[英]Scala Play Json Reads
I have a sample code as below. 我有一个示例代码如下。
import play.api.libs.json._
import play.api.libs.functional.syntax._
import play.api.data.validation.ValidationError
import play.api.libs.json.Reads._
case class Retailer(firstName:String,lastName:String,email:String,mobileNo:String,password:String)
case class Business(name:String,preferredUrl:String,businessPhone:String,retailer:Retailer)
object JsonTest {
val jsonValue = """
{
"business":
{
"name":"Some Business Name",
"preferredUrl":"someurl",
"businessPhone":"somenumber",
"retailer":
{
"firstName":"Some",
"lastName":"One",
"email":"someone@somewhere.com",
"mobileNo":"someothernumber",
"password":"$^^HFKH*"
}
}
}
"""
def printJson ={
implicit val rltRds = (
(__ \ "firstName").read[String] ~
(__ \ "lastName").read[String] ~
(__ \ "email").read[String] ~
(__ \ "mobileNo").read[String] ~
(__ \ "password").read[String]
)(Retailer)
implicit val bsnsRds = (
(__ \ "name").read[String] ~
(__ \ "preferredUrl").read[String] ~
(__ \ "businessPhone").read[String] ~
(__ \ "retailer").read[Retailer](rltRds)
)(Business)
val buisness = Json.parse(jsonValue).validate[Business](bsnsRds)
val bus = new Business("Some Business","somebusinessurl","somenumber", new Retailer("Some","One","someone@somewhere.com","someothernumber","$^^HFKH*"))
//val json = Json.toJson(bus)
println(buisness)
}
def main(args: Array[String]): Unit = {
printJson
}
}
I get Json Validation Error when I try to parse the json into Scala object (Business Class in this case). 当我尝试将json解析为Scala对象(在本例中为Business Class)时,我得到了Json Validation Error。 The error is
错误是
JsError(List((/retailer,List(ValidationError(validate.error.missing-path,WrappedArray()))), (/preferredUrl,List(ValidationError(validate.error.missing-path,WrappedArray()))), (/name,List(ValidationError(validate.error.missing-path,WrappedArray()))), (/businessPhone,List(ValidationError(validate.error.missing-path,WrappedArray())))))
However if my json is like 但是,如果我的json是喜欢的
val jsonValue = """
{
"name":"Some Business Name",
"preferredUrl":"someurl",
"businessPhone":"somenumber",
"retailer":
{
"firstName":"Some",
"lastName":"One",
"email":"someone@somewhere.com",
"mobileNo":"someothernumber",
"password":"$^^HFKH*"
}
}
"""
Note that the outer bracket "{" and the "business:" key are removed. 请注意,外部括号“{”和“business:”键被删除。 I get a JsSuccess.
我得到了一个JsSuccess。 How do I write the reads for the Json as in the first case?
如何在第一种情况下为Json写入读取? Also, how can I do it in a generic way?
另外,我怎么能以通用的方式做到这一点?
Please help. 请帮忙。
Just add the business
key in the path: 只需在路径中添加
business
键:
implicit val bsnsRds = (
(__ \ "business" \ "name").read[String] ~
(__ \ "business" \ "preferredUrl").read[String] ~
(__ \ "business" \ "businessPhone").read[String] ~
(__ \ "business" \ "retailer").read[Retailer](rltRds)
)(Business)
Slight variation to the above: 以上略有变化:
implicit val bsnsRds = ({
val business = (__ \ "business")
(business \ "name").read[String] ~
(business \ "preferredUrl").read[String] ~
(business \ "businessPhone").read[String] ~
(business \ "retailer").read[Retailer](rltRds)
})(Business)
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