How to read from a case class in Scala?

Question

I am new to Scala. I have a case class. The code is given below.

case class ReportInfoPosted(
  name:  Option[String],
  id:    Option[String],
  order: Option[Int]
)

I also have a function which returns an seq of objects of the class. This is what is being returned.

ReportInfoPosted(Some(Sales Dollars),Some(4e6d8ec1-4c00-4193-be15-2fa0509849a7),Some(0))

Now I want to read values from the object. I have looked at some resources on the web, this is what I have tried.

for(el <- reportlist){
    println(el.input)
}

for(el <- reportlist){
    println(el.id)
}

BTW, reportlist is the seq of obejcts. None are working. I don't know what to do.

What compilation/runtime-error messages do you get, what happens if you just println(reportlist)? What does your program output? — colinjwebb, Feb 25 '15 at 08:43
You have no `input` field in `ReportInfoPosted` so the line `println(el.input)` won't work — ccheneson, Feb 25 '15 at 08:45
@eddard.stark Please update your OP with the correction about `input` — ccheneson, Feb 25 '15 at 08:49
If it says "equals does not take parameters" then your problem lies outside of the code you've posted in the question. Does it give a line number? Can you post more of the code? — colinjwebb, Feb 25 '15 at 08:56

dhg · Accepted Answer · 2015-02-25T08:53:30.113

3

Your question is pretty vague. Do you just mean this?

val a = ReportInfoPosted(Some("a"), Some("a"), Some(1))
val b = ReportInfoPosted(Some("b"), Some("b"), Some(2))
val reportlist: Seq[ReportInfoPosted] = Seq(a,b)

for (report <- reportlist) {
  println(report.name)
}

prints:

Some(a)
Some(b)

edited Feb 25 '15 at 08:53

answered Feb 25 '15 at 08:41

dhg

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are Seq and Vector the same? I don't know, I have to say I am really new at this. – odbhut.shei.chhele Feb 25 '15 at 08:45
A Vector is a subtype of Seq. Any Seq class will work exactly the same is this example. – dhg Feb 25 '15 at 08:49
Umm my client has written Seq.. It is not compiling. Always some error regarding equals. What is equals? – odbhut.shei.chhele Feb 25 '15 at 08:50

How to read from a case class in Scala?

1 Answers1