Setup pg_search (#12905)

* Add pg_search gem

* Add pg_search extensions

Gemfile

@@ -67,6 +67,7 @@ gem "omniauth-twitter", "~> 1.4" # OmniAuth strategy for Twitter
 gem "parallel", "~> 1.20" # Run any kind of code in parallel processes
 gem "patron", "~> 0.13.3" # HTTP client library based on libcurl, used with Elasticsearch to support http keep-alive connections
 gem "pg", "~> 1.2" # Pg is the Ruby interface to the PostgreSQL RDBMS
+gem "pg_search", "~> 2.3.5" # PgSearch builds Active Record named scopes that take advantage of PostgreSQL's full text search
 gem "puma", "~> 5.2.2" # Puma is a simple, fast, threaded, and highly concurrent HTTP 1.1 server
 gem "pundit", "~> 2.1" # Object oriented authorization for Rails applications
 gem "pusher", "~> 1.4" # Ruby library for Pusher Channels HTTP API

Gemfile.lock

@@ -525,6 +525,9 @@ GEM
       ast (~> 2.4.1)
     patron (0.13.3)
     pg (1.2.3)
+    pg_search (2.3.5)
+      activerecord (>= 5.2)
+      activesupport (>= 5.2)
     pry (0.13.1)
       coderay (~> 1.1)
       method_source (~> 1.0)
@@ -935,6 +938,7 @@ DEPENDENCIES
   parallel (~> 1.20)
   patron (~> 0.13.3)
   pg (~> 1.2)
+  pg_search (~> 2.3.5)
   pry (~> 0.13)
   pry-byebug (~> 3.8)
   pry-rails (~> 0.3)

db/migrate/20210304195203_pg_search_extensions.rb

@@ -0,0 +1,11 @@
+class PgSearchExtensions < ActiveRecord::Migration[6.0]
+  def up
+    enable_extension("unaccent") # For ignoring accent marks https://github.com/Casecommons/pg_search#ignoring-accent-marks
+    enable_extension("pg_trgm") # For trigram searches https://github.com/Casecommons/pg_search#trigram-trigram-search
+  end
+
+  def down
+    disable_extension("unaccent")
+    disable_extension("pg_trgm")
+  end
+end

db/schema.rb

@@ -10,12 +10,14 @@
 #
 # It's strongly recommended that you check this file into your version control system.
 
-ActiveRecord::Schema.define(version: 2021_02_19_043102) do
+ActiveRecord::Schema.define(version: 2021_03_04_195203) do
 
   # These are extensions that must be enabled in order to support this database
   enable_extension "citext"
+  enable_extension "pg_trgm"
   enable_extension "pgcrypto"
   enable_extension "plpgsql"
+  enable_extension "unaccent"
 
   create_table "ahoy_events", force: :cascade do |t|
     t.string "name"