How to determine the type of a variable in Golang?

Question

PostgreSQL

I am new to Go. and I ran into such a problem:
I take the site address from the database (postgerysql) and try to parse it, but it doesn’t work. when I specify a variable with the same site address in the code (variable), then everything works. the address is stored in the character(255) column in the database. for the parser I use github.com/PuerkitoBio/goquery

Answer 1

fmt.Printf("%T\n", var)

Answer 2

package main

import (
  "fmt"
  "database/sql"
  _ "github.com/lib/pq"
  "log"
  "github.com/PuerkitoBio/goquery"
)

type SaitsInfo struct {
  s_url,s_name,s_block string
}

func (this SaitsInfo) view(){
  doc, err := goquery.NewDocument(this.s_url)
  if err != nil {
    log.Fatal(err)
  }
  doc.Find(".offers_box_table tr .txt_box2").Each(func(i int, s *goquery.Selection){
    band := s.Find("a").Text()
    title := s.Find("span").Text()
    fmt.Printf("Review %d: %s - %s\n", i, band, title)
  })
}
var (
  url      string
  name     string
  block    string
)
func main()  {
  db, err := sql.Open("postgres", "данные подключения")
  if err != nil {
    log.Fatal(err)
  }
  saits, err := db.Query(`SELECT url,name,block FROM saits`)
  if err != nil {
    log.Fatal(err)
  }
  for saits.Next(){
    if err := saits.Scan(&url,&name,&block); err != nil{
      log.Fatal(err)
    }
    si := SaitsInfo{url, name, block}
    si.view()
  }
  defer db.Close()
}