Update: actually it's not related to static fields. I've just tried to save a live template at http://vineyard.wikidot.com/settags:_template where the dataform doesn't have a static field and I get the same error screen. it worked late last night so something has broken dataforms this morning

I have forms running with static fields with no problems for me

There need to be a space after colon.

label: School

More information at:
Symfony doc - simple shortcut
YAML homepage - oficial specification

Wikidot's now checking Data Forms against the YAML standard, so things that might have worked before (but weren't 100% valid YAML) won't work now and would need to be updated slightly.

This is really bad: changing something that breaks existing forms with no warning at all. I (and everyone else who builds sites with dataforms) now have to go and check every single live template on every single site we've built. I am not at all pleased. It would have been courteous to have notified us of this.

I remember a discussion on the community forum a long time ago about whether the space was or was not required but as far as I recall there was nothing in the original documentation about it or anything ever said by Wikidot about it. So I will undoubtedly have dataforms with a mix of space and no-space, as will possibly a lot of other people.

First rule of IT software development: don't do something that breaks existing functionality! And if you do then give users a chance to do something about it over a period of time (as you did with IP addresses) rather than just break it. Didn't you realise what the effect would be?

And just pointing us to the YAML documentation is really unhelpful.

I'd better have a glass of wine to cool down or else there'll be a rant on Twitter this evening. You guys have got me really really cross.

In the documentation I wrote for dataforms I said:

"In order for the sort to work correctly, numbers below 10 must have a property of 01, 02, 03 etc. although the value can still be 1, 2, 3 etc as in the example data form field above. It is the value that is displayed in the ListPages module, as shown below. You must also make sure that there is no space between the colon and the value, i.e. it should be this 01:1 not 01: 1. This is critical where there are more than about 8 possible selections in your field."

So I guess sorting on numerical values is now broken and the documentation will need to be altered.

15 minutes so far trying to debug the first template (http://vineyard.wikidot.com/band:_template)!

Definitions like:

 current:
   label: Currently Recording
   type: select
   values:
     0: "Yes"
     1: "No"
  default: 0

Broken! Can't be saved.

Edit: It's the default: 0 than no longer works, the rest is OK. If we are using raw values what can we use instead of default: 0? I'll probably just leave it out altogether for now.

Just to confirm: the sorting on numerical values is now broken. http://vineyard.wikidot.com/bands:main

And if you have a select field of numerical values, e.g

 albums:
    label: Albums/CDs released
    type: select
    values:
      none: 0
      01: 1
      02: 2
      03: 3
      04: 4
      05: 5
      06: 6
      07: 7
      08: 8
      09: 9
      10: 10
      11: 11
      12: 12
      13: 13
      14: 14
      15: 15
      16: 16
      17: 17
      18: 18
      19: 19
      20: 20
      21: 21
      22: 22
      23: 23
      24: 24
      25: 25
      26: 26
      27: 27
      28: 28
      29: 29
      30: 30
      31: 31
      32: 32
      33: 33
      34: 34
      35: 35
      36: 36
      37: 37
      38: 38
      39: 39
      40: 40
      41: 41
      42: 42
      43: 43
      44: 44
      45: 45
      46: 46
      47: 47
      48: 48
      49: 49
      50: 50
      51: 51
      52: 52
      53: 53
      54: 54
      55: 55

When you edit the page the 8 is missing. James explained it was something to do with octals. It worked when the definition was 08:8 as I explained in a post above. But now it's all broken.

Please provide some syntax for this that not only shows the 8 when you edit the form but then works when used with sorting by the dataform value in a listpages module.