Extract scenic view model common methods to concern (#28111)

app/models/account_summary.rb

@@ -10,21 +10,13 @@
 #
 
 class AccountSummary < ApplicationRecord
+  include DatabaseViewRecord
+
   self.primary_key = :account_id
 
-  has_many :follow_recommendation_suppressions, primary_key: :account_id, foreign_key: :account_id, inverse_of: false
+  has_many :follow_recommendation_suppressions, primary_key: :account_id, foreign_key: :account_id, inverse_of: false, dependent: nil
 
   scope :safe, -> { where(sensitive: false) }
   scope :localized, ->(locale) { order(Arel::Nodes::Case.new.when(arel_table[:language].eq(locale)).then(1).else(0).desc) }
   scope :filtered, -> { where.missing(:follow_recommendation_suppressions) }
-
-  def self.refresh
-    Scenic.database.refresh_materialized_view(table_name, concurrently: true, cascade: false)
-  rescue ActiveRecord::StatementInvalid
-    Scenic.database.refresh_materialized_view(table_name, concurrently: false, cascade: false)
-  end
-
-  def readonly?
-    true
-  end
 end

app/models/concerns/database_view_record.rb

@@ -0,0 +1,25 @@
+# frozen_string_literal: true
+
+module DatabaseViewRecord
+  extend ActiveSupport::Concern
+
+  class_methods do
+    def refresh
+      Scenic.database.refresh_materialized_view(
+        table_name,
+        concurrently: true,
+        cascade: false
+      )
+    rescue ActiveRecord::StatementInvalid
+      Scenic.database.refresh_materialized_view(
+        table_name,
+        concurrently: false,
+        cascade: false
+      )
+    end
+  end
+
+  def readonly?
+    true
+  end
+end

app/models/follow_recommendation.rb

@@ -10,6 +10,8 @@
 #
 
 class FollowRecommendation < ApplicationRecord
+  include DatabaseViewRecord
+
   self.primary_key = :account_id
   self.table_name = :global_follow_recommendations
 
@@ -17,14 +19,4 @@ class FollowRecommendation < ApplicationRecord
   belongs_to :account
 
   scope :localized, ->(locale) { joins(:account_summary).merge(AccountSummary.localized(locale)) }
-
-  def self.refresh
-    Scenic.database.refresh_materialized_view(table_name, concurrently: true, cascade: false)
-  rescue ActiveRecord::StatementInvalid
-    Scenic.database.refresh_materialized_view(table_name, concurrently: false, cascade: false)
-  end
-
-  def readonly?
-    true
-  end
 end

app/models/instance.rb

@@ -9,6 +9,8 @@
 #
 
 class Instance < ApplicationRecord
+  include DatabaseViewRecord
+
   self.primary_key = :domain
 
   attr_accessor :failure_days
@@ -27,10 +29,6 @@ class Instance < ApplicationRecord
   scope :by_domain_and_subdomains, ->(domain) { where("reverse('.' || domain) LIKE reverse(?)", "%.#{domain}") }
   scope :with_domain_follows, ->(domains) { where(domain: domains).where(domain_account_follows) }
 
-  def self.refresh
-    Scenic.database.refresh_materialized_view(table_name, concurrently: true, cascade: false)
-  end
-
   def self.domain_account_follows
     Arel.sql(
       <<~SQL.squish
@@ -44,10 +42,6 @@ class Instance < ApplicationRecord
     )
   end
 
-  def readonly?
-    true
-  end
-
   def delivery_failure_tracker
     @delivery_failure_tracker ||= DeliveryFailureTracker.new(domain)
   end

app/models/user_ip.rb

@@ -10,11 +10,9 @@
 #
 
 class UserIp < ApplicationRecord
+  include DatabaseViewRecord
+
   self.primary_key = :user_id
 
   belongs_to :user
-
-  def readonly?
-    true
-  end
 end