[Lift] Re: intro to lift-json?
Hi,
There's several ways to get values from JSON.
1. Use LINQ style query comprehension:
for { JField(bar, JInt(x)) - json } yield x
2. Extract values with case classes
implicit val formats = net.liftweb.json.DefaultFormats
case class Foo(foo: Bar)
case class Bar(bar: Int)
json.extract[Foo]
3. XPath style
val JField(bar, JInt(x)) = json \ foo \ bar
Cheers Joni
On 19 marras, 22:20, harryh har...@gmail.com wrote:
Is there a basic intro to lift-json floating around anywhere? I'm
having a bit of trouble getting started with a couple basic things.
For example if a have a JObject that corresponds to:
{
foo : {
bar : 999
}
}
How do I get the 999 (as an int) out of the JObject? I'm sure this is
simple, just a bit confused on the basics.
-harryh
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Re: [Lift] Re: intro to lift-json?
I like that.
But still hate JSON ;-)
2009/11/20 Joni Freeman freeman.j...@gmail.com:
Hi,
There's several ways to get values from JSON.
1. Use LINQ style query comprehension:
for { JField(bar, JInt(x)) - json } yield x
2. Extract values with case classes
implicit val formats = net.liftweb.json.DefaultFormats
case class Foo(foo: Bar)
case class Bar(bar: Int)
json.extract[Foo]
3. XPath style
val JField(bar, JInt(x)) = json \ foo \ bar
Cheers Joni
On 19 marras, 22:20, harryh har...@gmail.com wrote:
Is there a basic intro to lift-json floating around anywhere? I'm
having a bit of trouble getting started with a couple basic things.
For example if a have a JObject that corresponds to:
{
foo : {
bar : 999
}
}
How do I get the 999 (as an int) out of the JObject? I'm sure this is
simple, just a bit confused on the basics.
-harryh
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Jonas Bonér
twitter: @jboner
blog:http://jonasboner.com
work: http://scalablesolutions.se
code: http://github.com/jboner
code: http://akkasource.org
also:http://letitcrash.com
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[Lift] Re: intro to lift-json?
You may find the Extraction tests helpful:
http://github.com/dpp/liftweb/blob/master/lift-base/lift-json/src/test/scala/net/liftweb/json/ExtractionExamples.scala
On Nov 19, 3:20 pm, harryh har...@gmail.com wrote:
Is there a basic intro to lift-json floating around anywhere? I'm
having a bit of trouble getting started with a couple basic things.
For example if a have a JObject that corresponds to:
{
foo : {
bar : 999
}
}
How do I get the 999 (as an int) out of the JObject? I'm sure this is
simple, just a bit confused on the basics.
-harryh
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[Lift] Re: intro to lift-json?
Why does this parse into a JArray(List(..)) intead of a JArray(..) ?
-harryh
scala parse( { ids : [1, 2] } )
res5: net.liftweb.json.JsonAST.JValue = JObject(List(JField(ids,JArray
(List(JInt(1), JInt(2))
On Nov 19, 3:51 pm, Tim Nelson tnell...@gmail.com wrote:
Have you seen the readme file?
http://github.com/dpp/liftweb/tree/master/lift-base/lift-json/
On Thu, Nov 19, 2009 at 2:20 PM, harryh har...@gmail.com wrote:
Is there a basic intro to lift-json floating around anywhere? I'm
having a bit of trouble getting started with a couple basic things.
For example if a have a JObject that corresponds to:
{
foo : {
bar : 999
}
}
How do I get the 999 (as an int) out of the JObject? I'm sure this is
simple, just a bit confused on the basics.
-harryh
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Re: [Lift] Re: intro to lift-json?
JArray is a case class that wraps a List. It's not an array-of-list or
anything, just that the actual elements are stored in a List that
JArray holds.
-Ross
On Nov 19, 2009, at 5:12 PM, harryh wrote:
Why does this parse into a JArray(List(..)) intead of a JArray(..) ?
-harryh
scala parse( { ids : [1, 2] } )
res5: net.liftweb.json.JsonAST.JValue = JObject(List(JField(ids,JArray
(List(JInt(1), JInt(2))
On Nov 19, 3:51 pm, Tim Nelson tnell...@gmail.com wrote:
Have you seen the readme file?
http://github.com/dpp/liftweb/tree/master/lift-base/lift-json/
On Thu, Nov 19, 2009 at 2:20 PM, harryh har...@gmail.com wrote:
Is there a basic intro to lift-json floating around anywhere? I'm
having a bit of trouble getting started with a couple basic things.
For example if a have a JObject that corresponds to:
{
foo : {
bar : 999
}
}
How do I get the 999 (as an int) out of the JObject? I'm sure
this is
simple, just a bit confused on the basics.
-harryh
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[Lift] Re: intro to lift-json?
Ah, ok. That makes sense. Thx!
On Nov 19, 5:14 pm, Ross Mellgren dri...@gmail.com wrote:
JArray is a case class that wraps a List. It's not an array-of-list or
anything, just that the actual elements are stored in a List that
JArray holds.
-Ross
On Nov 19, 2009, at 5:12 PM, harryh wrote:
Why does this parse into a JArray(List(..)) intead of a JArray(..) ?
-harryh
scala parse( { ids : [1, 2] } )
res5: net.liftweb.json.JsonAST.JValue = JObject(List(JField(ids,JArray
(List(JInt(1), JInt(2))
On Nov 19, 3:51 pm, Tim Nelson tnell...@gmail.com wrote:
Have you seen the readme file?
http://github.com/dpp/liftweb/tree/master/lift-base/lift-json/
On Thu, Nov 19, 2009 at 2:20 PM, harryh har...@gmail.com wrote:
Is there a basic intro to lift-json floating around anywhere? I'm
having a bit of trouble getting started with a couple basic things.
For example if a have a JObject that corresponds to:
{
foo : {
bar : 999
}
}
How do I get the 999 (as an int) out of the JObject? I'm sure
this is
simple, just a bit confused on the basics.
-harryh
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