Shard the search index into 16 tables

Create search_index_0 to search_index_15 tables and shard each index by
account id. MySQL has no ability to pre-filter fulltext indexes by
another field so this is the best bet for improving performance.

Each fulltest index internally creates 11 sub tables (see
https://dev.mysql.com/doc/refman/8.4/en/innodb-fulltext-index.html) so
actually we have 192 tables in total here.

The search_index table name is generated dynamically based on the
account_id.

app/controllers/prompts/cards_controller.rb

@@ -20,7 +20,7 @@ class Prompts::CardsController < ApplicationController
 
     def search_cards
       published_cards
-        .mentioning(params[:filter], board_ids: Current.user.board_ids)
+        .mentioning(params[:filter], user: Current.user)
         .reverse_chronologically
         .limit(MAX_RESULTS)
     end

app/models/card/searchable.rb

@@ -4,13 +4,14 @@ module Card::Searchable
   included do
     include ::Searchable
 
-    scope :mentioning, ->(query, board_ids:) do
+    scope :mentioning, ->(query, user:) do
       query = Search::Query.wrap(query)
 
       if query.valid?
-        joins("INNER JOIN search_index ON search_index.card_id = cards.id AND search_index.board_id = cards.board_id")
-          .where("search_index.board_id IN (?)", board_ids)
-          .where("MATCH(search_index.content, search_index.title) AGAINST(? IN BOOLEAN MODE)", query.to_s)
+        table_name = Searchable.search_index_table_name(user.account_id)
+        joins("INNER JOIN #{table_name} ON #{table_name}.card_id = cards.id AND #{table_name}.board_id = cards.board_id")
+          .where("#{table_name}.board_id IN (?)", user.board_ids)
+          .where("MATCH(#{table_name}.content, #{table_name}.title) AGAINST(? IN BOOLEAN MODE)", query.to_s)
           .distinct
       else
         none

app/models/concerns/searchable.rb

@@ -1,6 +1,10 @@
 module Searchable
   extend ActiveSupport::Concern
 
+  def self.search_index_table_name(account_id)
+    "search_index_#{account_id % 16}"
+  end
+
   included do
     after_create_commit :create_in_search_index
     after_update_commit :update_in_search_index
@@ -13,8 +17,10 @@ module Searchable
 
   private
     def create_in_search_index
+      table_name = Searchable.search_index_table_name(account_id)
+
       self.class.connection.execute self.class.sanitize_sql([
-        "INSERT INTO search_index (searchable_type, searchable_id, card_id, board_id, title, content, created_at) VALUES (?, ?, ?, ?, ?, ?, ?)",
+        "INSERT INTO #{table_name} (searchable_type, searchable_id, card_id, board_id, title, content, created_at) VALUES (?, ?, ?, ?, ?, ?, ?)",
         self.class.name,
         id,
         search_card_id,
@@ -26,8 +32,10 @@ module Searchable
     end
 
     def update_in_search_index
+      table_name = Searchable.search_index_table_name(account_id)
+
       result = self.class.connection.execute(self.class.sanitize_sql([
-        "UPDATE search_index SET card_id = ?, board_id = ?, title = ?, content = ?, created_at = ? WHERE searchable_type = ? AND searchable_id = ?",
+        "UPDATE #{table_name} SET card_id = ?, board_id = ?, title = ?, content = ?, created_at = ? WHERE searchable_type = ? AND searchable_id = ?",
         search_card_id,
         search_board_id,
         search_title,
@@ -41,8 +49,10 @@ module Searchable
     end
 
     def remove_from_search_index
+      table_name = Searchable.search_index_table_name(account_id)
+
       self.class.connection.execute self.class.sanitize_sql([
-        "DELETE FROM search_index WHERE searchable_type = ? AND searchable_id = ?",
+        "DELETE FROM #{table_name} WHERE searchable_type = ? AND searchable_id = ?",
         self.class.name,
         id
       ])

app/models/filter.rb

@@ -33,7 +33,7 @@ class Filter < ApplicationRecord
       result = result.closed_at_window(closure_window) if closure_window
       result = result.closed_by(closers) if closers.present?
       result = terms.reduce(result) do |result, term|
-        result.mentioning(term, board_ids: creator.board_ids)
+        result.mentioning(term, user: creator)
       end
 
       result

app/models/search.rb

@@ -27,24 +27,25 @@ class Search
       query_string = query.to_s
       sanitized_query = Search::Result.connection.quote(query_string)
       sanitized_raw_query = Search::Result.connection.quote(query.terms)
+      table_name = Searchable.search_index_table_name(user.account_id)
 
-      Search::Result.from("search_index")
-        .joins("INNER JOIN cards ON search_index.card_id = cards.id")
+      Search::Result.from(table_name)
+        .joins("INNER JOIN cards ON #{table_name}.card_id = cards.id")
         .joins("INNER JOIN boards ON cards.board_id = boards.id")
-        .where("search_index.board_id IN (?)", board_ids)
-        .where("MATCH(search_index.content, search_index.title) AGAINST(? IN BOOLEAN MODE)", query_string)
+        .where("#{table_name}.board_id IN (?)", board_ids)
+        .where("MATCH(#{table_name}.content, #{table_name}.title) AGAINST(? IN BOOLEAN MODE)", query_string)
         .select([
-          "search_index.card_id as card_id",
-          "CASE WHEN search_index.searchable_type = 'Comment' THEN search_index.searchable_id ELSE NULL END as comment_id",
-          "COALESCE(search_index.title, cards.title) AS card_title_in_database",
-          "CASE WHEN search_index.searchable_type = 'Card' THEN search_index.content ELSE NULL END AS card_description_in_database",
-          "CASE WHEN search_index.searchable_type = 'Comment' THEN search_index.content ELSE NULL END AS comment_body_in_database",
+          "#{table_name}.card_id as card_id",
+          "CASE WHEN #{table_name}.searchable_type = 'Comment' THEN #{table_name}.searchable_id ELSE NULL END as comment_id",
+          "COALESCE(#{table_name}.title, cards.title) AS card_title_in_database",
+          "CASE WHEN #{table_name}.searchable_type = 'Card' THEN #{table_name}.content ELSE NULL END AS card_description_in_database",
+          "CASE WHEN #{table_name}.searchable_type = 'Comment' THEN #{table_name}.content ELSE NULL END AS comment_body_in_database",
           "boards.name as board_name",
           "cards.creator_id",
-          "search_index.created_at as created_at",
-          "MATCH(search_index.content, search_index.title) AGAINST(#{sanitized_query} IN BOOLEAN MODE) AS score",
+          "#{table_name}.created_at as created_at",
+          "MATCH(#{table_name}.content, #{table_name}.title) AGAINST(#{sanitized_query} IN BOOLEAN MODE) AS score",
           "#{sanitized_raw_query} AS query"
         ].join(","))
-        .order("search_index.created_at DESC")
+        .order("#{table_name}.created_at DESC")
     end
 end

config/brakeman.ignore

@@ -46,6 +46,52 @@
       ],
       "note": ""
     },
+    {
+      "warning_type": "SQL Injection",
+      "warning_code": 0,
+      "fingerprint": "08f15e8e259f1da31762507f718191732f86a4f4f6d2fe2719e70fd22c9bc738",
+      "check_name": "SQL",
+      "message": "Possible SQL injection",
+      "file": "app/models/search.rb",
+      "line": 33,
+      "link": "https://brakemanscanner.org/docs/warning_types/sql_injection/",
+      "code": "Search::Result.from(Searchable.search_index_table_name(user.account_id)).joins(\"INNER JOIN cards ON #{Searchable.search_index_table_name(user.account_id)}.card_id = cards.id\")",
+      "render_path": null,
+      "location": {
+        "type": "method",
+        "class": "Search",
+        "method": "perform_search"
+      },
+      "user_input": "Searchable.search_index_table_name(user.account_id)",
+      "confidence": "Medium",
+      "cwe_id": [
+        89
+      ],
+      "note": ""
+    },
+    {
+      "warning_type": "SQL Injection",
+      "warning_code": 0,
+      "fingerprint": "e2069dcaa15f04898b9ad356ee3277e4a0b718e88c991c86d896dbded1b47f97",
+      "check_name": "SQL",
+      "message": "Possible SQL injection",
+      "file": "app/models/card/searchable.rb",
+      "line": 12,
+      "link": "https://brakemanscanner.org/docs/warning_types/sql_injection/",
+      "code": "joins(\"INNER JOIN #{Searchable.search_index_table_name(account_id)} ON #{Searchable.search_index_table_name(account_id)}.card_id = cards.id AND #{Searchable.search_index_table_name(account_id)}.board_id = cards.board_id\")",
+      "render_path": null,
+      "location": {
+        "type": "method",
+        "class": "Card::Searchable",
+        "method": null
+      },
+      "user_input": "Searchable.search_index_table_name(account_id)",
+      "confidence": "Medium",
+      "cwe_id": [
+        89
+      ],
+      "note": ""
+    },
     {
       "warning_type": "Mass Assignment",
       "warning_code": 70,

db/migrate/20251112093037_create_search_index.rb

@@ -1,20 +0,0 @@
-class CreateSearchIndex < ActiveRecord::Migration[8.2]
-  def up
-    create_table :search_index do |t|
-      t.string :searchable_type, null: false
-      t.bigint :searchable_id, null: false
-      t.bigint :card_id, null: false
-      t.bigint :board_id, null: false
-      t.string :title
-      t.text :content
-      t.datetime :created_at, null: false
-
-      t.index [:searchable_type, :searchable_id], unique: true
-      t.index [:content, :title], type: :fulltext, name: "index_search_index_on_content_and_title"
-    end
-  end
-
-  def down
-    drop_table :search_index
-  end
-end

db/migrate/20251112093037_create_search_indices.rb

@@ -0,0 +1,24 @@
+class CreateSearchIndex < ActiveRecord::Migration[8.2]
+  def up
+    16.times do |i|
+      create_table "search_index_#{i}".to_sym do |t|
+        t.string :searchable_type, null: false
+        t.bigint :searchable_id, null: false
+        t.bigint :card_id, null: false
+        t.bigint :board_id, null: false
+        t.string :title
+        t.text :content
+        t.datetime :created_at, null: false
+
+        t.index [:searchable_type, :searchable_id], unique: true, name: "idx_si#{i}_type_id"
+        t.index [:content, :title], type: :fulltext, name: "idx_si#{i}_fulltext"
+      end
+    end
+  end
+
+  def down
+    16.times do |i|
+      drop_table "search_index_#{i}".to_sym
+    end
+  end
+end

db/schema.rb

@@ -375,7 +375,7 @@ ActiveRecord::Schema[8.2].define(version: 2025_11_12_093037) do
     t.index ["reacter_id"], name: "index_reactions_on_reacter_id"
   end
 
-  create_table "search_index", charset: "utf8mb4", collation: "utf8mb4_0900_ai_ci", force: :cascade do |t|
+  create_table "search_index_0", charset: "utf8mb4", collation: "utf8mb4_0900_ai_ci", force: :cascade do |t|
     t.bigint "board_id", null: false
     t.bigint "card_id", null: false
     t.text "content"
@@ -383,8 +383,188 @@ ActiveRecord::Schema[8.2].define(version: 2025_11_12_093037) do
     t.bigint "searchable_id", null: false
     t.string "searchable_type", null: false
     t.string "title"
-    t.index ["content", "title"], name: "index_search_index_on_content_and_title", type: :fulltext
-    t.index ["searchable_type", "searchable_id"], name: "index_search_index_on_searchable_type_and_searchable_id", unique: true
+    t.index ["content", "title"], name: "idx_si0_fulltext", type: :fulltext
+    t.index ["searchable_type", "searchable_id"], name: "idx_si0_type_id", unique: true
+  end
+
+  create_table "search_index_1", charset: "utf8mb4", collation: "utf8mb4_0900_ai_ci", force: :cascade do |t|
+    t.bigint "board_id", null: false
+    t.bigint "card_id", null: false
+    t.text "content"
+    t.datetime "created_at", null: false
+    t.bigint "searchable_id", null: false
+    t.string "searchable_type", null: false
+    t.string "title"
+    t.index ["content", "title"], name: "idx_si1_fulltext", type: :fulltext
+    t.index ["searchable_type", "searchable_id"], name: "idx_si1_type_id", unique: true
+  end
+
+  create_table "search_index_10", charset: "utf8mb4", collation: "utf8mb4_0900_ai_ci", force: :cascade do |t|
+    t.bigint "board_id", null: false
+    t.bigint "card_id", null: false
+    t.text "content"
+    t.datetime "created_at", null: false
+    t.bigint "searchable_id", null: false
+    t.string "searchable_type", null: false
+    t.string "title"
+    t.index ["content", "title"], name: "idx_si10_fulltext", type: :fulltext
+    t.index ["searchable_type", "searchable_id"], name: "idx_si10_type_id", unique: true
+  end
+
+  create_table "search_index_11", charset: "utf8mb4", collation: "utf8mb4_0900_ai_ci", force: :cascade do |t|
+    t.bigint "board_id", null: false
+    t.bigint "card_id", null: false
+    t.text "content"
+    t.datetime "created_at", null: false
+    t.bigint "searchable_id", null: false
+    t.string "searchable_type", null: false
+    t.string "title"
+    t.index ["content", "title"], name: "idx_si11_fulltext", type: :fulltext
+    t.index ["searchable_type", "searchable_id"], name: "idx_si11_type_id", unique: true
+  end
+
+  create_table "search_index_12", charset: "utf8mb4", collation: "utf8mb4_0900_ai_ci", force: :cascade do |t|
+    t.bigint "board_id", null: false
+    t.bigint "card_id", null: false
+    t.text "content"
+    t.datetime "created_at", null: false
+    t.bigint "searchable_id", null: false
+    t.string "searchable_type", null: false
+    t.string "title"
+    t.index ["content", "title"], name: "idx_si12_fulltext", type: :fulltext
+    t.index ["searchable_type", "searchable_id"], name: "idx_si12_type_id", unique: true
+  end
+
+  create_table "search_index_13", charset: "utf8mb4", collation: "utf8mb4_0900_ai_ci", force: :cascade do |t|
+    t.bigint "board_id", null: false
+    t.bigint "card_id", null: false
+    t.text "content"
+    t.datetime "created_at", null: false
+    t.bigint "searchable_id", null: false
+    t.string "searchable_type", null: false
+    t.string "title"
+    t.index ["content", "title"], name: "idx_si13_fulltext", type: :fulltext
+    t.index ["searchable_type", "searchable_id"], name: "idx_si13_type_id", unique: true
+  end
+
+  create_table "search_index_14", charset: "utf8mb4", collation: "utf8mb4_0900_ai_ci", force: :cascade do |t|
+    t.bigint "board_id", null: false
+    t.bigint "card_id", null: false
+    t.text "content"
+    t.datetime "created_at", null: false
+    t.bigint "searchable_id", null: false
+    t.string "searchable_type", null: false
+    t.string "title"
+    t.index ["content", "title"], name: "idx_si14_fulltext", type: :fulltext
+    t.index ["searchable_type", "searchable_id"], name: "idx_si14_type_id", unique: true
+  end
+
+  create_table "search_index_15", charset: "utf8mb4", collation: "utf8mb4_0900_ai_ci", force: :cascade do |t|
+    t.bigint "board_id", null: false
+    t.bigint "card_id", null: false
+    t.text "content"
+    t.datetime "created_at", null: false
+    t.bigint "searchable_id", null: false
+    t.string "searchable_type", null: false
+    t.string "title"
+    t.index ["content", "title"], name: "idx_si15_fulltext", type: :fulltext
+    t.index ["searchable_type", "searchable_id"], name: "idx_si15_type_id", unique: true
+  end
+
+  create_table "search_index_2", charset: "utf8mb4", collation: "utf8mb4_0900_ai_ci", force: :cascade do |t|
+    t.bigint "board_id", null: false
+    t.bigint "card_id", null: false
+    t.text "content"
+    t.datetime "created_at", null: false
+    t.bigint "searchable_id", null: false
+    t.string "searchable_type", null: false
+    t.string "title"
+    t.index ["content", "title"], name: "idx_si2_fulltext", type: :fulltext
+    t.index ["searchable_type", "searchable_id"], name: "idx_si2_type_id", unique: true
+  end
+
+  create_table "search_index_3", charset: "utf8mb4", collation: "utf8mb4_0900_ai_ci", force: :cascade do |t|
+    t.bigint "board_id", null: false
+    t.bigint "card_id", null: false
+    t.text "content"
+    t.datetime "created_at", null: false
+    t.bigint "searchable_id", null: false
+    t.string "searchable_type", null: false
+    t.string "title"
+    t.index ["content", "title"], name: "idx_si3_fulltext", type: :fulltext
+    t.index ["searchable_type", "searchable_id"], name: "idx_si3_type_id", unique: true
+  end
+
+  create_table "search_index_4", charset: "utf8mb4", collation: "utf8mb4_0900_ai_ci", force: :cascade do |t|
+    t.bigint "board_id", null: false
+    t.bigint "card_id", null: false
+    t.text "content"
+    t.datetime "created_at", null: false
+    t.bigint "searchable_id", null: false
+    t.string "searchable_type", null: false
+    t.string "title"
+    t.index ["content", "title"], name: "idx_si4_fulltext", type: :fulltext
+    t.index ["searchable_type", "searchable_id"], name: "idx_si4_type_id", unique: true
+  end
+
+  create_table "search_index_5", charset: "utf8mb4", collation: "utf8mb4_0900_ai_ci", force: :cascade do |t|
+    t.bigint "board_id", null: false
+    t.bigint "card_id", null: false
+    t.text "content"
+    t.datetime "created_at", null: false
+    t.bigint "searchable_id", null: false
+    t.string "searchable_type", null: false
+    t.string "title"
+    t.index ["content", "title"], name: "idx_si5_fulltext", type: :fulltext
+    t.index ["searchable_type", "searchable_id"], name: "idx_si5_type_id", unique: true
+  end
+
+  create_table "search_index_6", charset: "utf8mb4", collation: "utf8mb4_0900_ai_ci", force: :cascade do |t|
+    t.bigint "board_id", null: false
+    t.bigint "card_id", null: false
+    t.text "content"
+    t.datetime "created_at", null: false
+    t.bigint "searchable_id", null: false
+    t.string "searchable_type", null: false
+    t.string "title"
+    t.index ["content", "title"], name: "idx_si6_fulltext", type: :fulltext
+    t.index ["searchable_type", "searchable_id"], name: "idx_si6_type_id", unique: true
+  end
+
+  create_table "search_index_7", charset: "utf8mb4", collation: "utf8mb4_0900_ai_ci", force: :cascade do |t|
+    t.bigint "board_id", null: false
+    t.bigint "card_id", null: false
+    t.text "content"
+    t.datetime "created_at", null: false
+    t.bigint "searchable_id", null: false
+    t.string "searchable_type", null: false
+    t.string "title"
+    t.index ["content", "title"], name: "idx_si7_fulltext", type: :fulltext
+    t.index ["searchable_type", "searchable_id"], name: "idx_si7_type_id", unique: true
+  end
+
+  create_table "search_index_8", charset: "utf8mb4", collation: "utf8mb4_0900_ai_ci", force: :cascade do |t|
+    t.bigint "board_id", null: false
+    t.bigint "card_id", null: false
+    t.text "content"
+    t.datetime "created_at", null: false
+    t.bigint "searchable_id", null: false
+    t.string "searchable_type", null: false
+    t.string "title"
+    t.index ["content", "title"], name: "idx_si8_fulltext", type: :fulltext
+    t.index ["searchable_type", "searchable_id"], name: "idx_si8_type_id", unique: true
+  end
+
+  create_table "search_index_9", charset: "utf8mb4", collation: "utf8mb4_0900_ai_ci", force: :cascade do |t|
+    t.bigint "board_id", null: false
+    t.bigint "card_id", null: false
+    t.text "content"
+    t.datetime "created_at", null: false
+    t.bigint "searchable_id", null: false
+    t.string "searchable_type", null: false
+    t.string "title"
+    t.index ["content", "title"], name: "idx_si9_fulltext", type: :fulltext
+    t.index ["searchable_type", "searchable_id"], name: "idx_si9_type_id", unique: true
   end
 
   create_table "search_queries", charset: "utf8mb4", collation: "utf8mb4_0900_ai_ci", force: :cascade do |t|

lib/tasks/search.rake

@@ -1,8 +1,10 @@
 namespace :search do
   desc "Reindex all cards and comments in the search index"
   task reindex: :environment do
-    puts "Clearing search index..."
-    ActiveRecord::Base.connection.execute("DELETE FROM search_index")
+    puts "Clearing search index shards..."
+    16.times do |i|
+      ActiveRecord::Base.connection.execute("DELETE FROM search_index_#{i}")
+    end
 
     puts "Reindexing cards..."
     Card.find_each do |card|

test/models/card/searchable_test.rb

@@ -4,44 +4,45 @@ class Card::SearchableTest < ActiveSupport::TestCase
   self.use_transactional_tests = false
 
   setup do
-    ActiveRecord::Base.connection.execute "DELETE FROM search_index"
+    16.times { |i| ActiveRecord::Base.connection.execute "DELETE FROM search_index_#{i}" }
     Account.find_by(name: "Search Test")&.destroy
 
     @account = Account.create!(name: "Search Test")
     @user = User.create!(name: "Test User", account: @account)
     @board = Board.create!(name: "Test Board", account: @account, creator: @user)
+    Current.account = @account
   end
 
   teardown do
-    ActiveRecord::Base.connection.execute "DELETE FROM search_index"
+    16.times { |i| ActiveRecord::Base.connection.execute "DELETE FROM search_index_#{i}" }
     Account.find_by(name: "Search Test")&.destroy
   end
 
   test "card search" do
     # Searching by title
     card = @board.cards.create!(title: "layout is broken", creator: @user)
-    results = Card.mentioning("layout", board_ids: [@board.id])
+    results = Card.mentioning("layout", user: @user)
     assert_includes results, card
 
     # Searching by comment
     card_with_comment = @board.cards.create!(title: "Some card", creator: @user)
     card_with_comment.comments.create!(body: "overflowing text", creator: @user)
-    results = Card.mentioning("overflowing", board_ids: [@board.id])
+    results = Card.mentioning("overflowing", user: @user )
     assert_includes results, card_with_comment
 
     # Sanitizing search query
     card_broken = @board.cards.create!(title: "broken layout", creator: @user)
-    results = Card.mentioning("broken \"", board_ids: [@board.id])
+    results = Card.mentioning("broken \"", user: @user )
     assert_includes results, card_broken
 
     # Empty query returns no results
-    assert_empty Card.mentioning("\"", board_ids: [@board.id])
+    assert_empty Card.mentioning("\"", user: @user )
 
     # Filtering by board_ids
     other_board = Board.create!(name: "Other Board", account: @account, creator: @user)
     card_in_board = @board.cards.create!(title: "searchable content", creator: @user)
     card_in_other_board = other_board.cards.create!(title: "searchable content", creator: @user)
-    results = Card.mentioning("searchable", board_ids: [@board.id])
+    results = Card.mentioning("searchable", user: @user)
     assert_includes results, card_in_board
     assert_not_includes results, card_in_other_board
   end

test/models/comment/searchable_test.rb

@@ -4,32 +4,35 @@ class Comment::SearchableTest < ActiveSupport::TestCase
   self.use_transactional_tests = false
 
   setup do
-    ActiveRecord::Base.connection.execute "DELETE FROM search_index"
+    16.times { |i| ActiveRecord::Base.connection.execute "DELETE FROM search_index_#{i}" }
     Account.find_by(name: "Search Test")&.destroy
 
     @account = Account.create!(name: "Search Test")
     @user = User.create!(name: "Test User", account: @account)
     @board = Board.create!(name: "Test Board", account: @account, creator: @user)
     @card = @board.cards.create!(title: "Test Card", creator: @user)
+    Current.account = @account
   end
 
   teardown do
-    ActiveRecord::Base.connection.execute "DELETE FROM search_index"
+    16.times { |i| ActiveRecord::Base.connection.execute "DELETE FROM search_index_#{i}" }
     Account.find_by(name: "Search Test")&.destroy
   end
 
   test "comment search" do
+    table_name = Searchable.search_index_table_name(@account.id)
+
     # Comment is indexed on create
     comment = @card.comments.create!(body: "searchable comment text", creator: @user)
     result = ActiveRecord::Base.connection.execute(
-      "SELECT COUNT(*) FROM search_index WHERE searchable_type = 'Comment' AND searchable_id = #{comment.id}"
+      "SELECT COUNT(*) FROM #{table_name} WHERE searchable_type = 'Comment' AND searchable_id = #{comment.id}"
     ).first[0]
     assert_equal 1, result
 
     # Comment is updated in index
     comment.update!(body: "updated text")
     content = ActiveRecord::Base.connection.execute(
-      "SELECT content FROM search_index WHERE searchable_type = 'Comment' AND searchable_id = #{comment.id}"
+      "SELECT content FROM #{table_name} WHERE searchable_type = 'Comment' AND searchable_id = #{comment.id}"
     ).first[0]
     assert_match /updat/, content
 
@@ -37,7 +40,7 @@ class Comment::SearchableTest < ActiveSupport::TestCase
     comment_id = comment.id
     comment.destroy
     result = ActiveRecord::Base.connection.execute(
-      "SELECT COUNT(*) FROM search_index WHERE searchable_type = 'Comment' AND searchable_id = #{comment_id}"
+      "SELECT COUNT(*) FROM #{table_name} WHERE searchable_type = 'Comment' AND searchable_id = #{comment_id}"
     ).first[0]
     assert_equal 0, result
 
@@ -45,14 +48,14 @@ class Comment::SearchableTest < ActiveSupport::TestCase
     card_with_comment = @board.cards.create!(title: "Card One", creator: @user)
     card_with_comment.comments.create!(body: "unique searchable phrase", creator: @user)
     card_without_comment = @board.cards.create!(title: "Card Two", creator: @user)
-    results = Card.mentioning("searchable", board_ids: [@board.id])
+    results = Card.mentioning("searchable", user: @user)
     assert_includes results, card_with_comment
     assert_not_includes results, card_without_comment
 
     # Comment stores parent card_id and board_id
     new_comment = @card.comments.create!(body: "test comment", creator: @user)
     row = ActiveRecord::Base.connection.execute(
-      "SELECT card_id, board_id FROM search_index WHERE searchable_type = 'Comment' AND searchable_id = #{new_comment.id}"
+      "SELECT card_id, board_id FROM #{table_name} WHERE searchable_type = 'Comment' AND searchable_id = #{new_comment.id}"
     ).first
     assert_equal @card.id, row[0]
     assert_equal @board.id, row[1]

test/models/search_test.rb

@@ -4,16 +4,17 @@ class SearchTest < ActiveSupport::TestCase
   self.use_transactional_tests = false
 
   setup do
-    ActiveRecord::Base.connection.execute "DELETE FROM search_index"
+    16.times { |i| ActiveRecord::Base.connection.execute "DELETE FROM search_index_#{i}" }
     Account.find_by(name: "Search Test")&.destroy
 
     @account = Account.create!(name: "Search Test")
     @user = User.create!(name: "Test User", account: @account)
     @board = Board.create!(name: "Test Board", account: @account, creator: @user)
+    Current.account = @account
   end
 
   teardown do
-    ActiveRecord::Base.connection.execute "DELETE FROM search_index"
+    16.times { |i| ActiveRecord::Base.connection.execute "DELETE FROM search_index_#{i}" }
     Account.find_by(name: "Search Test")&.destroy
   end