Scala Play `#routes.Assets.versioned` causing a non descriptive error - scala

Question

I have a problem with browser caching, so I decided to change
<script type="text/javascript" src="#routes.Assets.at("/accounts/dist/inline.bundle.js")"></script>
to
<script type="text/javascript" src="#routes.Assets.versioned("/public/accounts/dist","inline.bundle.js")"></script>
as we already do in other projects, but I am getting this totally unhelpful error:
C:\work\FrontServices\Spike2>sbt -jvm-debug 9999 run
"C:\Users\xavier\.sbt\preloaded\org.scala-sbt\sbt\"1.0.2"\jars\sbt.jar"
Picked up JAVA_TOOL_OPTIONS: -Dfile.encoding=UTF8
Java HotSpot(TM) 64-Bit Server VM warning: ignoring option MaxPermSize=256m; support was removed in 8.0
Listening for transport dt_socket at address: 58387
[warn] Executing in batch mode.
[warn] For better performance, hit [ENTER] to switch to interactive mode, or
[warn] consider launching sbt without any commands, or explicitly passing 'shell'
[info] Loading project definition from C:\Users\xavier\.sbt\0.13\staging\560eb781744c869bfbb7\sbt-coveralls\project
[info] Loading project definition from C:\work\FrontServices\Spike2\project
[info] Set current project to Spike2 (in build file:/C:/work/FrontServices/Spike2/)
[info] Compiling 1 Scala source to C:\work\FrontServices\Spike2\modules\accounts\target\scala-2.11\classes...
[error] C:\work\FrontServices\Spike2\modules\accounts\app\com\newswhip\accounts\views\accounts.scala.html:20: too many arguments for method versioned: (file: controllers.Assets.Asset)play.api.mvc.Call
[error] <script type="text/javascript" src="#routes.Assets.versioned("/public/accounts/dist","inline.bundle.js")"></script>
[error] ^
[error] C:\work\FrontServices\Spike2\modules\accounts\app\com\newswhip\accounts\views\accounts.scala.html:21: too many arguments for method versioned: (file: controllers.Assets.Asset)play.api.mvc.Call
[error] <script type="text/javascript" src="#routes.Assets.versioned("/public/accounts/dist","polyfills.bundle.js")"></script>
[error] ^
[error] C:\work\FrontServices\Spike2\modules\accounts\app\com\newswhip\accounts\views\accounts.scala.html:22: too many arguments for method versioned: (file: controllers.Assets.Asset)play.api.mvc.Call
[error] <script type="text/javascript" src="#routes.Assets.versioned("/public/accounts/dist","styles.bundle.js")"></script>
[error] ^
[error] C:\work\FrontServices\Spike2\modules\accounts\app\com\newswhip\accounts\views\accounts.scala.html:23: too many arguments for method versioned: (file: controllers.Assets.Asset)play.api.mvc.Call
[error] <script type="text/javascript" src="#routes.Assets.versioned("/public/accounts/dist","vendor.bundle.js")"></script>
[error] ^
[error] C:\work\FrontServices\Spike2\modules\accounts\app\com\newswhip\accounts\views\accounts.scala.html:24: too many arguments for method versioned: (file: controllers.Assets.Asset)play.api.mvc.Call
[error] <script type="text/javascript" src="#routes.Assets.versioned("/public/accounts/dist","main.bundle.js")"></script>
[error] ^
[error] 5 errors found
[error] (accounts/compile:compileIncremental) Compilation failed
[error] Total time: 4 s, completed 20-Oct-2017 10:27:09
C:\work\FrontServices\Spike2>
This is the code fragment from the routes file
# Map static resources from the /public folder to the /assets URL path
GET /assets/*file controllers.Assets.versioned(path = "/public/accounts/dist", file: Asset)
# Map static resources from the /public folder to the /assets URL path
GET /assets/*file controllers.Assets.at(path = "/public", file)
Any ideas?

Answer 1

In src="#routes.Assets.versioned("/public/accounts/dist","inline.bundle.js")"
why are you separating the two string with comma inside versioned().
That means that you are giving versioned() two parameters because of which it is throwing an error because it only expects one.
Instead you should give it like this -
src="#routes.Assets.versioned("/public/accounts/dist/inline.bundle.js")"
assuming inline.bundle.js is at the path /public/accounts/dist/
Try this out and let me know if it works. I hope it does!

Answer 2

In your routes definition you are doing:
GET /assets/*file controllers.Assets.versioned(path = "/public/accounts/dist", file: Asset)
That means the first parameter for method Assets.versioned is already defined (path = "/public/accounts/dist"). So, you have room for one more parameter only (the asset file). But in your views you have:
<script type="text/javascript" src="#routes.Assets.versioned("/public/accounts/dist","inline.bundle.js")"></script>
In other words, you are trying to define the path again, but this is the generated reverse router now (#routes.Assets) and not the "original" Assets.versioned, then you get the error.
The solution is to change the code to pass only the file parameter:
<script type="text/javascript" src="#routes.Assets.versioned("inline.bundle.js")"></script>