Mixing
Creating a prototype of play's controller and action to help understand scala
I'm confused as to how the request object can be injected into the Action.
Was hoping someone could create a simple prototype of the following in scala:
class HomeController() extends AbstractController {
def index() = Action { request =>
Ok("hello")
}
}
What I mean is, create the above classes/functions to simple return a string "hello", with the ability to get other objects in scope like "request".
abstract class AbstractController()
case class Action(???)
case class Ok(????)
I am just confused has to how you can create an Action {} and then have request available in the block specifically.
scala
asked Jan 1 at 18:21
BlankmanBlankman
97.8k2706641043
add a comment |
I'm confused as to how the request object can be injected into the Action.
Was hoping someone could create a simple prototype of the following in scala:
class HomeController() extends AbstractController {
def index() = Action { request =>
Ok("hello")
}
}
What I mean is, create the above classes/functions to simple return a string "hello", with the ability to get other objects in scope like "request".
abstract class AbstractController()
case class Action(???)
case class Ok(????)
I am just confused has to how you can create an Action {} and then have request available in the block specifically.
scala
asked Jan 1 at 18:21
BlankmanBlankman
97.8k2706641043
It could be suggested to first have a look at the various tutorial available around the web about loan pattern and higher order functions
– cchantep
Jan 1 at 19:20
add a comment |
I'm confused as to how the request object can be injected into the Action.
Was hoping someone could create a simple prototype of the following in scala:
class HomeController() extends AbstractController {
def index() = Action { request =>
Ok("hello")
}
}
What I mean is, create the above classes/functions to simple return a string "hello", with the ability to get other objects in scope like "request".
abstract class AbstractController()
case class Action(???)
case class Ok(????)
I am just confused has to how you can create an Action {} and then have request available in the block specifically.
scala
asked Jan 1 at 18:21
BlankmanBlankman
97.8k2706641043
I'm confused as to how the request object can be injected into the Action.
Was hoping someone could create a simple prototype of the following in scala:
class HomeController() extends AbstractController {
def index() = Action { request =>
Ok("hello")
}
}
What I mean is, create the above classes/functions to simple return a string "hello", with the ability to get other objects in scope like "request".
abstract class AbstractController()
case class Action(???)
case class Ok(????)
I am just confused has to how you can create an Action {} and then have request available in the block specifically.
scala
scala
asked Jan 1 at 18:21
BlankmanBlankman
97.8k2706641043
asked Jan 1 at 18:21
BlankmanBlankman
97.8k2706641043
asked Jan 1 at 18:21
BlankmanBlankman
97.8k2706641043
asked Jan 1 at 18:21
BlankmanBlankman
97.8k2706641043
asked Jan 1 at 18:21
BlankmanBlankman
97.8k2706641043
97.8k2706641043
It could be suggested to first have a look at the various tutorial available around the web about loan pattern and higher order functions
– cchantep
Jan 1 at 19:20
add a comment |
It could be suggested to first have a look at the various tutorial available around the web about loan pattern and higher order functions
– cchantep
Jan 1 at 19:20
It could be suggested to first have a look at the various tutorial available around the web about loan pattern and higher order functions
– cchantep
Jan 1 at 19:20
It could be suggested to first have a look at the various tutorial available around the web about loan pattern and higher order functions
– cchantep
Jan 1 at 19:20
add a comment |
1 Answer
1
active
oldest
votes
If you write Action { request => ??? }, you're calling the apply method in the Action companion object. This method takes one parameter which is a function that takes a request and returns a response. The request value is the parameter of the function that you pass to the apply method.
Here's the method that you're calling.
If you would write a class like Action yourself, it may look similar to this:
case class Action(f: Request => Ok)
answered Jan 1 at 18:39
AkiAki
1,098214
The scaladoc permalink that I posted should point to the methodapply(block: (R[B]) ⇒ Result): Action[B], but scaladoc permalinks seems to be a little broken...
– Aki
Jan 1 at 18:43
Thanks, but I am looking for a complete example to get my mind to grasp this concept. It is still a little abstract in my mind.
– Blankman
Jan 2 at 21:38
Does this help: scastie.scala-lang.org/cizN7sDLT2mXzaDrvuQPXg
– Aki
Jan 2 at 23:32
that is perfect! Can you break down what this is in detail pleasecase class Action(f: Request => Ok)the parameter is f, which is a function who's input is a of type Request and returns type OK right? is this passed by name style?
– Blankman
Jan 3 at 3:50
add a comment |
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1 Answer
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active
oldest
votes
1 Answer
1
active
oldest
votes
active
oldest
votes
active
oldest
votes
If you write Action { request => ??? }, you're calling the apply method in the Action companion object. This method takes one parameter which is a function that takes a request and returns a response. The request value is the parameter of the function that you pass to the apply method.
Here's the method that you're calling.
If you would write a class like Action yourself, it may look similar to this:
case class Action(f: Request => Ok)
answered Jan 1 at 18:39
AkiAki
1,098214
The scaladoc permalink that I posted should point to the methodapply(block: (R[B]) ⇒ Result): Action[B], but scaladoc permalinks seems to be a little broken...
– Aki
Jan 1 at 18:43
Thanks, but I am looking for a complete example to get my mind to grasp this concept. It is still a little abstract in my mind.
– Blankman
Jan 2 at 21:38
Does this help: scastie.scala-lang.org/cizN7sDLT2mXzaDrvuQPXg
– Aki
Jan 2 at 23:32
that is perfect! Can you break down what this is in detail pleasecase class Action(f: Request => Ok)the parameter is f, which is a function who's input is a of type Request and returns type OK right? is this passed by name style?
– Blankman
Jan 3 at 3:50
add a comment |
If you write Action { request => ??? }, you're calling the apply method in the Action companion object. This method takes one parameter which is a function that takes a request and returns a response. The request value is the parameter of the function that you pass to the apply method.
Here's the method that you're calling.
If you would write a class like Action yourself, it may look similar to this:
case class Action(f: Request => Ok)
answered Jan 1 at 18:39
AkiAki
1,098214
The scaladoc permalink that I posted should point to the methodapply(block: (R[B]) ⇒ Result): Action[B], but scaladoc permalinks seems to be a little broken...
– Aki
Jan 1 at 18:43
Thanks, but I am looking for a complete example to get my mind to grasp this concept. It is still a little abstract in my mind.
– Blankman
Jan 2 at 21:38
Does this help: scastie.scala-lang.org/cizN7sDLT2mXzaDrvuQPXg
– Aki
Jan 2 at 23:32
that is perfect! Can you break down what this is in detail pleasecase class Action(f: Request => Ok)the parameter is f, which is a function who's input is a of type Request and returns type OK right? is this passed by name style?
– Blankman
Jan 3 at 3:50
add a comment |
If you write Action { request => ??? }, you're calling the apply method in the Action companion object. This method takes one parameter which is a function that takes a request and returns a response. The request value is the parameter of the function that you pass to the apply method.
Here's the method that you're calling.
If you would write a class like Action yourself, it may look similar to this:
case class Action(f: Request => Ok)
answered Jan 1 at 18:39
AkiAki
1,098214
If you write Action { request => ??? }, you're calling the apply method in the Action companion object. This method takes one parameter which is a function that takes a request and returns a response. The request value is the parameter of the function that you pass to the apply method.
Here's the method that you're calling.
If you would write a class like Action yourself, it may look similar to this:
case class Action(f: Request => Ok)
answered Jan 1 at 18:39
AkiAki
1,098214
edited Jan 1 at 18:44
answered Jan 1 at 18:39
AkiAki
1,098214
answered Jan 1 at 18:39
AkiAki
1,098214
answered Jan 1 at 18:39
AkiAki
1,098214
1,098214
The scaladoc permalink that I posted should point to the methodapply(block: (R[B]) ⇒ Result): Action[B], but scaladoc permalinks seems to be a little broken...
– Aki
Jan 1 at 18:43
Thanks, but I am looking for a complete example to get my mind to grasp this concept. It is still a little abstract in my mind.
– Blankman
Jan 2 at 21:38
Does this help: scastie.scala-lang.org/cizN7sDLT2mXzaDrvuQPXg
– Aki
Jan 2 at 23:32
that is perfect! Can you break down what this is in detail pleasecase class Action(f: Request => Ok)the parameter is f, which is a function who's input is a of type Request and returns type OK right? is this passed by name style?
– Blankman
Jan 3 at 3:50
add a comment |
The scaladoc permalink that I posted should point to the methodapply(block: (R[B]) ⇒ Result): Action[B], but scaladoc permalinks seems to be a little broken...
– Aki
Jan 1 at 18:43
Thanks, but I am looking for a complete example to get my mind to grasp this concept. It is still a little abstract in my mind.
– Blankman
Jan 2 at 21:38
Does this help: scastie.scala-lang.org/cizN7sDLT2mXzaDrvuQPXg
– Aki
Jan 2 at 23:32
that is perfect! Can you break down what this is in detail pleasecase class Action(f: Request => Ok)the parameter is f, which is a function who's input is a of type Request and returns type OK right? is this passed by name style?
– Blankman
Jan 3 at 3:50
The scaladoc permalink that I posted should point to the method
apply(block: (R[B]) ⇒ Result): Action[B] , but scaladoc permalinks seems to be a little broken...– Aki
Jan 1 at 18:43
The scaladoc permalink that I posted should point to the method
apply(block: (R[B]) ⇒ Result): Action[B] , but scaladoc permalinks seems to be a little broken...– Aki
Jan 1 at 18:43
Thanks, but I am looking for a complete example to get my mind to grasp this concept. It is still a little abstract in my mind.
– Blankman
Jan 2 at 21:38
Thanks, but I am looking for a complete example to get my mind to grasp this concept. It is still a little abstract in my mind.
– Blankman
Jan 2 at 21:38
Does this help: scastie.scala-lang.org/cizN7sDLT2mXzaDrvuQPXg
– Aki
Jan 2 at 23:32
Does this help: scastie.scala-lang.org/cizN7sDLT2mXzaDrvuQPXg
– Aki
Jan 2 at 23:32
that is perfect! Can you break down what this is in detail please
case class Action(f: Request => Ok) the parameter is f, which is a function who's input is a of type Request and returns type OK right? is this passed by name style?– Blankman
Jan 3 at 3:50
that is perfect! Can you break down what this is in detail please
case class Action(f: Request => Ok) the parameter is f, which is a function who's input is a of type Request and returns type OK right? is this passed by name style?– Blankman
Jan 3 at 3:50
add a comment |
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It could be suggested to first have a look at the various tutorial available around the web about loan pattern and higher order functions
– cchantep
Jan 1 at 19:20