Using postgres-json with djula templating engine

When trying to use postgres-json with djula, it’s a lot easier to using alists instead of vectors.

Original code for postgres-json is:

(defun from-json (string)
  "Parse the JSON string STRING and return the resulting lisp object."
  (yason:parse string :json-arrays-as-vectors t))

But change it to:

(defun from-json (string)
  "Parse the JSON string STRING and return the resulting lisp object."
  (yason:parse string))

And you have to rebind a global variable as well to use your new function:

(defparameter *from-json* #'from-json)

Add both of these to the same namespace in your project and it will be a lot easier to use.