问题
In my configuration, I try the next comand (BD mysql):
SELECT user, name, lastname FROM Cordloc
where user=<sql:param type="xs:string" select="/form/section-1/usuario"/>
This database service is conect to drowpdown, but when I incluye the sentence "where user=<sql:param type="xs:string" select="/form/section-1/usuario"/>",
this it's not working.
I try the show en drowdown name user, but filter with user login orbeon (in the table is same value "orbeon").
Please, can your help me with that.
Many thanks.
回答1:
You can't use an XPath expression, such as /form/section-1/usuario, in the query. Instead, the value of the select attribute must be left empty (as mentioned in 1. Set a service parameter).
Instead, you "feed" the value to the service from the action. In the Actions Editor, under Set Database Service Parameters, you can say that the value from a given field should be used for a parameter of your SQL query.
来源：https://stackoverflow.com/questions/43812144/extract-value-from-form-and-send-to-database-service-how-a-parameter-filter