diff --git "a/ruby/\351\200\273\350\276\221\347\254\246\345\217\267\344\274\230\345\205\210\347\272\247.md" "b/ruby/\351\200\273\350\276\221\347\254\246\345\217\267\344\274\230\345\205\210\347\272\247.md"
new file mode 100644
index 0000000000000000000000000000000000000000..f4b980aaa5e98b676210c223ffcf2aa9307d3a55
--- /dev/null
+++ "b/ruby/\351\200\273\350\276\221\347\254\246\345\217\267\344\274\230\345\205\210\347\272\247.md"
@@ -0,0 +1,11 @@
+
+```
+if can?(current_user, :download_code, @project) || @enterprise && !(@project.empty_repo? || @wait_fork || @wait_fetch)
+```
+&& 的优先级高于 ||
+
+判断时候，要注意加括号   
+改为如下：
+```
+if (can?(current_user, :download_code, @project) || @enterprise) && !(@project.empty_repo? || @wait_fork || @wait_fetch)
+```
\ No newline at end of file