10 lines
		
	
	
	
		
			286 B
		
	
	
	
		
			Ruby
		
	
	
	
	
	
		
		
			
		
	
	
			10 lines
		
	
	
	
		
			286 B
		
	
	
	
		
			Ruby
		
	
	
	
	
	
|  | class CreateInstances < ActiveRecord::Migration[5.2] | ||
|  |   def change | ||
|  |     create_view :instances, materialized: true | ||
|  | 
 | ||
|  |     # To be able to refresh the view concurrently, | ||
|  |     # at least one unique index is required | ||
|  |     safety_assured { add_index :instances, :domain, unique: true } | ||
|  |   end | ||
|  | end |