fix: projects load by invite code slowly

app/models/project.rb

@@ -61,6 +61,7 @@
 #
 #  index_projects_on_forked_from_project_id  (forked_from_project_id)
 #  index_projects_on_identifier              (identifier)
+#  index_projects_on_invite_code             (invite_code)
 #  index_projects_on_is_public               (is_public)
 #  index_projects_on_lft                     (lft)
 #  index_projects_on_name                    (name)
@@ -74,6 +75,7 @@
 
 
 
+
 class Project < ApplicationRecord
   include Matchable
   include Publicable

app/services/projects/apply_join_service.rb

@@ -33,7 +33,7 @@ class Projects::ApplyJoinService < ApplicationService
   private
 
   def project
-    @_project ||= Project.find_by('binary(invite_code) = ? ',"#{params[:code].to_s.strip}")
+    @_project ||= Project.find_by(invite_code: params[:code].to_s.strip)
   end
 
   def role_value

db/migrate/20210615063727_add_invite_code_index_to_projects.rb

@@ -0,0 +1,8 @@
+class AddInviteCodeIndexToProjects < ActiveRecord::Migration[5.2]
+  def change
+    add_index :projects, :invite_code
+    execute <<-SQL
+      ALTER TABLE projects MODIFY COLUMN invite_code VARCHAR(255) BINARY CHARACTER SET utf8 COLLATE utf8_bin DEFAULT NULL;
+    SQL
+  end
+end