title: Arrow direction for fetching data from database in architecture diagram?
body: <p>In creating an architecture diagram, if you will just fetch data from the database and not write to it, where should the arrow point? I was thinking, it should be bidirectional since the app request from the database and the data is returned to the app. Or it should just be from the the DB towards the app even though the database cannot make an action on its own?</p>
  <p><a href="https://i.stack.imgur.com/PLDNF.png" rel="noreferrer"><img src="https://i.stack.imgur.com/PLDNF.png" alt="enter image description here" /></a></p>