Avoid redundant OAuth queries when not signed in

If you aren't signed in, you don't have an auth token.
When you don't have an auth token, React was sending the headers

"Authorization: Bearer null"

This caused 5 Doorkeeper token lookups using
WHERE "oauth_access_tokens"."token" = 'null'
on the Explore page (the root of the app when not signed in).

app/models/account_moderation_note.rb

@@ -15,11 +15,6 @@ class AccountModerationNote < ApplicationRecord
   belongs_to :account
   belongs_to :target_account, class_name: 'Account'
 
-  connects_to database: {
-    writing: :master,
-    reading: :master
-  }
-
   scope :latest, -> { reorder('created_at DESC') }
 
   validates :content, presence: true, length: { maximum: 500 }

app/models/account_verification_request.rb

@@ -15,8 +15,8 @@
 class AccountVerificationRequest < ApplicationRecord
 
 	connects_to database: {
-		writing: :master,
-		reading: :master
+		writing: :primary,
+		reading: :primary
 	}
 
 	LIMIT            = 4.megabytes

app/models/application_record.rb

@@ -2,7 +2,7 @@
 
 class ApplicationRecord < ActiveRecord::Base
   connects_to database: {
-    writing: :master,
+    writing: :primary,
     reading: :slave1
   }
   self.abstract_class = true

app/models/report.rb

@@ -29,11 +29,6 @@ class Report < ApplicationRecord
 
   validates :comment, length: { maximum: 1000 }
 
-  connects_to database: {
-    writing: :master,
-    reading: :master
-  }
-
   def local?
     false # Force uri_for to use uri attribute
   end

app/models/report_note.rb

@@ -19,9 +19,4 @@ class ReportNote < ApplicationRecord
 
   validates :content, presence: true, length: { maximum: 500 }
 
-  connects_to database: {
-    writing: :master,
-    reading: :master
-  }
-
 end

app/models/session_activation.rb

@@ -23,11 +23,6 @@ class SessionActivation < ApplicationRecord
            to: :access_token,
            allow_nil: true
 
-  connects_to database: {
-    writing: :master,
-    reading: :master
-  }
-
   def detection
     @detection ||= Browser.new(user_agent)
   end
@@ -45,7 +40,9 @@ class SessionActivation < ApplicationRecord
 
   class << self
     def active?(id)
-      id && where(session_id: id).exists?
+      ActiveRecord::Base.connected_to(role: :writing) do
+        id && where(session_id: id).exists?
+      end
     end
 
     def activate(**options)
@@ -61,19 +58,16 @@ class SessionActivation < ApplicationRecord
 
     def deactivate(id)
       return unless id
-      ActiveRecord::Base.connected_to(role: :writing) do
-        conn = ActiveRecord::Base.connection
-        conn.exec_query "delete from session_activations where session_id = '#{id}'"
-      end
+      where(session_id: id).destroy_all
     end
 
     def purge_old
       order('created_at desc').offset(Rails.configuration.x.max_session_activations).destroy_all
     end
 
-    def exclusive(id)
-      where('session_id != ?', id).destroy_all
-    end
+    #def exclusive(id)
+    #  where('session_id != ?', id).destroy_all
+    #end
   end
 
   private
@@ -93,6 +87,5 @@ class SessionActivation < ApplicationRecord
                                                           expires_in: Doorkeeper.configuration.access_token_expires_in,
                                                           use_refresh_token: Doorkeeper.configuration.refresh_token_enabled?)
     end
-    self.access_token
   end
 end