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QueryStringBindable

play.api.mvc.QueryStringBindable

See theQueryStringBindable companion object

Binder for query string parameters.

You can provide an implementation of QueryStringBindable[A] for any type A you want to be able to bind directly from the request query string.

For example, if you have the following type to encode pagination:

 /**
  * @param index Current page index
  * @param size Number of items in a page
  */
 case class Pager(index: Int, size: Int)

Play will create a Pager(5, 42) value from a query string looking like /foo?p.index=5&p.size=42 if you define an instance of QueryStringBindable[Pager] available in the implicit scope.

For example:

 object Pager {
   implicit def queryStringBinder(implicit intBinder: QueryStringBindable[Int]) = new QueryStringBindable[Pager] {
     override def bind(key: String, params: Map[String, Seq[String]]): Option[Either[String, Pager]] = {
       for {
         index <- intBinder.bind(key + ".index", params)
         size <- intBinder.bind(key + ".size", params)
       } yield {
         (index, size) match {
           case (Right(index), Right(size)) => Right(Pager(index, size))
           case _ => Left("Unable to bind a Pager")
         }
       }
     }
     override def unbind(key: String, pager: Pager): String = {
       intBinder.unbind(key + ".index", pager.index) + "&" + intBinder.unbind(key + ".size", pager.size)
     }
   }
 }

To use it in a route, just write a type annotation aside the parameter you want to bind:

 GET  /foo        controllers.foo(p: Pager)

Attributes

Companion: object
Graph
Supertypes: class Object

trait Matchable

class Any
Known subtypes: class Parsing[A]

object bindableBoolean

object bindableDouble

object bindableFloat

object bindableInt

object bindableLong

object bindableShort

object bindableUUID

object bindableChar
Show all
Self type: QueryStringBindable[A]

Members list

Value members

Abstract methods

Implicitly added by bindableJavaList

Bind a query string parameter.

Value parameters

key: Parameter key
params: QueryString data

Attributes

Returns: None if the parameter was not present in the query string data. Otherwise, returns Some of either Right of the parameter value, or Left of an error message if the binding failed.

Implicitly added by bindableJavaOption

Bind a query string parameter.

Value parameters

key: Parameter key
params: QueryString data

Attributes

Returns: None if the parameter was not present in the query string data. Otherwise, returns Some of either Right of the parameter value, or Left of an error message if the binding failed.

Implicitly added by bindableList

Bind a query string parameter.

Value parameters

key: Parameter key
params: QueryString data

Attributes

Returns: None if the parameter was not present in the query string data. Otherwise, returns Some of either Right of the parameter value, or Left of an error message if the binding failed.

Implicitly added by bindableOption

Bind a query string parameter.

Value parameters

key: Parameter key
params: QueryString data

Attributes

Returns: None if the parameter was not present in the query string data. Otherwise, returns Some of either Right of the parameter value, or Left of an error message if the binding failed.

Implicitly added by bindableSeq

Bind a query string parameter.

Value parameters

key: Parameter key
params: QueryString data

Attributes

Returns: None if the parameter was not present in the query string data. Otherwise, returns Some of either Right of the parameter value, or Left of an error message if the binding failed.

Bind a query string parameter.

Value parameters

key: Parameter key
params: QueryString data

Attributes

Returns: None if the parameter was not present in the query string data. Otherwise, returns Some of either Right of the parameter value, or Left of an error message if the binding failed.

Implicitly added by bindableJavaList

Unbind a query string parameter.

Value parameters

key: Parameter key
value: Parameter value.

Attributes

Returns: a query string fragment containing the key and its value. E.g. "foo=42"

Implicitly added by bindableJavaOption

Unbind a query string parameter.

Value parameters

key: Parameter key
value: Parameter value.

Attributes

Returns: a query string fragment containing the key and its value. E.g. "foo=42"

Implicitly added by bindableList

Unbind a query string parameter.

Value parameters

key: Parameter key
value: Parameter value.

Attributes

Returns: a query string fragment containing the key and its value. E.g. "foo=42"

Implicitly added by bindableOption

Unbind a query string parameter.

Value parameters

key: Parameter key
value: Parameter value.

Attributes

Returns: a query string fragment containing the key and its value. E.g. "foo=42"

Implicitly added by bindableSeq

Unbind a query string parameter.

Value parameters

key: Parameter key
value: Parameter value.

Attributes

Returns: a query string fragment containing the key and its value. E.g. "foo=42"

Unbind a query string parameter.

Value parameters

key: Parameter key
value: Parameter value.