how to fix issue with body-params values not being picked up by clojure muuntaja middleware - clojure

Question

I'm trying to adapt the code here https://github.com/danownsthisspace/shorturl/blob/main/src/shorturl/core.clj with this:
(ns todo.core
(:require [clojure.pprint :as pprint]
[muuntaja.core :as m]
[reitit.ring :as ring]
[reitit.ring.middleware.muuntaja :as muuntaja]
[ring.adapter.jetty :as ring-jetty]
[ring.util.response :as r]
[todo.db :as db]))
(defn todo-items-save [req]
(clojure.pprint/pprint req)
(let [title (get-in req [:body-params :title])
content (get-in req [:body-params :content])]
(r/response (str "foooo" title))))
(def app
(ring/ring-handler
(ring/router
[["/"
["" {:handler (fn [req] {:body "hello" :status 200})}]]
["/api/todo" {:post {:handler todo-items-save}
:get (fn [req]
(let [todos db/get-todos]
(r/response todos)))}]
{:data {:muuntaja m/instance :middleware [muuntaja/format-middleware]}}])))
(defn start []
(ring-jetty/run-jetty #'app {:port 3002 :join? false}))
(def server (start))
(.stop server)
but I'm seeing that the body-params values are null. I was wondering why that is when I'm making a post request with the body {"content":"only a test", "title":"second"}. Thank you.

Answer 1

The problem was, that the muuntaja config was passed as part of the
routes instead of argument to ring/router
(def app
(ring/ring-handler
(ring/router
[["/"
["" {:handler (fn [req] {:body "hello" :status 200})}]]
["/api/todo" {:post {:handler todo-items-save}
:get (fn [req]
(let [todos db/get-todos]
(r/response todos)))}]]
; XXX this must be the second argument to `ring/router`
{:data {:muuntaja m/instance
:middleware [muuntaja/format-middleware]}})))