5.id], results.medias.map(&:id).sort
+      # remove fact-check and explainer
       cd.project_media_id = nil
       cd.save!
+      ExplainerItem.where(explainer_id: ex2_b.id, project_media_id: pm2.id).destroy_all
+      ExplainerItem.where(explainer_id: ex4.id, project_media_id: pm4.id).destroy_all
       sleep 1
-      results = CheckSearch.new({ has_claim: ['NO_VALUE'] }.to_json)
-      assert_equal [pm.id, pm2.id, pm4.id], results.medias.map(&:id).sort
+      results = CheckSearch.new({ has_article: ['ANY_VALUE'] }.to_json)
+      assert_empty results.medias.map(&:id)
+      results = CheckSearch.new({ has_article: ['NO_VALUE'] }.to_json)
+      assert_equal [pm.id, pm2.id, pm3.id, pm4.id, pm5.id], results.medias.map(&:id).sort
+      # re-assing fact or explainer
+      cd.project_media_id = pm2.id
+      cd.save!
+      pm5.explainers << ex4
+      sleep 1
+      results = CheckSearch.new({ has_article: ['ANY_VALUE'] }.to_json)
+      assert_equal [pm2.id, pm5.id], results.medias.map(&:id).sort
+      results = CheckSearch.new({ has_article: ['NO_VALUE'] }.to_json)
+      assert_equal [pm.id, pm3.id, pm4.id], results.medias.map(&:id).sort
+      # Verify search by explainer_title field
+      result = CheckSearch.new({keyword: 'explainer_search'}.to_json, nil, t.id)
+      assert_equal [pm.id, pm5.id], result.medias.map(&:id).sort
+      result = CheckSearch.new({keyword: 'explainer_search', keyword_fields: {fields: ['explainer_title']}}.to_json, nil, t.id)
+      assert_equal [pm5.id], result.medias.map(&:id)
     end
   end