Workflow model

app/models/task.rb

@@ -3,6 +3,7 @@
 class Task < ApplicationRecord
   belongs_to :project
   belongs_to :status, class_name: 'TaskStatus'
+  belongs_to :workflow
 
   validates :number, :title, presence: true
   validates :number, numericality: { greater_than: 0 }

app/models/task_status.rb

@@ -2,6 +2,7 @@
 
 class TaskStatus < ApplicationRecord
   belongs_to :project
+  belongs_to :workflow
 
   enum :category, { backlog: 100, analysis: 1000, development: 20_000, fulfillment: 60_000 }
 

app/models/workflow.rb

@@ -0,0 +1,11 @@
+# frozen_string_literal: true
+
+class Workflow < ApplicationRecord
+  belongs_to :project
+
+  has_many :tasks, dependent: :restrict_with_exception
+  has_mnay :statuses, dependent: :restrict_with_error
+
+  enum :icon, { task: 'task', warning: 'warning' }, default: 'task', scopes: false
+  enum :color, { blue: 'blue', gray: 'gray', yellow: 'yellow', red: 'red' }, default: 'gray', scopes: false
+end