使用 mule 4 在在线数据库中创建记录时邮递员出现乱码

Question

我正在使用 phpmyadmin 在线数据库。我已经应用 client_id 和 client_secret API 管理器安全并部署到 cloudhub。

最初，我能够获取或更新数据库中的数据，但在部署到 cloudhub 后，运行在邮递员中出现以下错误。

它是一个 put 方法，有 body { “资源”： { “客户编号”：“5”， “姓名”：“山姆”

},
"destination":{
    "CustomerId" : "4",
    "Name" : "Jassie"
}

}

这是设置为变量的查询。 "SELECT CustomerId,Country FROM Customers WHERE CustomerId IN " ++ "(" ++ "'" ++ payload.source.CustomerId ++ "'" ++ "," ++ "'" ++ payload.destination.CustomerId ++ "'" ++ ")"

{ "message": ""org.mule.weave.v2.exception.UnexpectedFunctionCallTypesException: 你用这些参数调用了函数 '++': \n 1: String ("SELECT CustomerId,Country FROM Customers WHERE CustomerId IN ('")\n 2: Null (null)\n\nBut 它需要以下组合之一：\n (Array, Array)\n (Date, Time)\n (Date, LocalTime)\n (Date,时区)\n (LocalDateTime, TimeZone)\n (LocalTime, Date)\n (LocalTime, TimeZone)\n (Object, Object)\n (String, String)\n (Time, Date)\n (TimeZone, LocalDateTime )\n (TimeZone, Date)\n (TimeZone, LocalTime)\n\n6| "SELECT CustomerId,Country FROM Customers WHERE CustomerId IN " ++ "(" ++ "'" ++ payload.source.CustomerId++ "'" ++ "," ++ "'" ++ payload.destination.CustomerId++ "'" ++ ")"\n ^^^^^^^^^^^^^ ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^\n跟踪：\n 在 ++（行：6 , 列: 1)\n at ++ (line: 6, column: 75)\n at ++ (line: 6, column: 103)\n at ++ (line: 6, column: 110)\n at ++ (line: 6, column: 117)\n at ++ (line: 6, column: 124)\n at ++ (line: 6, column: 157)\n at main (line: 6, col umn: 164)\n" 计算表达式: "%dw 2.0\noutput application/java\n---\n//"(" ++ "'" ++ payload.source.CustomerId++ " '" ++ "," ++ "'" ++ payload.destination.CustomerId++ "'" ++ ")"\n\n"SELECT CustomerId,Country FROM Customers WHERE CustomerId IN " + + "(" ++ "'" ++ payload.source.CustomerId++ "'" ++ "," ++ "'" ++ payload.destination.CustomerId++ "'" ++ ")""。 “ }

Answer 1

从问题来看，您似乎正在尝试从 CustomerId 构造查询，该查询可以包装在源或目标中。您的代码有一些 null "" 值，这在连接时是不可接受的。

以下是我将如何通过导入字符串模块构建 DW。

%dw 2.0
import unwrap from dw::core::Strings
output application/java
---
"SELECT CustomerId,Country FROM Customers WHERE CustomerId IN " ++ "(" ++ unwrap(write(payload..CustomerId  , "application/json", {"indent": false}), "")  ++ ")"

这是示例请求和响应。

Answer 2

你可以试试这个...

%dw 2.0
output application/json
---
"SELECT CustomerId,Country FROM Customers WHERE CustomerId IN ('" ++ 
(payload.source.CustomerId as String default "")++ "', '" ++ 
(payload.destination.CustomerId as String default "") ++ "')"

使用输出 application/java 或 application/json 取决于您将使用它的功能。您面临的错误可能是由于您发送的空值所致。将其默认为 "" 将避免 dataWeave 失败。

此外，始终尝试将尽可能多的硬编码字符串值组合在一对 "" 中。

使用 mule 4 在在线数据库中创建记录时邮递员出现乱码

Getting gibberish in postman when creating records in online database with mule 4

database

phpmyadmin

dataweave

mule4