How to handle optional query parameters in Play framework

Question

Lets say I have an already functioning Play 2.0 framework based application in Scala that serves a URL such as:

http://localhost:9000/birthdays

which respond

Answer 1

For optional Query parameters, you can do it this way

In routes file, declare API

GET   /birthdays     controllers.Application.method(from: Long, to: Long)

You can also give some default value, in case API doesn't contain these query params it will automatically assign the default values to these params

GET   /birthdays    controllers.Application.method(from: Long ?= 0, to: Long ?= 10)

In method written inside controller Application these params will have value null if no default values assigned else default values.