[PATCH]: javascript TypeError when changing ticket type

[Cinc-th]

The javascript error TypeError is triggered when changing ticket types while the description field is not empty and no template is defined.

Configuration

The following ticket types are defined:

• defect
• task
• foo
• ...

Only for type foo a template is defined.

Browser: Firefox 50.0

How to trigger the problem:

1. Create a new ticket, it defaults to defect
2. Enter something into the description field
3. Change the ticket type from defect to task

On the javascript console of your browser the following error is shown

TypeError: _tracticketstencil[prev_type] is undefined ticketstencil.js:8:1

and subsequent jacascript code is not executed.

Patch

1. The patch makes sure that for every ticket type a default description is defined in the array _tracticketstencil[] thus _tracticketstencil[prev_type].trim().replace(/\r\n/g, "\n") can be calculated.

1. In addition it ensures the data attribute is always set.

1. It defines a default for prev_type in case the data attribute is lost. This one is probably superfluous because of the former changes but it doesn't hurt.

[Cinc-th]

Fix for TypeError during javascript execution when changing ticket types.

[tkob-trac]

In 15982:

Apply a patch from Cinc-th to avoid TypeError in JS, closes #12957

[anonymous]

Thank you!