Temporarily wire up filtering on the form

app/controllers/bubbles_controller.rb

@@ -5,6 +5,11 @@ class BubblesController < ApplicationController
 
   def index
     @bubbles = @bucket.bubbles.not_popped.reverse_chronologically
+
+    if params[:filter].present?
+      @bubbles = @bubbles.mentioning(params[:filter])
+    end
+
     @most_active_bubbles = @bubbles.ordered_by_activity.limit(10)
 
     if params[:tag_id]

app/models/bubble.rb

@@ -13,4 +13,13 @@ class Bubble < ApplicationRecord
   scope :ordered_by_activity, -> { left_joins(:comments, :boosts).group(:id).order(Arel.sql("COUNT(comments.id) + COUNT(boosts.id) DESC")) }
 
   searchable_by :title, using: :bubbles_search_index
+
+  scope :mentioning, ->(query) do
+    bubbles = search(query).select(:id).to_sql
+    comments = Comment.search(query).select(:bubble_id).to_sql
+
+    left_joins(:comments)
+      .where("bubbles.id in (#{bubbles}) or comments.bubble_id in (#{comments})")
+      .distinct
+  end
 end

app/models/concerns/searchable.rb

@@ -10,7 +10,7 @@ module Searchable
       after_update_commit  :update_in_search_index
       after_destroy_commit :remove_from_search_index
 
-      scope :search, ->(query) { joins("join #{using} idx on id = idx.rowid").where("idx.#{field} match ?", query) }
+      scope :search, ->(query) { joins("join #{using} idx on #{table_name}.id = idx.rowid").where("idx.#{field} match ?", query) }
     end
   end
 

app/views/bubbles/index.html.erb

@@ -105,7 +105,9 @@
 
 <section class="bubbles-list unpad-inline center margin-block-start">
   <header class="flex-inline align-center center gap txt-small">
-    <input type="search" class="input center flex-inline" placeholder="Type to filter…">
+    <form>
+      <input type="search" name="filter" class="input center flex-inline" placeholder="Type to filter…" value="<%= params[:filter] %>">
+    </form>
   </header>
   <ul class="unpad margin-none flex flex-column txt-align-start center">
     <%= render partial: "bubbles/list/bubble", collection: @bubbles %>

test/models/bubble_test.rb

@@ -6,4 +6,12 @@ class BubbleTest < ActiveSupport::TestCase
 
     assert_includes Bubble.search("haggis"), bubble
   end
+
+  test "mentioning" do
+    bubble = buckets(:writebook).bubbles.create! title: "Insufficient haggis", creator: users(:kevin)
+    bubbles(:logo).comments.create! body: "I hate haggis", creator: users(:kevin)
+    bubbles(:text).comments.create! body: "I love haggis", creator: users(:kevin)
+
+    assert_equal [ bubble, bubbles(:logo), bubbles(:text) ].sort, Bubble.mentioning("haggis").sort
+  end
 end