Knex（使用 Expressjs）和 postgresSQL：字符串在 SQL 中被 knex 自动双引号

Question

当我尝试使用 knex 在 SQL 中传递值时遇到问题。

app.get('/home/:topbarMenuPath', (req, res)=> {
  const { topbarMenuPath } = req.params;

  var toStringQuery =
  db.select('tm1.menu_name','tm1.seq','tm1.menu_path','tm1.menu_id')
  .from('tb_menu as tm1')
  .join('tb_menu as tm2', function() {
    this.on('tm1.parent_menu_id', '=', 'tm2.menu_id')
      .andOn('tm2.menu_level', '=', 1)
      .andOn('tm1.menu_level', '=', 2)
      .andOn('tm2.menu_path','=',topbarMenuPath)
  }).toString()
  ;
  console.log('toStringQuery',toStringQuery);
});

如果我将 ':topbarMenuPath' 作为 'hello' 传递，console.log 输出将如下所示：

select "tm1"."menu_name", "tm1"."seq", "tm1"."menu_path", "tm1"."menu_id" 
from "tb_menu" as "tm1" 
inner join "tb_menu" as "tm2" on "tm1"."parent_menu_id" = "tm2"."menu_id" 
and "tm2"."menu_level" = 1
and "tm1"."menu_level" = 2 
and "tm2"."menu_path" = "hello"

Postgres 似乎无法识别双引号“hello”，当我尝试将 SQL 发送到 Postgres 时显示错误。错误：

{
    "length": 166,
    "name": "error",
    "severity": "ERROR",
    "code": "42703",
    "position": "251",
    "file": "d:\pginstaller_12.auto\postgres.windows-x64\src\backend\parser\parse_relation.c",
    "line": "3359",
    "routine": "errorMissingColumn"
}

有什么方法可以让我得到一个 SQL 的单引号 hello ，如下所示？

and "tm2"."menu_path" = 'hello'

而不是

and "tm2"."menu_path" = "hello"

Answer 1

是的，来自the docs：

If you need to use a literal value (string, number, or boolean) in a join instead of a column, use knex.raw.

knex.select('*').from('users').join('accounts', 'accounts.type', knex.raw('?', ['admin']))
Outputs:
select * from `users` inner join `accounts` on `accounts`.`type` = 'admin'

对你来说，这意味着 .andOn('tm2.menu_path', '=', knex.raw('?', [topbarMenuPath]))

Knex（使用 Expressjs）和 postgresSQL：字符串在 SQL 中被 knex 自动双引号

Knex(with Expressjs) and postgresSQL: String is automatically double quoted in SQL by knex

postgresql

express

knex.js