Cannot read property 'QueryBuilder' of undefined

Compiling and running a simple typescript example results in TypeError: Cannot read property 'QueryBuilder' of undefined.

Environment

Knex version: 0.95.0 Node version: 14.16.0 Typescript version: 4.2.3

Steps to reproduce:

$ yarn init -y
$ yarn add typescript knex @types/node
$ tsc --init

Create a test.ts file with:

import {Knex} from 'knex'
console.log(Knex.QueryBuilder)

Then

$ tsc test.ts
$ node test.js

This yields the following error:

console.log(knex_1.Knex.QueryBuilder);
                        ^

TypeError: Cannot read property 'QueryBuilder' of undefined
    at Object.<anonymous> (/xxx/test.js:4:25)
    at Module._compile (internal/modules/cjs/loader.js:1063:30)
    at Object.Module._extensions..js (internal/modules/cjs/loader.js:1092:10)
    at Module.load (internal/modules/cjs/loader.js:928:32)
    at Function.Module._load (internal/modules/cjs/loader.js:769:14)
    at Function.executeUserEntryPoint [as runMain] (internal/modules/run_main.js:72:12)
    at internal/main/run_main_module.js:17:47

The Knex variable is not exported from the package, only knex. A simple fix could be to just add knex.Knex = knex to knex.js ?

[kibertoad]

@gudleik 0.95.0 with the fix released!

[kibertoad]

That does sounds like a problem with our types. I’ll take a look tomorrow. Code itself should work, I think we just miss a type there.