Typescript function overload implicitly has any type

type UpdateConsumerT = {
  obj: {
    min_quantity: number
    fixed_price: number
    date_start: string | boolean
    date_end: string | boolean
  }
}

type UpdateProducerT = {
  obj: {
    min_qty: number
    price: number
    date_start: string | boolean
    date_end: string | boolean
  }
}

export async function updatePricelistItem(
  pricelist_item_id: number,
  obj: UpdateConsumerT,
  isProduction: false
): Promise<number>
export async function updatePricelistItem(
  pricelist_item_id: number,
  obj: UpdateProducerT,
  isProduction: true
): Promise<number>
export async function updatePricelistItem(
  pricelist_item_id,
  obj,
  isProduction = false
) { ... }

I have this function, and i try to use overloads

But for some reason it says

Parameter ‘pricelist_item_id’ implicitly has an ‘any’ type.ts(7006)

MEDevel.com: Open-source for Healthcare and Education

Collecting and validating open-source software for healthcare, education, enterprise, development, medical imaging, medical records, and digital pathology.

Visit Medevel

My question is, what am i doing wrong here?

>Solution :

You will need to explicitly specify the parameter types and return type on the implementation:

type UpdateConsumerT = {
  obj: {
    min_quantity: number
    fixed_price: number
    date_start: string | boolean
    date_end: string | boolean
  }
}

type UpdateProducerT = {
  obj: {
    min_qty: number
    price: number
    date_start: string | boolean
    date_end: string | boolean
  }
}

async function updatePricelistItem(
  pricelist_item_id: number,
  obj: UpdateConsumerT,
  isProduction: false
): Promise<number>
async function updatePricelistItem(
  pricelist_item_id: number,
  obj: UpdateProducerT,
  isProduction: true
): Promise<number>
async function updatePricelistItem(
  pricelist_item_id: number,
  obj: UpdateProducerT | UpdateConsumerT,
  isProduction = false
): Promise<number> { return new Promise(() => {}) }

Playground