如何插入多维数组

Question

want to save the data of the following format

{"_ibj_id":"1","url_id":'1',"url":{"0":"http://0.com","1":"http:://1.com"}}

Look at my code,

type db_list struct {
    Url_id int
    Url    map[int]string
}
func list(table *mgo.Collection) {

    var doc *goquery.Document

    var e error

    for i := 1628644; i > 1628643; i-- {

        if doc, e = goquery.NewDocument("http://www.120ask.com/list/all/" + strconv.Itoa(i)); e != nil {

            panic(e.Error())

        }

        var save_list db_list

        save_list.Url_id = i

        save_list.Url = make(map[int]string)

        //fmt.Println("%s", doc.Text())

        doc.Find(".q-quename").Each(func(n int, s *goquery.Selection) {

            href, isTrue := s.Attr("href")

            if isTrue {

                save_list.Url[n] = href

                fmt.Println("%D : %s", n, save_list.Url[n])

            }

        })

        fmt.Println("%D", len(save_list.Url))

        //save database

        table.Insert(save_list)

    }

}

The database will eventually save Please view the picture in the annex, is to save the format of the data, save the URLvalue of the property 1

Answer 1

You're probably after the JSON Unmarshal function in encoding/json

{"_ibj_id":"1","url_id":'1',"url":{"0":"http://0.com","1":"http:://1.com"}} is technically invalid JSON due to the single-quotes around the url_id value( '1' should be "1") but other than that, it should map nicely to the following struct:

{
id string
url_id string
urls []string
}

But you may need to experiment with the types. According to the docs for the Unmarshal function, it will use the following Go types for each JSON type:

bool, for JSON booleans
float64, for JSON numbers
string, for JSON strings
[]interface{}, for JSON arrays
map[string]interface{}, for JSON objects
nil for JSON null

I'd highly recommend reading Andrew Gerrands Blog Post "JSON and Go".