Retrieving map value using key in Scala Play Framework view

Question

I've passed a map of [String, List[String]] to one of my views in Play. The user is selecting a value from a dropdown. This value is a key in my map. I am using this key to then populate a second dropdown using the value in the map - a list of String. However, I do not know how to use Play's template language to get the value out of my map since I'm retrieving the key via JavaScript.

This is my code:

function selectSubCat() {
        var key = $("#monthYear").find(":selected").text(); // get the selected option's text. This is the map key.

// Here lies the issue. mailingRunDates is the name of the map I've passed to the view. Play says: val key not found.
        var runDatesList = @mailingRunDates(key)

Carlos Vilchez · Accepted Answer · 2016-05-17 15:35:47Z

1

I think you are trying to communicate javascript with the playframework template engine. And I am afraid you can't do it except if you are trying to communicate with a controller using ajax.

In your case the compiler is looking for a variable declared as a dynamic statement. It is code that is run in the server, so when the template is transformed into html it cannot be changed. You can declare a variable in the template system using something like @{key=12}.

So in this case, I would extract all the Map[String, List[String]] to a javascript object to create that functionality in javascript.

answered May 17, 2016 at 15:35

Carlos Vilchez

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