[rt-users] adding custom field type, how to force single value

[Kevin Falcone]

On Tue, Jun 17, 2014 at 04:08:54PM -0400, Len Jaffe wrote:
> In order make sure that we're solving the correct problem, since my previous
> post was terse, and I'm not sure whether I used all the right key words, please
> allow me to elaborate:
> 
> Based on a similar treatment by a colleague, I have created local/html/Elements
> /CustomField_Local.pm

That is not the right place for a Foo_Local.pm, they go in
local/lib/RT/

> The I created local/html/Elements/EditCustomFieldJSON_Encoded_Resource_Field
> and  local/html/Elements/ShowCustomFieldJSON_Encoded_Resource_Field
> 
> Which do what I need them to - pretty print the JSON so a human can read it and
> edit it if necessary.
> 
> But RT thinks this custom field type allows multiple entries per field, and so
> pukes all over the pretty-printed JSON.
> 
> When I use a straight "Fill in one text area" RT is ok with the JSON, but the
> JSON is not pretty printed.

In that case, you could use Fill in one text area for editing and just
override display using the callbacks in ShowCustomField based on the
CF name.

Otherwise, look into the MaxValues setting.

-kevin
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