IntelliJ Idea Ultimate red-underlines Ruby shorthand hash literal - ruby

Question

Anybody know why IntelliJ Idea Ultimate doesn't like Ruby hash literals in the newer syntax? Refer to the red underlines in my screenshot from the IDE below. Syntax:
{key1: "value", key2: 123}
Really annoying as it means my entire project has a red underline all the way up the directory tree.
I have setup a Ruby SDK version greater than 1.9 (which is when i think the new hash literal syntax was introduced) in the IDE preferences, so there is no excuse!
Thanks.

Answer 1

How I fixed this in Intellij 14.1:
File -> Project Structure
Delete the existing module which defaulted to Java (doesn't delete the actual files)
Use green + button to create a new module with same name/location, but this time associated with Ruby on Rails instead of Java (with correct SDK)
File -> Close Project
Reopen project.
Previously I tried just changing the project SDK from the default of Java to Ruby, but this didn't fix the issue.

Answer 2

Under OSX IntelliJ 14 I was able to fix this by closing the project and reopening it.
In fairness, I did try setting the project's "language level", but it only shows Java SDKs, which shouldn't affect my main Ruby module.

Answer 3

This seems to be a bug in the Ruby plugin: http://devnet.jetbrains.com/thread/457333
Anyone who doesn't feel like changing his code base, the following steps resolved the issue for me:
Open File -> Project Structure
Open the Project Tab
Change the Project Language Level
Click OK
IntelliJ now asks if you would like to reload your project. After doing so the "new" Hash Syntax is considered correct...
Edit: It doesn't really matter what you select as language level as it is only relevant for Java code, but apparently this triggers something in the code parser...

Answer 4

What helped me in my case:
Open File -> Project Structure
Remove current using module
Import module ( set path to your project)
Intellij did rest for me

Answer 5

dsager's answer no longer works in Intellij Idea 14. I believe they added the ability to switch language levels without having to reload (great for java development, but breaks this). It's a lame workaround, but the only way I have found now is to create a new ruby project and then move all of your existing sources into it. Something like the following:
PROJECT=my_project
cp -lr $PROJECT ${PROJECT}2
rm -rf ${PROJECT}2/.idea ${PROJECT}2/*.iml
Create new ruby project 'my_project' with appropriate SDK, then:
mv ${PROJECT}2 $PROJECT
Side note: They made Idea's 'Open' command more flexible in 14 in that you can open any directory... much like that of RubyMine. It's quite convenient for opening anything that's not a java project, but this one is annoying.

Answer 6

Answer is to replace every usage of the horrible new hash syntax with the old one using a regex (not perfect yet but works ~95% of the time).
files=gfind . -iregex '.*\(rb\|haml\)' -printf '%p\n'
for file in $files
do
gsed -i "s/([a-z_]+):{1}\s+(('\|"'"'")\?[-a-zA-Z0-9{}:#]+('\|"'"'")\?)/:\1 => \2/g" $file
done