decorateConstructor() — fastify Function Reference

Architecture documentation for the decorateConstructor() function in decorate.js from the fastify codebase.

Function javascript CoreKernel LifecycleManager calls 2 called by 2

Entity Profile

CoreKernel→ LifecycleManager→ decorateConstructor() — fastify Function Reference

Dependency Diagram

graph TD
  8e5a8605_9ce7_799e_064b_2022f3777b88["decorateConstructor()"]
  b5b3567f_29bc_3ac4_2dcc_eba5eeb01c3e["decorate.js"]
  8e5a8605_9ce7_799e_064b_2022f3777b88 -->|defined in| b5b3567f_29bc_3ac4_2dcc_eba5eeb01c3e
  81317479_062a_0436_b10a_76847ed5ed35["decorateReply()"]
  81317479_062a_0436_b10a_76847ed5ed35 -->|calls| 8e5a8605_9ce7_799e_064b_2022f3777b88
  c684bbc2_2367_f120_4e02_eaf31217d62b["decorateRequest()"]
  c684bbc2_2367_f120_4e02_eaf31217d62b -->|calls| 8e5a8605_9ce7_799e_064b_2022f3777b88
  11692e5b_f016_8497_4047_012d2b7bdd24["hasKey()"]
  8e5a8605_9ce7_799e_064b_2022f3777b88 -->|calls| 11692e5b_f016_8497_4047_012d2b7bdd24
  7d734264_83ae_0f9a_4ed9_57cba3726f85["checkDependencies()"]
  8e5a8605_9ce7_799e_064b_2022f3777b88 -->|calls| 7d734264_83ae_0f9a_4ed9_57cba3726f85
  style 8e5a8605_9ce7_799e_064b_2022f3777b88 fill:#6366f1,stroke:#818cf8,color:#fff

Relationship Graph

Source Code

lib/decorate.js lines 48–67

function decorateConstructor (konstructor, name, fn, dependencies) {
  const instance = konstructor.prototype
  if (Object.hasOwn(instance, name) || hasKey(konstructor, name)) {
    throw new FST_ERR_DEC_ALREADY_PRESENT(name)
  }

  konstructor[kHasBeenDecorated] = true
  checkDependencies(konstructor, name, dependencies)

  if (fn && (typeof fn.getter === 'function' || typeof fn.setter === 'function')) {
    Object.defineProperty(instance, name, {
      get: fn.getter,
      set: fn.setter
    })
  } else if (typeof fn === 'function') {
    instance[name] = fn
  } else {
    konstructor.props.push({ key: name, value: fn })
  }
}