英文:
Is there any method similar to Golang's Scan() method (used for SQL) for Elasticsearch?
问题
我是你的中文翻译助手，以下是翻译好的内容：
我对Go和ES都不熟悉。我想将以下代码片段转换为类似于以下Elasticsearch查询的代码：
query = `SELECT roll_no, name, school FROM students where roll_no = $1`
err = db.QueryRowContext(ctx, query, roll_no).Scan(&Student.ID, &Student.Name, &Student.School)
转换为：
str := fmt.Sprintf(`{"query": { "match": { "roll_no" : %d } } }`, roll_no)
b := []byte(str)
// 调用 retrieve 方法，如下所示
我正在使用HTTP调用连接到ES，但以下代码在解析时显示http: panic serving [::1]:5574: EOF错误。
func retrieve(url string, b []byte) ([]byte, error) {
request, _ := http.NewRequest("GET", url, bytes.NewBuffer(b))
request.Header.Set("Content-Type", "application/json; charset=UTF-8")
client := &http.Client{}
response, error := client.Do(request)
if error != nil {
panic(error)
}
defer response.Body.Close()
body, _ := ioutil.ReadAll(response.Body)
s := Student{}
error = json.NewDecoder(response.Body).Decode(&s)
if error != nil {
panic(error)
}
fmt.Printf("Student: %v", s)
return body, error
}
有没有办法通过解析将其存储到一个对象中？
英文:
I am new to both Go and ES. I want to convert the following piece of code:
query = `SELECT roll_no, name, school FROM students where roll_no = $1`
err = db.QueryRowContext(ctx, query, roll_no).Scan(&Student.ID, &Student.Name, &Student.School)
into something like the following Elasticsearch query:
str = fmt.Sprintf(`{"query": { "match": { "roll_no" : %d } } }`, roll_no)
b := []byte(str)
// calls retrieve method, which is shown below
I am connecting to ES using HTTP calls, but the following code is showing http: panic serving [::1]:5574: EOF error while parsing.
func retrieve(url string, b []byte) ([]byte, error) {
request, _ := http.NewRequest("GET", url, bytes.NewBuffer(b))
request.Header.Set("Content-Type", "application/json; charset=UTF-8")
client := &http.Client{}
response, error := client.Do(request)
if error != nil {
panic(error)
}
defer response.Body.Close()
body, _ := ioutil.ReadAll(response.Body)
s := Student{}
error = json.NewDecoder(response.Body).Decode(&s)
if error != nil {
panic(error)
}
fmt.Printf("Student: %v", s)
return body, error
}
Is there anyway I can store it into an object by parsing?
答案1
得分: 1
你可以使用Golang的Scan()方法（通常用于SQL）在Elasticsearch中吗？
完全不行。
database/sql包需要一个数据库驱动程序，而Elasticsearch没有提供这样的驱动程序。
英文:
> How can I use Golang's Scan() method (normally used for SQL) in Elasticsearch?
Not at all.
Package database/sql needs a database driver and there isn't one for ES.
通过集体智慧和协作来改善编程学习和解决问题的方式。致力于成为全球开发者共同参与的知识库，让每个人都能够通过互相帮助和分享经验来进步。
评论