create org model and schema manager

app/models/organization.rb

@@ -0,0 +1,27 @@
+# frozen_string_literal: true
+
+class Organization < ApplicationRecord
+  validates :name, presence: true
+  validates :subdomain, presence: true, uniqueness: true
+  
+  after_create :create_schema
+  before_destroy :drop_schema
+  
+  def schema_name
+    "org_#{id.to_s.gsub('-', '_')}"
+  end
+  
+  def with_schema(&block)
+    SchemaManager.with_schema(id, &block)
+  end
+  
+  private
+  
+  def create_schema
+    SchemaManager.create_schema(id)
+  end
+  
+  def drop_schema
+    SchemaManager.drop_schema(id)
+  end
+end