Call-back Functions

There are two ways to automate interjection through call-back functions during calls:

• document hooks,
• preemptive guards.

Hooks

Hooks allow you to make operations on documents (queries and payloads) during an API call. The main intention is to allow schema conversions to and from MongoDB.

(require '[com.timezynk.mongo.hooks :refer [with-hooks]])

(with-hooks {:write #(rename-keys % {:a :b})
             :read  #(rename-keys % {:b :a})}
  (fetch-and-update-one! :coll
                         {:a 1}
                         {:$set {}}))

Guards

Guards allow you to add checks and operations before an API call is made. Inserts, updates, replacements each have their own guard.

Each guard has a default behaviour.

Insert

text

Update

text

Replace

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Early Return

text