add dynamic documents

app/models/template.rb

@@ -70,6 +70,12 @@ class Template < ApplicationRecord
   has_many :submissions, dependent: :destroy
   has_many :template_sharings, dependent: :destroy
   has_many :template_accesses, dependent: :destroy
+  has_many :dynamic_documents, dependent: :destroy
+  has_many :dynamic_document_versions, through: :dynamic_documents, source: :versions
+
+  has_many :schema_dynamic_documents, lambda { |e|
+    where(uuid: e.schema.select { |e| e['dynamic'] }.pluck('attachment_uuid'))
+  }, class_name: 'DynamicDocument', dependent: :destroy, inverse_of: :template
 
   scope :active, -> { where(archived_at: nil) }
   scope :archived, -> { where.not(archived_at: nil) }