Simplify tag search_for method

app/models/admin/tag_filter.rb

@@ -32,7 +32,7 @@ class Admin::TagFilter
     when :status
       status_scope(value)
     when :name
-      Tag.search_for(value.to_s.strip, params[:limit], params[:offset], exclude_unlistable: false)
+      Tag.search_for(value, params[:limit], params[:offset], exclude_unlistable: false)
     when :order
       order_scope(value)
     else

app/models/tag.rb

@@ -67,6 +67,8 @@ class Tag < ApplicationRecord
                         }
   scope :matches_name, ->(term) { where(arel_table[:name].lower.matches(arel_table.lower("#{sanitize_sql_like(Tag.normalize(term))}%"), nil, true)) } # Search with case-sensitive to use B-tree index
 
+  scope :by_name_length, -> { order(Arel.sql('LENGTH(name)').asc, name: :asc) }
+
   update_index('tags', :self)
 
   def to_param
@@ -122,16 +124,19 @@ class Tag < ApplicationRecord
     end
 
     def search_for(term, limit = 5, offset = 0, options = {})
-      stripped_term = term.strip
       options.reverse_merge!({ exclude_unlistable: true, exclude_unreviewed: false })
 
-      query = Tag.matches_name(stripped_term)
+      search_query(term.to_s.strip, options)
-      query = query.merge(Tag.listable) if options[:exclude_unlistable]
-      query = query.merge(matching_name(stripped_term).or(reviewed)) if options[:exclude_unreviewed]
-
-      query.order(Arel.sql('LENGTH(name)').asc, name: :asc)
         .limit(limit)
         .offset(offset)
+        .by_name_length
+    end
+
+    def search_query(term, options)
+      matches_name(term).tap do |query|
+        query.merge!(listable) if options[:exclude_unlistable]
+        query.merge!(reviewed) if options[:exclude_unreviewed]
+      end
     end
 
     def find_normalized(name)

spec/models/tag_spec.rb

@@ -280,6 +280,23 @@ RSpec.describe Tag do
       expect(results).to eq [tag]
     end
 
+    it 'finds tag records from padded term queries' do
+      tag = Fabricate(:tag, name: 'MATCH')
+      _miss_tag = Fabricate(:tag, name: 'miss')
+
+      results = described_class.search_for('  match  ')
+
+      expect(results)
+        .to contain_exactly(tag)
+    end
+
+    it 'handles nil query' do
+      results = described_class.search_for(nil)
+
+      expect(results)
+        .to be_empty
+    end
+
     it 'finds the exact matching tag as the first item' do
       similar_tag = Fabricate(:tag, name: 'matchlater', reviewed_at: Time.now.utc)
       tag = Fabricate(:tag, name: 'match', reviewed_at: Time.now.utc)
@@ -306,5 +323,16 @@ RSpec.describe Tag do
 
       expect(results).to eq [tag, unlisted_tag]
     end
+
+    it 'excludes non reviewed tags via option' do
+      tag = Fabricate(:tag, name: 'match', reviewed_at: 5.days.ago)
+      unreviewed_tag = Fabricate(:tag, name: 'matchreviewed', reviewed_at: nil)
+
+      results = described_class.search_for('match', 5, 0, exclude_unreviewed: true)
+
+      expect(results)
+        .to include(tag)
+        .and not_include(unreviewed_tag)
+    end
   end
 end