Databases
StackOverflow2013
Postsdbo
PO
 

Note that there are some explanatory texts on larger screens.

plurals
  1. PO
    primarykey
    data
    text
    <p>In my humble opinion, your approach is not ideal and you have to rethink about your design. Let me explain you why.</p> <p>While you could effectively develop a <code>Format[A]</code> which is able to read both formats, you are not able to write a <code>Format[A]</code> which can write the two formats</p> <pre><code>trait Format[T]{ def reads (json: JsValue): T def writes (o: T): JsValue } </code></pre> <p>As you see, the writes method has a single parameter, so your <code>Format[Test]</code> won't be able to know if it should use one or the other output format. If you followed the reasoning you would agree that the <code>Format</code> trait is delegated to write and read from/to a <strong>specific</strong> Json Format, not to choose between formats. Your logic to choose the right format has nothing to do with reading and writing the right format, and you should decouple it. </p> <p>Saying that, you can re-use your Format[Test] in the following way:</p> <pre><code>case class ObjectParser(nestedFormatter:Format[T]) extends Format[T]{ def reads (json: JsValue): T = nestedFormatter.read(json \ "object") def writes (o: T): JsValue = JsObject("object" -&gt; nestedFormatter.write(o)) } </code></pre> <p>This class would take any existing formatter and make it able to read and write inside an additional "object" node. </p> <p>Imagine now you have a controller which needs to generate or parse two different answers according to the url endpoints:</p> <pre><code>object TestController extends Controller { def endPoint1Action = Action{ implicit request =&gt; generateResponse(FopReads) } def endPoin21Action = Action{ implicit request =&gt; generateResponse(ObjectParser(FopReads)) } def generateResponse(formatter:Format[Test])(implicit request:Request[AnyContent]):Response = BadRequest("!") } </code></pre>
    singulars
    1. This table or related slice is empty.
    1. POPlayframework 2.0.X scala - How to implement multiple json reads/writes for an object?
      singulars
      1. PTQuestion
    1. PTAnswer
    1. USEdmondo1984
    1. USEdmondo1984
    plurals
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. POPlayframework 2.0.X scala - How to implement multiple json reads/writes for an object?
      singulars
      1. PTQuestion
    1. This table or related slice is empty.
    1. VO
      singulars
      1. PO
      1. This table or related slice is empty.
      1. VTUpMod
    2. VO
      singulars
      1. PO
      1. This table or related slice is empty.
      1. VTAcceptedByOriginator
    3. VO
      singulars
      1. PO
      1. This table or related slice is empty.
      1. VTDownMod
    1. COIt's what I thought. Thank you, it helps me to clearly improve my comprehension of this.
      singulars
      1. PO
      1. USalexgindre
 

Querying!

 
Guidance
A row detail

Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

Related data can be related in a to-one or a to-many fashion. Captions of data related in a to-many fashion link to a list view showing a filtered view of the table.

Try moving around until you find a non-empty to-many entry and click on the label to get to one. You can move back to the root by clicking on the database name in the header.

SQuiL has stopped working due to an internal error.

If you are curious you may find further information in the browser console, which is accessible through the devtools (F12).

Reload