Let's say I have this function in my TypeScript API that communicates with database.
export const getClientByEmailOrId = async (data: { email: any, id: any }) => {
return knex(tableName)
.first()
.modify((x: any) => {
if (data.email) x.where('email', data.email)
else x.where('id', data.id)
})
}
In modify block you can see that I check what param was passed - id or email.
In code it looks like this:
const checkIfEmailUsed = await clientService.getClientByEmailOrId({ email: newEmail })
And here is the problem, I can't do that because of missing parameter. But what I need, is to pass it like this, and check what param was passed.
Of course, I can just do this:
const checkIfEmailUsed = await clientService.getClientByEmailOrId({ email: newEmail, id: null })
And this going to work. But does exist solution not to pass it like this: { email: newEmail, id: null }, but just by { email: newEmail }?
I think you are looking for optional parameters. You can mark properties of an object as optional by adding an ? to the type declaration.
type Data = {
email: any,
id?: any // <= and notice the ? here this makes id optional
}
export const getClientByEmailOrId = async (data: Data) => {
return knex(tableName)
.first()
.modify((x: any) => {
if (data.email) x.where('email', data.email)
else x.where('id', data.id)
})
}