From 3ae26c8a547b82a37da8e3c46ea61ae0893c301e Mon Sep 17 00:00:00 2001
From: firest <enlanubo@gmail.com>
Date: Thu, 6 Jun 2024 16:42:43 +0800
Subject: [PATCH] chore: update changes

---
 .../src/emqx_authz_api_mnesia.erl                | 16 ++--------------
 changes/ce/fix-13196.en.md                       |  1 +
 2 files changed, 3 insertions(+), 14 deletions(-)
 create mode 100644 changes/ce/fix-13196.en.md

diff --git a/apps/emqx_auth_mnesia/src/emqx_authz_api_mnesia.erl b/apps/emqx_auth_mnesia/src/emqx_authz_api_mnesia.erl
index 88cb8ab63..0cefe929d 100644
--- a/apps/emqx_auth_mnesia/src/emqx_authz_api_mnesia.erl
+++ b/apps/emqx_auth_mnesia/src/emqx_authz_api_mnesia.erl
@@ -487,7 +487,7 @@ users(post, #{body := Body}) when is_list(Body) ->
         {error, {already_exists, Exists}} ->
             {409, #{
                 code => <<"ALREADY_EXISTS">>,
-                message => binfmt("User '~ts' already exist", [binjoin(Exists)])
+                message => binfmt("User '~ts' already exist", [Exists])
             }}
     end.
 
@@ -531,7 +531,7 @@ clients(post, #{body := Body}) when is_list(Body) ->
         {error, {already_exists, Exists}} ->
             {409, #{
                 code => <<"ALREADY_EXISTS">>,
-                message => binfmt("Client '~ts' already exist", [binjoin(Exists)])
+                message => binfmt("Client '~ts' already exist", [Exists])
             }}
     end.
 
@@ -762,16 +762,4 @@ ensure_rules_is_valid(Key, Type, MaxLen, [Cfg | Cfgs]) ->
 ensure_rules_is_valid(_Key, _Type, _MaxLen, []) ->
     ok.
 
-binjoin([Bin]) ->
-    Bin;
-binjoin(Bins) when is_list(Bins) ->
-    binjoin(Bins, <<>>);
-binjoin(Bin) ->
-    Bin.
-
-binjoin([H | T], Acc) ->
-    binjoin(T, <<H/binary, $,, Acc/binary>>);
-binjoin([], Acc) ->
-    Acc.
-
 binfmt(Fmt, Args) -> iolist_to_binary(io_lib:format(Fmt, Args)).
diff --git a/changes/ce/fix-13196.en.md b/changes/ce/fix-13196.en.md
new file mode 100644
index 000000000..b0fed0eae
--- /dev/null
+++ b/changes/ce/fix-13196.en.md
@@ -0,0 +1 @@
+In the built-in database of authorization, added a limit for the length of rules per client/user, and the default values is 100.