silent overflow of max character length for values

[dieterdreist]

I just coincidentally discovered that iD doesn't warn when you try to add long tags.

1. Added new tag (via copy+paste) image=http://www.sovraintendenzaroma.it/var/sovrintendenza/storage/images/i_luoghi/roma_antica/monumenti/cisterna_della_via_colombo/cisterna_della_via_colombo/cisterna_della_via_colombo_veduta_aerea/57816-1-ita-IT/cisterna_della_via_colombo_veduta_aerea_gallery.jpg and uploaded it. No error but the url is incomplete.

I became aware of the issue because I then tried to do it with the level0 editor and it replied:

OAuth error 400 at stage "upload": WayTag 66599244,image: v: is too long (maximum is 255 characters) ("http://www.sovraintendenzaroma.it/var/sovrintendenza/storage/images/i_luoghi/roma_antica/monumenti/cisterna_della_via_colombo/cisterna_della_via_colombo/cisterna_della_via_colombo_veduta_aerea/57816-1-ita-IT/cisterna_della_via_colombo_veduta_aerea_gallery.jpg").

I suggest to issue a similar warning in iD.

[mmd-osm]

No error but the url is incomplete.

Truncation already occurs when you paste your URL into iD's value field. The maximum length of 255 is checked by your browser. Level0 doesn't have this kind of validation, the message you were seeing is the error message returned by the OSM API.

[quincylvania]

It might be useful to have a tweet-like character count for certain fields if the value gets long. But I also wonder if the problem is common enough to spend time on.

[tyrasd]

As of v2.24 there is a max-length indicator and warning, see screenshot below. I believe this should sufficiently address the issue.