Template validation

[Yurij Molchanov]

Is it possible to make template validation before creating actual report?

[Jurriaan Barkey Wolf]

The commands in the template are arbitrary JavaScript, so you cannot really validate them without executing the entire template. At least i havent found a convenient way to do so.

To validate user-created templates in my desktop app I just execute them and present any errors that occur to the user. Note that you should be aware of the security concerns related to untrusted/user-generated templates, but that's a different topic.

[Yurij Molchanov]

Maybe there is a way check template syntax?
I mean to check if commands

+++ QUERI { data { title, description }} +++
    ^^^^^
Error: Syntax error near 1:1. Unknown identifier "QUERI"

are written in the right way but skip values accessing

[Jurriaan Barkey Wolf]

You can use listCommands to get a list of all the commands, but you'll have to parse and validate them using your own custom validation routine.

But still, the only 100% sure way to validate template correctness is by running the code in the template commands, that's the downside of allowing JavaScript in the templates.