在node-mysql中选择WHERE IN

Does anyone know how to use SELECT WHERE IN in node-mysql?

有谁知道如何在node-mysql中使用SELECT WHERE IN?

I've tried the code below, but I get the following error message:

我已经尝试了下面的代码,但是我收到以下错误消息:

'You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near ''(`PHP`,`apache`)'' at line 1'

This is my code:

这是我的代码:

whereIn = '(';
for ( var i in tagArray ) {
    if ( i != tagArray.length - 1 ) {
        whereIn += "`" + tagArray[i] + "`,";    
    }else{
        whereIn += "`" + tagArray[i] + "`"; 
    }
}
whereIn += ')';

console.log(whereIn);

client.query(
    'SELECT tag_id FROM tag WHERE tag_name IN ?',
    [whereIn],
    function(err, result, fields) {
        client.destroy();

        if (err) {
            throw err;
        }

        console.log(result);

        res.redirect('/');
    }
);

5 个解决方案

#1

You have to use IN (?) and NOT IN ?.

你必须使用IN(?)和NOT IN?

Any string manipulation may result in a SQL INJECTION backdoor.

任何字符串操作都可能导致SQL INJECTION后门。

#2

You need to quote your strings, not use backticks.

你需要引用你的字符串,而不是使用反引号。

whereIn = '(';
for ( var i in tagArray ) {
    if ( i != tagArray.length - 1 ) {
        whereIn += "'" + tagArray[i] + "',";    
    }else{
        whereIn += "'" + tagArray[i] + "'"; 
    }
 }
whereIn += ')';

#3

For a more secure solution that avoids having to escape values, use ? params like you would normally do, but create the param placeholders dynamically like this:

对于避免必须转义值的更安全的解决方案,请使用?像往常一样的params,但动态创建param占位符:

var inlist = '';
for(var i=0; i<ids.length; i++) {
  inlist += '?,';
}
inlist = inlist.substring(0,inlist.length-1);

var sql = 'SELECT a, b, c FROM mytable WHERE id in (' + inlist + ')';

conn.query( sql, ids, function(err, rows) {
  . . .
})

#4

You simply need to pass the tagArray of values to node-mysql and it will handle the rest for you:

您只需要将tagArray值传递给node-mysql,它将为您处理其余的事情:

client.query(
    'SELECT tag_id FROM tag WHERE tag_name IN (?)',
    [tagArray],
    function(err, result, fields) {
        client.destroy();

        if (err) {
            throw err;
        }

        console.log(result);

        res.redirect('/');
    }
);

For more information, see the section in the manual for how different values are automatically escaped: https://github.com/mysqljs/mysql#escaping-query-values

有关更多信息,请参阅手册中有关如何自动转义不同值的部分:https://github.com/mysqljs/mysql#escaping-query-values

#5

-1

A working solution:

工作解决方案:

client.query(
    'SELECT tag_id FROM tag WHERE tag_name IN ?',
    [tagArray],
    function(err, result, fields) {
        client.destroy();

        if (err) {
            throw err;
        }

        console.log(result);

        res.redirect('/');
    }
);

No need to manually wrap tagArray in quotes. It is escaped by the mysql module.

无需手动将tagArray包装在引号中。它由mysql模块转义。

#1