> MIDAS does not seem to be consistent (or at least convenient) with how it
> handles booleans in AJAX functions.

MIDAS documentation does not say that arguments to "jset" (ODBSet) should be JSON-encoded:
https://midas.triumf.ca/MidasWiki/index.php/AJAX#jset

You found undocumented behavior.

As solution, we plan to replace "jset/ODBSet" with a JSON-RPC function, where all parameters will be JSON-encoded 
(obviously).

K.O.


> 
> When you request an ODB value that is a boolean with AJAX call like
> 
> http://neut14.triumf.ca:8081/?cmd=jcopy&odb=/Equipment/DCRC/Common/Hidden&format=json-nokeys
> 
> then you get
> 
> { "Hidden/last_written" : 1437065425, "Hidden" : false }
> 
> This seems correct, since the JSON convention has booleans encoded as true/false.
> 
> But this convention does not work when trying to set the boolean value. For instance
> 
> http://neut14.triumf.ca:8081/?cmd=jset&odb=/Equipment/DCRC/Common/Hidden&format=json-nokeys&value=true
> 
> does not set the variable to true. To make this work you need to use the
> characters y/n
> 
> http://neut14.triumf.ca:8081/?cmd=jset&odb=/Equipment/DCRC/Common/Hidden&format=json-nokeys&value=y
> 
> I tested this with ajax/jset, but the same problem seems to occur when using the
> javascript function ODBSet. The documentation doesn't say what sort of encoding
> to use when using these functions, so I guess the idea is that these functions
> use MIDAS encoding for booleans. But it seems to me that it would be more
> convenient if jset/ODBSet allowed the option to use json/javascript encoding for
> boolean values; or at least had that as a format option for jset/ODBSet.  That
> way my javascript could look like
> 
> var mybool = true;
> URI_command =
> "?cmd=jset&odb=/Equipment/DCRC/Common/Hidden&format=json-nokeys&value=" + mybool;
> 
> instead of
> 
> var mybool = true;
> URI_command = ""
> if(mybool){
>   URI_command =
> "?cmd=jset&odb=/Equipment/DCRC/Common/Hidden&format=json-nokeys&value=y";
> else
>   URI_command =
> "?cmd=jset&odb=/Equipment/DCRC/Common/Hidden&format=json-nokeys&value=n";
> 
> 
> __________________________________________________________
> Cross-posting from bitbucket issue tracker:
> 
> https://bitbucket.org/tmidas/midas/issues/29/jset-odbset-using-true-false-for-booleans