通过使用jboss-cli，我试图将数据源的connection-url从一个配置文件复制到另一个配置文件。
这样做的目的是构建一个脚本，允许第三方部署我们的应用程序，而不需要事先知道正在使用的数据库。connection-url只是我们需要复制的值之一。
当然，我可以用这个来读取源URL

/profile=financials/subsystem=datasources/data-source=coda:read-attribute(name=connection-url)

我可以把这个值赋给一个变量（注意反引号的使用）

set db_url=`/profile=financials/subsystem=datasources/data-source=coda:read-attribute(name=connection-url)`

并成功地将该变量的内容作为字符串查看

echo $db_url

但是，当我尝试使用变量写入另一个配置文件时，就像这样

/profile=millennium/subsystem=datasources/data-source=coda:write-attribute(name=connection-url,value=$db_url)

我得到这个错误：应为[EXPRESSION，STRING]，但为OBJECT”

{
    "outcome" => "failed",
    "failure-description" => {"domain-failure-description" => "WFLYCTL0097: Wrong type for 'connection-url'. Expected [EXPRESSION, STRING] but was OBJECT"}
,
    "rolled-back" => true
}

所以问题也可能是这样的：如何在jboss-cli中将对象转换为字符串？
非常感谢如果你能帮助！
编辑：我们正在使用Wildfly版本23。
编辑
我想补充的是，我已经尝试了这里解释的例子的每一个（我认为）排列：http://www.mastertheboss.com/jbossas/jboss-script/advanced-wildfly-cli-variables-and-aliases/

Using variables to set attributes
You can also use variables to set values of your configuration. Let’s see an example:

[standalone@localhost:9990 /] set MYVAR=foo
[standalone@localhost:9990 /] /system-property=test:add(value="${MYVAR}")
However, the above command fails with:

{
    "outcome" => "failed",
    "failure-description" => "WFLYCTL0211: Cannot resolve expression '${MYVAR}'",
    "rolled-back" => true
}
That’s because you need to use a different format in your CLI to set values with variables. You need to include a colon (“:”) when setting attributes. That also allows setting a default value. The following will work:

/system-property=test:add(value="${MYVAR:}")
Finally, here is how to allow a default value for your variable:

/system-property=test:add(value="${MYVAR:default}")