Create Diagram page from template doesn't work anymore

[CamiAndrei]

Up to version 1.15.1 there was the possibility to create a diagram with "Create" -> "Diagram"
From the version 1.15.2 the Diagram Template is not visible in the list.

Version 1.15.1

Version 1.15.2

[lucaa]

Actually, the issue was never fixed.
The change in 33b0e3e is actually only making the template available in the create forms of other paths on the wiki. However, as soon as the template is chosen , the path where the page is created changes to Diagram and setting it manually to something else does not work (there is error on creation mentioning a restriction) - which was not the behaviour on version 1.15.1 cited in the ticket.

For the actual fix: the easiest fix seems to be to add the "Use creation restrictions as suggestions" to the current settings, so that the Diagram space is only a suggestion but not a restriction. However, this would create the following interaction:

• when you click the Diagram template, the path is changed to Diagram
• at this point, the user can go and manually edit the path to replace Diagram with something else. This would work, it would allow the creation
  • if the user systematically wants the diagram pages to be subpages of their content pages, they need to do this everytime.
    • As opposed to other applications, in the case of the diagram application, this strategy for storage of application entries (spread in the content rather than all in the same space) is a very probable one, so creating a UI flow that is the opposite of this would be undesired.

This is not the behaviour we used to have before: before, you could just choose the Diagram template and the page was simply created in the current path. This is the desired behaviour, we should try to obtain this.

[oanalavinia]

Before the upgrade to 9.11 parent there was a small app that preselected the template #13 (diagram template was available on all spaces and the app made it preselected inside Diagram space), but it was removed since it's purpose was just to be a workaround for an issue with template provider on an older version.
But it seemed like the same behavior can't be achieved only from Template Provider.
So there are 2 choices:

1. use the suggestion of @lucaa to keep these changes + "Use creation restrictions as suggestions" , meaning that when you want to create a Diagram outside Diagram space, you have to manually change back the parent every time.
2. add back the Default Page Template Application for having the behavior prior to this issue

[lucaa]

use the suggestion of @lucaa to keep these changes + "Use creation restrictions as suggestions" , meaning that when you want to create a Diagram outside Diagram space, you have to manually change back the parent every time.

I don't understand, I specifically asked for that to not happen (having to change the parent back every time), so at least for me that's a -1.

[oanalavinia]

I just wanted to underline the fact that if we don't want the outcome of the fix that you suggested, the only fix is to add back the dependency to Default Page Template Application. (until there is a way to specify from Template Provider the spaces where you want the template to be preselected)

[oanalavinia]

I added back the dependency to application-defaultPageTemplate to avoid any side effects