使用Go向Postgresql表中插入数据

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英文:

Inserting into a Postgresql table with Go

问题

我有以下表格:

CREATE TABLE Users (
  user_id BIGSERIAL PRIMARY KEY,
  email VARCHAR(50) NOT NULL,
  password_hash VARCHAR(100) NOT NULL,
  points INT DEFAULT 0,
  created_at TIMESTAMP NOT NULL DEFAULT NOW(),
  updated_at TIMESTAMP NOT NULL DEFAULT CURRENT_TIMESTAMP
)

我接收一个电子邮件和密码,加密密码并尝试将它们插入表格中:

import (
  _ "github.com/lib/pq"
  "database/sql"
  "code.google.com/p/go.crypto/bcrypt"
)

conn := OpenConnection()
defer conn.Close()
email := r.FormValue("email")
password, _ := bcrypt.GenerateFromPassword([]byte(r.FormValue("password")), bcrypt.DefaultCost)
res, err := conn.Exec("INSERT INTO users (email, password_hash) VALUES (?, ?)", email, password)
http.Redirect(w, r, "/", http.StatusFound)

插入操作抛出了 pq:"51" S:"ERROR" L:"1002" C:"42601" M:"syntax error at or near ","" F:"scan.l" R:"scanner_yyerror" 的错误。如果我将字节类型的密码替换为简单的字符串,会抛出相同的错误。

我做错了什么?

英文:

I have the following table:

CREATE TABLE Users (
  user_id BIGSERIAL PRIMARY KEY,
  email VARCHAR(50) NOT NULL,
  password_hash VARCHAR(100) NOT NULL,
  points INT DEFAULT 0,
  created_at TIMESTAMP NOT NULL DEFAULT NOW(),
  updated_at TIMESTAMP NOT NULL DEFAULT CURRENT_TIMESTAMP
)

I take in a email and password, encrypt the password and attempt to insert them into the table:

import (
  _ "github.com/lib/pq"
  "database/sql"
  "code.google.com/p/go.crypto/bcrypt"
)

conn := OpenConnection()
defer conn.Close()
email := r.FormValue("email")
password, _ := bcrypt.GenerateFromPassword([]byte(r.FormValue("password")), bcrypt.DefaultCost)
res, err := conn.Exec("INSERT INTO users (email, password_hash) VALUES (?, ?)", email, password)
http.Redirect(w, r, "/", http.StatusFound)

The insert throws pq: P:"51" S:"ERROR" L:"1002" C:"42601" M:"syntax error at or near \",\"" F:"scan.l" R:"scanner_yyerror". The same error is thrown if i replace the byte type password with a simple string.

What am I doing wrong?

答案1

得分: 2

我会在链接消失的情况下发布一个答案:
来自https://github.com/lib/pq/issues/65

> 由dpapathanasiou提供
> 我已经找到了问题所在;这不是pq的bug,而是我创建准备语句的方式有问题:我需要使用($n)而不是?来绑定参数。
>
> 所以这些语句都可以正确工作:

stmt, err := db.Prepare("select id from people where firstname = ($1) and lastname = ($2)")
stmt, err := db.Prepare("select id from people where firstname ~* ($1) and lastname ~* ($2)")
stmt, err := db.Prepare("select id from people where firstname = ($1)")
英文:

I will post as an answer in case the link goes away:
From https://github.com/lib/pq/issues/65

> by dpapathanasiou :
> I've figured out the problem; it's not a bug in pq but in the way I
> was creating the prepared statements: I need to use ($n) instead of ?
> for the bound parameters.
>
> So all of these statements work correctly:

stmt, err := db.Prepare("select id from people where firstname = ($1) and lastname = ($2)")
stmt, err := db.Prepare("select id from people where firstname ~* ($1) and lastname ~* ($2)")
stmt, err := db.Prepare("select id from people where firstname = ($1)")

huangapple
  • 本文由 发表于 2013年4月29日 06:11:38
  • 转载请务必保留本文链接:https://go.coder-hub.com/16268522.html
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