我是新手去后台开发。我正在尝试使用mysql数据库和go来创建restapi。
func getUsers(w http.ResponseWriter, r *http.Request) {
db, err := sql.Open("mysql", "root:mypassword@tcp(127.0.0.1:3306/test)")
if err != nil {
panic(err.Error())
}
results, err := db.Query("Select * from users")
if err != nil {
panic(err.Error())
}
for results.Next() {
var user User
err = results.Scan(&user.FirstName)
if err != nil {
panic(err.Error)
}
fmt.Println(user.FirstName)
}
//scores is an array that i have already created just to return dummy data
json.NewEncoder(w).Encode(scores)
}我得到这个错误：
http: panic serving [::1]:54508: invalid DSN: network address not terminated (missing closing brace)
goroutine 5 [running]:
net/http.(*conn).serve.func1(0xc42009abe0)
/usr/local/go/src/net/http/server.go:1726 +0xd0
panic(0x129cea0, 0xc420010ec0)
/usr/local/go/src/runtime/panic.go:505 +0x229
main.getUsers(0x134bca0, 0xc42011e000, 0xc42011c200)
/Users/tushar/go/src/github.com/tushar/jump/main.go:62 +0x33f
net/http.HandlerFunc.ServeHTTP(0x1326230, 0x134bca0, 0xc42011e000, 0xc42011c200)
/usr/local/go/src/net/http/server.go:1947 +0x44
github.com/gorilla/mux.(*Router).ServeHTTP(0xc420110000, 0x134bca0, 0xc42011e000, 0xc42011c200)
/Users/tushar/go/src/github.com/gorilla/mux/mux.go:162 +0xed
net/http.serverHandler.ServeHTTP(0xc42008aea0, 0x134bca0, 0xc42011e000, 0xc42011c000)
/usr/local/go/src/net/http/server.go:2694 +0xbc
net/http.(*conn).serve(0xc42009abe0, 0x134bf60, 0xc420062240)
/usr/local/go/src/net/http/server.go:1830 +0x651
created by net/http.(*Server).Serve
/usr/local/go/src/net/http/server.go:2795 +0x27b我不能理解这个问题。
当没有db查询时，它可以正常工作。
编辑1:editted sql.open将右大括号更改为 root:mypassword@tcp(127.0.0.1:3306)/test 查询时工作正常
但是当我插入数据库的时候我很惊慌
func insertUsers(w http.ResponseWriter, r *http.Request) {
db, err := sql.Open("mysql", "root:mypassword@tcp(127.0.0.1:3306)/test")
if err != nil {
panic(err.Error())
}
insert, err := db.Query("Insert into users (personId,firstName,lastName) values(20,tushar,saha)")
if err != nil {
panic(err.Error)
}
defer insert.Close()
}这是错误1
2018/06/23 11:54:10 http: panic serving [::1]:54802: 0x126a8b0
goroutine 19 [running]:
net/http.(*conn).serve.func1(0xc4200aebe0)
/usr/local/go/src/net/http/server.go:1726 +0xd0
panic(0x129bb20, 0xc42016a020)
/usr/local/go/src/runtime/panic.go:505 +0x229
main.insertUsers(0x134bc80, 0xc42013c000, 0xc420138200)
/Users/tushar/go/src/github.com/tushar/jump/main.go:50 +0x15d
net/http.HandlerFunc.ServeHTTP(0x1326218, 0x134bc80, 0xc42013c000, 0xc420138200)
/usr/local/go/src/net/http/server.go:1947 +0x44
github.com/gorilla/mux.(*Router).ServeHTTP(0xc42012c000, 0x134bc80, 0xc42013c000, 0xc420138200)
/Users/tushar/go/src/github.com/gorilla/mux/mux.go:162 +0xed
net/http.serverHandler.ServeHTTP(0xc420095040, 0x134bc80, 0xc42013c000, 0xc420138000)
/usr/local/go/src/net/http/server.go:2694 +0xbc
net/http.(*conn).serve(0xc4200aebe0, 0x134bf40, 0xc42009a200)
/usr/local/go/src/net/http/server.go:1830 +0x651
created by net/http.(*Server).Serve
/usr/local/go/src/net/http/server.go:2795 +0x27b
1条答案
按热度按时间rdlzhqv91#
dsn（即第二个）参数
sql.Open()方法的格式不正确。只有地址部分(
127.0.0.1:3306)应该用括号括起来。在括号中还包含了数据库名称。请尝试以下操作：
文件格式为：
回应“编辑1”
err.Error()是一种方法。在insert查询的错误处理块中，您没有调用该方法。而是打印出它的内存位置。
如果实际调用该方法（类似于
sql.Open())，您将打印出错误消息，指出错误所在。