Clojurians Log v2

Just rename the parameter and add another one:

(pco/defresolver all-users
  [env _]
  {::pco/output
   [{:user/all
     [:user/id
      :user/name
      :user/age]}]}
  (let [{:keys [below-age above-age] (pco/params env)]
    {:user/all
     (vec
       (cond->> (vals users)
         below-age (filter #(< (:user/age %) below-age))
         above-age (filter #(< above-age (:user/age %)))))}))

['(:user/all {:above-age 15, :below-age 42})]

You can do many things with this, like sorting, limiting, or paging.

['(:user/all {:above-age 15, :below-age 42, :sort-by-key :user/name, :limit 5, :offset 10})]

(pco/defresolver all-users
  [env _]
  {::pco/output
   [{:user/all
     [:user/id
      :user/name
      :user/age]}]}
  (let [{:keys [below-age above-age sort-by-key offset limit] (pco/params env)]
    {:user/all
     (vec
       (cond->> (vals users)
         below-age   (filter #(< (:user/age %) below-age))
         above-age   (filter #(< above-age (:user/age %))
         sort-by-key (sort-by sort-by-key)
         offset      (drop offset)
         limit       (take limit)))}))

if you wanna work on some more generic / full feature thing, you can see https://walkable.gitlab.io/ for inspiration

and here is another way, using params (this option makes easier for the user to customize it in the query at any level):

(ns com.wsscode.pathom3.fenton-demo
  (:require [com.wsscode.pathom3.connect.indexes :as pci]
            [com.wsscode.pathom3.connect.operation :as pco]
            [com.wsscode.pathom3.interface.eql :as p.eql]))

(def users
  {1 #:user{:id   1
            :name "joe"
            :age  22}
   2 #:user{:id   2
            :name "bob"
            :age  10}})

(pco/defresolver all-users
  [env _]
  {::pco/output
   [{:user/all
     [:user/id
      :user/name
      :user/age]}]}
  (let [cutoff-age (-> (pco/params env) :user/cutoff-age)]
    {:user/all
     (cond->>
       (vec (vals users))

       cutoff-age
       (filterv #(>= (:user/age %) cutoff-age)))}))

(def env
  (-> {}
      (pci/register all-users)))

(comment
  ; gets all users
  (p.eql/process env [:user/all])

  ; only over 15
  (p.eql/process env ['(:user/all {:user/cutoff-age 15})]))

🙏. Very kind of you.

no worries, let me know if you have any questions about the approaches

How do we let the user specify in their query what they want to do with the age? age < X or age > X or X < age < Y?