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[OpenStack Infra <1981165@xxxxxxxxxxxxxxxxxx>]

Reviewed:  https://review.opendev.org/c/openstack/horizon/+/914838
Committed: https://opendev.org/openstack/horizon/commit/55e9db65282f124041dc66cfa0d51b2901db7c29
Submitter: "Zuul (22348)"
Branch:    master

commit 55e9db65282f124041dc66cfa0d51b2901db7c29
Author: flokots <florencekotohoyoh@xxxxxxxxx>
Date:   Tue Apr 2 03:04:35 2024 +0200

    Add help text for edit instance form
    
    This commit adds help text to the Edit Instance form to describe the
    limitations of the text allowed in the name and description. The help text guides the maximum length for the instance name and description
    and advises against using special characters or leading or trailing spaces. By providing this information, users will be better informed when modifying instance details, reducing the likelihood of
    encountering errors.
    
    Closes-Bug: #1981165
    Change-Id: If8879c20b2842c3dd769e4cdef80834219c637cd


** Changed in: horizon
       Status: In Progress => Fix Released

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https://bugs.launchpad.net/bugs/1981165

Title:
  Edit Instance - description box should not accept multi-line input

Status in OpenStack Dashboard (Horizon):
  Fix Released

Bug description:
  Currently, the text box for the Description is a multi-line text area.
  But if you try to enter more than one line it fails saying "Error:
  Unable to modify instance "name of instance".

  It turns out that the Nova / Nova client will reject any description
  that doesn't match a gnarly regex.  And newlines are rejected by that
  regex.  The error message you get from the CLI is like this:

  
  Invalid input for field/attribute description. Value: helloworld. 'hello\nworld' does not match '^[\\ -\\~\xa0-¬®-ͷͺ-Ϳ΄-ΊΌΎ-ΡΣ-ԯԱ-Ֆՙ-֊֍-֏-א-תׯ-״؆-؛؞-۞-܍ܐ-ݍ-ޱ߀-ߺ-࠰-࠾ࡀ-࡞ࡠ-ࡪࢠ-ࢴࢶ-ࢽ--ঃঅ-ঌএ-ঐও-নপ-রলশ-হ-ে-ৈো-ৎৗড়-ঢ়য়-০--ਃਅ-ਊਏ-ਐਓ-ਨਪ-ਰਲ-ਲ਼ਵ-ਸ਼ਸ-ਹਾ---ਖ਼-ੜਫ਼੦-੶-ઃઅ-ઍએ-ઑઓ-નપ-રલ-ળવ-હ--ૉો-ૐૠ-૦-૱ૹ--ଃଅ-ଌଏ-ଐଓ-ନପ-ରଲ-ଳଵ-ହ-େ-ୈୋ--ୗଡ଼-ଢ଼ୟ-୦-୷-ஃஅ-ஊஎ-ஐஒ-கங-சஜஞ-டண-தந-பம-ஹா-ூெ-ைொ-ௐௗ௦-௺-ఌఎ-ఐఒ-నప-హఽ-ౄ---ౘ-ౚౠ-౦-౯౷-ಌಎ-ಐಒ-ನಪ-ಳವ-ಹ-ೄ-ೈೊ-ೕ-ೖೞೠ-೦-೯ೱ-ೲ-ഃഅ-ഌഎ-ഐഒ-െ-ൈൊ-൏ൔ-൦-ൿං-ඃඅ-ඖක-නඳ-රලව-ෆා-ෘ-ෟ෦-෯ෲ-෴ก-฿-๛ກ-ຂຄຆ-ຊຌ-ຣລວ-ຽເ-ໄໆ-໐-໙ໜ-ໟༀ-ཇཉ-ཬ--྾-࿌࿎-࿚က-ჅჇჍა-ቈቊ-ቍቐ-ቖቘቚ-ቝበ-ኈኊ-ኍነ-ኰኲ-ኵኸ-ኾዀዂ-ዅወ-ዖዘ-ጐጒ-ጕጘ-ፚ-፼ᎀ-᎙Ꭰ-Ᏽᏸ-ᏽ᐀-᚜ᚠ-ᛸᜀ-ᜌᜎ-ᜠ-᜶ᝀ-ᝠ-ᝬᝮ-ᝰ-ក-០-៩៰-៹᠀-᠐-᠙ᠠ-ᡸᢀ-ᢪᢰ-ᣵᤀ-ᤞ-ᤫᤰ-᥀᥄-ᥭᥰ-ᥴᦀ-ᦫᦰ-ᧉ᧐-᧚᧞-᨞---᪉᪐-᪙᪠-᪭--ᭋ᭐-᭼-᯳᯼-᰻-᱉ᱍ-ᲈᲐ-ᲺᲽ-᳇-ᳺᴀ--ἕἘ-Ἕἠ-ὅὈ-Ὅὐ-ὗὙὛὝὟ-ώᾀ-ᾴᾶ-ῄῆ-ΐῖ-Ί῝-`ῲ-ῴῶ-῾\u2000-\u200a‐-‧\u202f-\u205f⁰-ⁱ⁴-₎ₐ-ₜ₠-₿-℀-↋←-␦⑀-⑊①-⭳⭶-⮕⮘-Ⱞⰰ-ⱞⱠ-ⳳ⳹-ⴥⴧⴭⴰ-ⵧⵯ-⵰-ⶖⶠ-ⶦⶨ-ⶮⶰ-ⶶⶸ-ⶾⷀ-ⷆⷈ-ⷎⷐ-ⷖⷘ-ⷞ-⹏⺀-⺙⺛-⻳⼀-⿕⿰-⿻\u3000-〿ぁ-ゖ-ヿㄅ-ㄯㄱ-ㆎ㆐-ㆺ㇀-㇣ㇰ-㈞㈠-䶵䷀-鿯ꀀ-ꒌ꒐-꓆ꓐ-ꘫꙀ-꛷꜀-ꞿꟂ-Ᶎꟷ-꠫꠰-꠹ꡀ-꡷ꢀ-꣎-꣙-꥓꥟-ꥼ-꧍ꧏ-꧙꧞-ꧾꨀ-ꩀ-ꩍ꩐-꩙꩜-ꫂꫛ-ꬁ-ꬆꬉ-ꬎꬑ-ꬖꬠ-ꬦꬨ-ꬮꬰ-ꭧꭰ-꯰-꯹가-힣--豈-舘並-龎ff-stﬓ-ﬗיִ-זּטּ-לּמּנּ-סּףּ-פּצּ-﯁ﯓ-﴿ﵐ-ﶏﶒ-ﷇﷰ-﷽-︙-﹒﹔-﹦﹨-﹫ﹰ-ﹴﹶ-ﻼ！-ﾾￂ-ￇￊ-ￏￒ-ￗￚ-ￜ￠-￦￨-￮-�]*$'

  ... which you would NOT want to show to an end user!

  Possible fixes for the problem would include:

  - Add help text to the Edit Instance form to describe the limitations on the text allowed in the Description.
  - Change the "look and feel" of the box to avoid giving the impression that multi-line descriptions are OK.
  - Change the UI to reject descriptions with bad characters ... before the get sent to nova / nova client
  - Detect the specific response message and translate it into a meaningful user error message; e.g. something like "Error: Description contains one or more unacceptable characters".

  At least the first one ... please.

  This syndrome may apply to other name, description and other text
  fields in the UI.  I didn't do looking for examples.

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