Passing selected value of a select to form action - scala

Question

I have a menu that I want to differ based on which account is currently selected in the system.
I have a page that allows a user to select an account from an html select. When the user submits the form from the account selection page I want to call the menu method on my controller passing in the selected value so my url looks correct.
Here is the existing template from the page that allows a user to select an account:
#helper.form(action = routes.Accounts.menu {
<table>
<tr>
<td><select id="accountNames">
#accountNames.map { name =>
<option value="#name">#name</option>
}
</select></td>
</tr>
<tr>
<td>
<p>
<input type="submit" value="Choose">
</p>
</td>
</tr>
</table>
}
From my routes file:
GET /account/:accountName/menu controllers.Accounts.menu(accountName: String)
How do I reference the selected value from my select (id="accountNames") and pass it into my form action?

Answer 1

Actually I think you're on the wrong side for doing that.
If the form's action has to change over the use of your 'select', it has to be done using JS.
So when the form is submitted (event submit) you have to update the url.
This can be done easily using javascriptRoutes.
So you have to do several things:
1/ create the javascriptRouter (assuming your add it in Application.scala)
def javascriptRoutes = Action {
Ok(
Routes.javascriptRouter("playRoutes")(
//accounts
controllers.routes.javascript.Accounts.menu
)
).as("text/javascript")
}
2/ define it in your routes file
# Javascript routing
GET /assets/javascripts/routes controllers.Application.javascriptRoutes
3/ add the related javascript file import in your views, let say in main.scala.html
<script type="text/javascript" src="#routes.Application.javascriptRoutes"></script>
4/ add a submit handler to your form that does that before executing the default behavior
$("form").submit(function () {
//this computes the correct URL giving a parameter which is the value of the selected option
var newURl = playRoutes.controllers.Accounts.menu($("#accountNames").val()).url
$(this).attr("action", newUrl);
})
Notice how we've used playRoutes both in the controller (1) and the JS call (4).