Golang Join array interface

Question

I try to create bulk insert. I use gorm github.com/jinzhu/gorm

import (
    "fmt"
    dB "github.com/edwinlab/api/repositories"
)

func Up         


        

Answer 1

If you want to pass elements of a slice to a function with variadic parameter, you have to use ... to tell the compiler you want to pass all elements individually and not pass the slice value as a single argument, so simply do:

tx.Exec(sqlStr, vals...)

This is detailed in the spec: Passing arguments to ... parameters.

Tx.Exec() has the signature of:

func (tx *Tx) Exec(query string, args ...interface{}) (Result, error)

So you have to pass vals.... Also don't forget to check returned error, e.g.:

res, err := tx.Exec(sqlStr, vals...)
if err != nil {
    // handle error
}