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    <p>Why not make <code>info</code> a case class argument as well?</p> <pre><code>case class One(someParam: String, info: Option[Info]) </code></pre> <p>You could implement a default value for <code>info</code> by defining the companion object like</p> <pre><code>object One { def apply(someParam: String): One = One(someParam, someSmartService.getInformationForSomething(someParam)) } </code></pre> <p>That would allow you to work with <code>One</code>s as follows:</p> <pre><code>One("foo") One("foo", Some(...)) One(encryptedSomeParam, encryptedInfo) One("plaintext").copy(someParam = encryptedSomeParam, info = encryptedInfo) </code></pre> <p><strong>EDIT 1: Lazy info</strong></p> <p>Case classes cannot have lazy val arguments, i.e., neither <code>info: =&gt; Option[String]</code> nor <code>lazy val info: Option[String]</code> is allowed as an argument type.</p> <p>You could make <code>info</code> a parameter-less function, though</p> <pre><code>case class One(someParam: String, info: () =&gt; Option[String]) object One { def apply(someParam: String): One = One(someParam, () =&gt; Some(someParam)) } </code></pre> <p>and then use it as</p> <pre><code>One("hi", () =&gt; Some("foo")) println(One("hi", () =&gt; None).info()) </code></pre> <p>This is obviously not ideal since it is not possible to introduce these changes without breaking code client code. Better solutions are welcome.</p> <p><strong>EDIT 2: Lazy info, no case class</strong></p> <p>If you don't insist on <code>One</code> being a case class (for example, because you really need <code>copy</code>), you could use a regular class with lazy values and a companion object for easy use:</p> <pre><code>class One(_someParam: String, _info: =&gt; Option[String]) { val someParam = _someParam lazy val info = _info } object One { def apply(someParam: String): One = new One(someParam, Await.result(...)) def apply(someParam: String, info: =&gt; Option[String]): One = new One(someParam, info) def unapply(one: One) = Some((one.someParam, one.info)) } </code></pre>
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    1. USMalte Schwerhoff
    1. USMalte Schwerhoff
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    1. COThanks for your answer. This looks like a good idea and I think for me it would be a best solution :) But if someone will decide, that this field should be lazy?
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    2. COAnd there is another issue: someSmartService.getInformationForSomething returns a Future, so I did some mistake with describing the info val, sorry for that. I made an edit for that.
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    3. CO@britva See my second edit.
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