2020-06-13 00:36:45 +02:00
<!DOCTYPE html>
2020-10-15 01:31:30 +02:00
< html >
2020-06-15 21:52:33 +02:00
< head >
< meta charset = "utf-8" / >
2021-05-16 00:06:01 +02:00
< meta name = "viewport" content = "width=device-width, initial-scale=1.0" / > < meta name = "generator" content = "Docutils 0.17.1: http://docutils.sourceforge.net/" / >
2020-06-15 21:52:33 +02:00
< title > Default Exit Errors — Evennia 1.0-dev documentation< / title >
2020-07-14 00:21:00 +02:00
< link rel = "stylesheet" href = "../_static/nature.css" type = "text/css" / >
< link rel = "stylesheet" href = "../_static/pygments.css" type = "text/css" / >
< script id = "documentation_options" data-url_root = "../" src = "../_static/documentation_options.js" > < / script >
< script src = "../_static/jquery.js" > < / script >
< script src = "../_static/underscore.js" > < / script >
< script src = "../_static/doctools.js" > < / script >
< script src = "../_static/language_data.js" > < / script >
< link rel = "shortcut icon" href = "../_static/favicon.ico" / >
< link rel = "index" title = "Index" href = "../genindex.html" / >
2022-02-06 18:34:09 +00:00
< link rel = "search" title = "Search" href = "../search.html" / >
< link rel = "next" title = "Manually Configuring Color" href = "Manually-Configuring-Color.html" / >
< link rel = "prev" title = "Command Duration" href = "Command-Duration.html" / >
2020-06-15 21:52:33 +02:00
< / head > < body >
< div class = "related" role = "navigation" aria-label = "related navigation" >
< h3 > Navigation< / h3 >
< ul >
< li class = "right" style = "margin-right: 10px" >
2020-07-14 00:21:00 +02:00
< a href = "../genindex.html" title = "General Index"
2020-06-15 21:52:33 +02:00
accesskey="I">index< / a > < / li >
< li class = "right" >
2020-07-14 00:21:00 +02:00
< a href = "../py-modindex.html" title = "Python Module Index"
2020-06-15 21:52:33 +02:00
>modules< / a > |< / li >
2022-02-06 18:34:09 +00:00
< li class = "right" >
< a href = "Manually-Configuring-Color.html" title = "Manually Configuring Color"
accesskey="N">next< / a > |< / li >
< li class = "right" >
< a href = "Command-Duration.html" title = "Command Duration"
accesskey="P">previous< / a > |< / li >
2020-10-15 01:31:30 +02:00
< li class = "nav-item nav-item-0" > < a href = "../index.html" > Evennia 1.0-dev< / a > » < / li >
2022-02-06 18:34:09 +00:00
< li class = "nav-item nav-item-1" > < a href = "Howtos-Overview.html" accesskey = "U" > Tutorials and Howto’ < / a > » < / li >
2020-10-15 01:31:30 +02:00
< li class = "nav-item nav-item-this" > < a href = "" > Default Exit Errors< / a > < / li >
2020-06-15 21:52:33 +02:00
< / ul >
2021-06-23 18:58:26 +02:00
< div class = "develop" > develop branch< / div >
2020-06-15 21:52:33 +02:00
< / div >
< div class = "document" >
< div class = "documentwrapper" >
< div class = "bodywrapper" >
< div class = "body" role = "main" >
2020-06-13 00:36:45 +02:00
2021-10-26 21:41:11 +02:00
< section class = "tex2jax_ignore mathjax_ignore" id = "default-exit-errors" >
2020-06-13 00:36:45 +02:00
< h1 > Default Exit Errors< a class = "headerlink" href = "#default-exit-errors" title = "Permalink to this headline" > ¶< / a > < / h1 >
2022-02-06 18:34:09 +00:00
< p > Evennia allows for exits to have any name. The command “kitchen” is a valid exit name as well as “jump out the window”
or “north”. An exit actually consists of two parts: an < a class = "reference internal" href = "../Components/Objects.html" > < span class = "doc std std-doc" > Exit Object< / span > < / a > and
an < a class = "reference internal" href = "../Components/Commands.html" > < span class = "doc std std-doc" > Exit Command< / span > < / a > stored on said exit object. The command has the same key and aliases as the
exit-object, which is why you can see the exit in the room and just write its name to traverse it.< / p >
< p > So if you try to enter the name of a non-existing exit, Evennia treats is the same way as if you were trying to
use a non-existing command:< / p >
2021-10-26 21:41:11 +02:00
< div class = "highlight-none notranslate" > < div class = "highlight" > < pre > < span > < / span > > jump out the window
Command ' jump out the window' is not available. Type " help" for help.
2020-06-13 00:36:45 +02:00
< / pre > < / div >
< / div >
2022-02-06 18:34:09 +00:00
< p > Many games don’
Evennia’ < code class = "docutils literal notranslate" > < span class = "pre" > tunnel< / span > < / code > command also offers this functionality). In this case, the error starts to look less logical:< / p >
2021-10-26 21:41:11 +02:00
< div class = "highlight-none notranslate" > < div class = "highlight" > < pre > < span > < / span > > west
2022-02-06 18:34:09 +00:00
Command ' west' is not available. Maybe you meant " set" or " reset" ?
< / pre > < / div >
< / div >
< p > Since we for our particular game < em > know< / em > that west is an exit direction, it would be better if the error message just
told us that we couldn’ < / p >
< div class = "highlight-none notranslate" > < div class = "highlight" > < pre > < span > < / span > > west
You cannot move west.
2020-06-13 00:36:45 +02:00
< / pre > < / div >
< / div >
2021-05-16 00:06:01 +02:00
< section id = "adding-default-error-commands" >
2020-06-13 00:36:45 +02:00
< h2 > Adding default error commands< a class = "headerlink" href = "#adding-default-error-commands" title = "Permalink to this headline" > ¶< / a > < / h2 >
2022-02-06 18:34:09 +00:00
< p > The way to do this is to give Evennia an < em > alternative< / em > Command to use when no Exit-Command is found
in the room. See < a class = "reference internal" href = "Beginner-Tutorial/Part1/Adding-Commands.html" > < span class = "doc std std-doc" > Adding Commands< / span > < / a > for more info about the
process of adding new Commands to Evennia.< / p >
< p > In this example all we’ < / p >
2021-10-26 21:41:11 +02:00
< div class = "highlight-python notranslate" > < div class = "highlight" > < pre > < span > < / span > < span class = "c1" > # for example in a file mygame/commands/movecommands.py< / span >
2020-06-13 00:36:45 +02:00
2022-02-06 18:34:09 +00:00
< span class = "kn" > from< / span > < span class = "nn" > evennia< / span > < span class = "kn" > import< / span > < span class = "n" > default_cmds< / span > < span class = "p" > ,< / span > < span class = "n" > CmdSet< / span >
2020-06-13 00:36:45 +02:00
< span class = "k" > class< / span > < span class = "nc" > CmdExitError< / span > < span class = "p" > (< / span > < span class = "n" > default_cmds< / span > < span class = "o" > .< / span > < span class = "n" > MuxCommand< / span > < span class = "p" > ):< / span >
2022-02-06 18:34:09 +00:00
< span class = "sd" > " " " Parent class for all exit-errors." " " < / span >
2020-06-13 00:36:45 +02:00
< span class = "n" > locks< / span > < span class = "o" > =< / span > < span class = "s2" > " cmd:all()" < / span >
< span class = "n" > arg_regex< / span > < span class = "o" > =< / span > < span class = "sa" > r< / span > < span class = "s2" > " \s|$" < / span >
2020-12-20 14:36:24 +01:00
< span class = "n" > auto_help< / span > < span class = "o" > =< / span > < span class = "kc" > False< / span >
2020-06-13 00:36:45 +02:00
< span class = "k" > def< / span > < span class = "nf" > func< / span > < span class = "p" > (< / span > < span class = "bp" > self< / span > < span class = "p" > ):< / span >
2022-02-06 18:34:09 +00:00
< span class = "sd" > " " " Returns error based on key" " " < / span >
< span class = "bp" > self< / span > < span class = "o" > .< / span > < span class = "n" > caller< / span > < span class = "o" > .< / span > < span class = "n" > msg< / span > < span class = "p" > (< / span > < span class = "sa" > f< / span > < span class = "s2" > " You cannot move < / span > < span class = "si" > {< / span > < span class = "bp" > self< / span > < span class = "o" > .< / span > < span class = "n" > key< / span > < span class = "si" > }< / span > < span class = "s2" > ." < / span > < span class = "p" > )< / span >
2020-06-13 00:36:45 +02:00
< span class = "k" > class< / span > < span class = "nc" > CmdExitErrorNorth< / span > < span class = "p" > (< / span > < span class = "n" > CmdExitError< / span > < span class = "p" > ):< / span >
< span class = "n" > key< / span > < span class = "o" > =< / span > < span class = "s2" > " north" < / span >
< span class = "n" > aliases< / span > < span class = "o" > =< / span > < span class = "p" > [< / span > < span class = "s2" > " n" < / span > < span class = "p" > ]< / span >
< span class = "k" > class< / span > < span class = "nc" > CmdExitErrorEast< / span > < span class = "p" > (< / span > < span class = "n" > CmdExitError< / span > < span class = "p" > ):< / span >
< span class = "n" > key< / span > < span class = "o" > =< / span > < span class = "s2" > " east" < / span >
< span class = "n" > aliases< / span > < span class = "o" > =< / span > < span class = "p" > [< / span > < span class = "s2" > " e" < / span > < span class = "p" > ]< / span >
< span class = "k" > class< / span > < span class = "nc" > CmdExitErrorSouth< / span > < span class = "p" > (< / span > < span class = "n" > CmdExitError< / span > < span class = "p" > ):< / span >
< span class = "n" > key< / span > < span class = "o" > =< / span > < span class = "s2" > " south" < / span >
< span class = "n" > aliases< / span > < span class = "o" > =< / span > < span class = "p" > [< / span > < span class = "s2" > " s" < / span > < span class = "p" > ]< / span >
< span class = "k" > class< / span > < span class = "nc" > CmdExitErrorWest< / span > < span class = "p" > (< / span > < span class = "n" > CmdExitError< / span > < span class = "p" > ):< / span >
< span class = "n" > key< / span > < span class = "o" > =< / span > < span class = "s2" > " west" < / span >
< span class = "n" > aliases< / span > < span class = "o" > =< / span > < span class = "p" > [< / span > < span class = "s2" > " w" < / span > < span class = "p" > ]< / span >
2022-02-06 18:34:09 +00:00
< span class = "c1" > # you could add each command on its own to the default cmdset,< / span >
< span class = "c1" > # but putting them all in a cmdset here allows you to< / span >
< span class = "c1" > # just add this and makes it easier to expand with more < / span >
< span class = "c1" > # exit-errors in the future< / span >
< span class = "k" > class< / span > < span class = "nc" > MovementFailCmdSet< / span > < span class = "p" > (< / span > < span class = "n" > CmdSet< / span > < span class = "p" > ):< / span >
< span class = "k" > def< / span > < span class = "nf" > at_cmdset_creation< / span > < span class = "p" > (< / span > < span class = "bp" > self< / span > < span class = "p" > ):< / span >
< span class = "bp" > self< / span > < span class = "o" > .< / span > < span class = "n" > add< / span > < span class = "p" > (< / span > < span class = "n" > CmdExitErrorNorth< / span > < span class = "p" > ())< / span >
< span class = "bp" > self< / span > < span class = "o" > .< / span > < span class = "n" > add< / span > < span class = "p" > (< / span > < span class = "n" > CmdExitErrorEast< / span > < span class = "p" > ())< / span >
< span class = "bp" > self< / span > < span class = "o" > .< / span > < span class = "n" > add< / span > < span class = "p" > (< / span > < span class = "n" > CmdExitErrorWest< / span > < span class = "p" > ())< / span >
< span class = "bp" > self< / span > < span class = "o" > .< / span > < span class = "n" > add< / span > < span class = "p" > (< / span > < span class = "n" > CmdExitErrorSouth< / span > < span class = "p" > ())< / span >
2020-06-13 00:36:45 +02:00
< / pre > < / div >
2021-10-26 21:41:11 +02:00
< / div >
2022-02-06 18:34:09 +00:00
< p > We pack our commands in a new little cmdset; if we add this to our
< code class = "docutils literal notranslate" > < span class = "pre" > CharacterCmdSet< / span > < / code > , we can just add more errors to < code class = "docutils literal notranslate" > < span class = "pre" > MovementFailCmdSet< / span > < / code >
later without having to change code in two places.< / p >
2021-10-26 21:41:11 +02:00
< div class = "highlight-python notranslate" > < div class = "highlight" > < pre > < span > < / span > < span class = "c1" > # in mygame/commands/default_cmdsets.py< / span >
2020-06-13 00:36:45 +02:00
< span class = "kn" > from< / span > < span class = "nn" > commands< / span > < span class = "kn" > import< / span > < span class = "n" > movecommands< / span >
< span class = "c1" > # [...]< / span >
< span class = "k" > class< / span > < span class = "nc" > CharacterCmdSet< / span > < span class = "p" > (< / span > < span class = "n" > default_cmds< / span > < span class = "o" > .< / span > < span class = "n" > CharacterCmdSet< / span > < span class = "p" > ):< / span >
< span class = "c1" > # [...]< / span >
< span class = "k" > def< / span > < span class = "nf" > at_cmdset_creation< / span > < span class = "p" > (< / span > < span class = "bp" > self< / span > < span class = "p" > ):< / span >
< span class = "c1" > # [...]< / span >
2022-02-06 18:34:09 +00:00
< span class = "c1" > # this adds all the commands at once< / span >
< span class = "bp" > self< / span > < span class = "o" > .< / span > < span class = "n" > add< / span > < span class = "p" > (< / span > < span class = "n" > movecommands< / span > < span class = "o" > .< / span > < span class = "n" > MovementFailCmdSet< / span > < span class = "p" > )< / span >
2020-06-13 00:36:45 +02:00
< / pre > < / div >
2021-10-26 21:41:11 +02:00
< / div >
2022-02-06 18:34:09 +00:00
< p > < code class = "docutils literal notranslate" > < span class = "pre" > reload< / span > < / code > the server. What happens henceforth is that if you are in a room with an Exitobject (let’ ’
the proper Exit-command will < em > overload< / em > your error command (also named “north”). But if you enter a direction without
having a matching exit for it, you will fall back to your default error commands:< / p >
2021-10-26 21:41:11 +02:00
< div class = "highlight-none notranslate" > < div class = "highlight" > < pre > < span > < / span > > east
You cannot move east.
2020-06-13 00:36:45 +02:00
< / pre > < / div >
< / div >
2022-02-06 18:34:09 +00:00
< p > Further expansions by the exit system (including manipulating the way the Exit command itself is created) can be done by
modifying the < a class = "reference internal" href = "../Components/Typeclasses.html" > < span class = "doc std std-doc" > Exit typeclass< / span > < / a > directly.< / p >
2021-05-16 00:06:01 +02:00
< / section >
2022-02-06 18:34:09 +00:00
< section id = "why-not-a-single-command" >
< h2 > Why not a single command?< a class = "headerlink" href = "#why-not-a-single-command" title = "Permalink to this headline" > ¶< / a > < / h2 >
2020-06-13 00:36:45 +02:00
< p > So why didn’ < / p >
2022-02-06 18:34:09 +00:00
< div class = "highlight-python notranslate" > < div class = "highlight" > < pre > < span > < / span > < span class = "k" > class< / span > < span class = "nc" > CmdExitError< / span > < span class = "p" > (< / span > < span class = "n" > default_cmds< / span > < span class = "o" > .< / span > < span class = "n" > MuxCommand< / span > < span class = "p" > ):< / span >
< span class = "s2" > " Handles all exit-errors." < / span >
< span class = "n" > key< / span > < span class = "o" > =< / span > < span class = "s2" > " error_cmd" < / span >
< span class = "n" > aliases< / span > < span class = "o" > =< / span > < span class = "p" > [< / span > < span class = "s2" > " north" < / span > < span class = "p" > ,< / span > < span class = "s2" > " n" < / span > < span class = "p" > ,< / span >
< span class = "s2" > " east" < / span > < span class = "p" > ,< / span > < span class = "s2" > " e" < / span > < span class = "p" > ,< / span >
< span class = "s2" > " south" < / span > < span class = "p" > ,< / span > < span class = "s2" > " s" < / span > < span class = "p" > ,< / span >
< span class = "s2" > " west" < / span > < span class = "p" > ,< / span > < span class = "s2" > " w" < / span > < span class = "p" > ]< / span >
< span class = "c1" > #[...]< / span >
2020-06-13 00:36:45 +02:00
< / pre > < / div >
2021-10-26 21:41:11 +02:00
< / div >
2022-02-06 18:34:09 +00:00
< p > The reason is that this would < em > not< / em > work. Understanding why is important.< / p >
< p > Evennia’ < a class = "reference internal" href = "../Components/Commands.html" > < span class = "doc std std-doc" > command system< / span > < / a > compares commands by key and/or aliases. If < em > any< / em > key or alias
match, the two commands are considered < em > identical< / em > . When the cmdsets merge, priority will then decide which of these
‘ ’ < / p >
< p > So the above example would work fine as long as there were < em > no Exits at all< / em > in the room. But when we enter
a room with an exit “north”, its Exit-command (which has a higher priority) will override the single < code class = "docutils literal notranslate" > < span class = "pre" > CmdExitError< / span > < / code >
with its alias ‘ ’ < code class = "docutils literal notranslate" > < span class = "pre" > CmdExitError< / span > < / code > will be gone and while “north” will work, we’
“Command not recognized” error for the other directions.< / p >
2021-05-16 00:06:01 +02:00
< / section >
< / section >
2020-06-13 00:36:45 +02:00
2020-10-15 01:31:30 +02:00
< div class = "clearer" > < / div >
2020-06-13 00:36:45 +02:00
< / div >
< / div >
< / div >
2020-06-15 21:52:33 +02:00
< div class = "sphinxsidebar" role = "navigation" aria-label = "main navigation" >
< div class = "sphinxsidebarwrapper" >
2020-07-14 00:21:00 +02:00
< p class = "logo" > < a href = "../index.html" >
< img class = "logo" src = "../_static/evennia_logo.png" alt = "Logo" / >
2020-06-15 21:52:33 +02:00
< / a > < / p >
< div id = "searchbox" style = "display: none" role = "search" >
< h3 id = "searchlabel" > Quick search< / h3 >
< div class = "searchformwrapper" >
2020-07-14 00:21:00 +02:00
< form class = "search" action = "../search.html" method = "get" >
2020-06-15 21:52:33 +02:00
< input type = "text" name = "q" aria-labelledby = "searchlabel" / >
< input type = "submit" value = "Go" / >
< / form >
< / div >
< / div >
< script > $ ( '#searchbox' ) . show ( 0 ) ; < / script >
2020-07-14 00:21:00 +02:00
< p > < h3 > < a href = "../index.html" > Table of Contents< / a > < / h3 >
2020-06-15 21:52:33 +02:00
< ul >
< li > < a class = "reference internal" href = "#" > Default Exit Errors< / a > < ul >
< li > < a class = "reference internal" href = "#adding-default-error-commands" > Adding default error commands< / a > < / li >
2022-02-06 18:34:09 +00:00
< li > < a class = "reference internal" href = "#why-not-a-single-command" > Why not a single command?< / a > < / li >
2020-06-15 21:52:33 +02:00
< / ul >
< / li >
< / ul >
2020-06-13 00:36:45 +02:00
2022-02-06 18:34:09 +00:00
< h4 > Previous topic< / h4 >
< p class = "topless" > < a href = "Command-Duration.html"
title="previous chapter">Command Duration< / a > < / p >
< h4 > Next topic< / h4 >
< p class = "topless" > < a href = "Manually-Configuring-Color.html"
title="next chapter">Manually Configuring Color< / a > < / p >
2020-06-15 21:52:33 +02:00
< div role = "note" aria-label = "source link" >
<!-- h3>This Page</h3 -->
< ul class = "this-page-menu" >
2022-02-06 18:34:09 +00:00
< li > < a href = "../_sources/Howtos/Default-Exit-Errors.md.txt"
2020-06-15 21:52:33 +02:00
rel="nofollow">Show Page Source< / a > < / li >
< / ul >
2021-03-06 01:37:43 +01:00
< / div > < h3 > Links< / h3 >
< ul >
< li > < a href = "https://www.evennia.com" > Home page< / a > < / li >
< li > < a href = "https://github.com/evennia/evennia" > Evennia Github< / a > < / li >
< li > < a href = "http://games.evennia.com" > Game Index< / a > < / li >
2021-08-06 00:47:51 +02:00
< li >
< a href = "https://discord.gg/AJJpcRUhtF" > Discord< / a > -
< a href = "https://github.com/evennia/evennia/discussions" > Discussions< / a > -
2021-08-06 00:53:44 +02:00
< a href = "https://evennia.blogspot.com/" > Blog< / a >
2021-03-06 01:37:43 +01:00
< / li >
< / ul >
2020-06-15 21:52:33 +02:00
< h3 > Versions< / h3 >
< ul >
< li > < a href = "Default-Exit-Errors.html" > 1.0-dev (develop branch)< / a > < / li >
2022-02-05 18:41:59 +00:00
< li > < a href = "../../0.9.5/index.html" > 0.9.5 (v0.9.5 branch)< / a > < / li >
2020-06-15 21:52:33 +02:00
< / ul >
2020-06-14 21:48:02 +02:00
2020-06-15 21:52:33 +02:00
< / div >
< / div >
< div class = "clearer" > < / div >
< / div >
< div class = "related" role = "navigation" aria-label = "related navigation" >
< h3 > Navigation< / h3 >
< ul >
< li class = "right" style = "margin-right: 10px" >
2020-07-14 00:21:00 +02:00
< a href = "../genindex.html" title = "General Index"
2020-06-15 21:52:33 +02:00
>index< / a > < / li >
< li class = "right" >
2020-07-14 00:21:00 +02:00
< a href = "../py-modindex.html" title = "Python Module Index"
2020-06-15 21:52:33 +02:00
>modules< / a > |< / li >
2022-02-06 18:34:09 +00:00
< li class = "right" >
< a href = "Manually-Configuring-Color.html" title = "Manually Configuring Color"
>next< / a > |< / li >
< li class = "right" >
< a href = "Command-Duration.html" title = "Command Duration"
>previous< / a > |< / li >
2020-10-15 01:31:30 +02:00
< li class = "nav-item nav-item-0" > < a href = "../index.html" > Evennia 1.0-dev< / a > » < / li >
2022-02-06 18:34:09 +00:00
< li class = "nav-item nav-item-1" > < a href = "Howtos-Overview.html" > Tutorials and Howto’ < / a > » < / li >
2020-10-15 01:31:30 +02:00
< li class = "nav-item nav-item-this" > < a href = "" > Default Exit Errors< / a > < / li >
2020-06-15 21:52:33 +02:00
< / ul >
2021-06-23 18:58:26 +02:00
< div class = "develop" > develop branch< / div >
2020-06-15 21:52:33 +02:00
< / div >
< div class = "footer" role = "contentinfo" >
© Copyright 2020, The Evennia developer community.
2020-10-15 01:31:30 +02:00
Created using < a href = "https://www.sphinx-doc.org/" > Sphinx< / a > 3.2.1.
2020-06-15 21:52:33 +02:00
< / div >
< / body >
2020-06-13 00:36:45 +02:00
< / html >
