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POOptional Json Body Parser
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  1. POOptional Json Body Parser
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    copied!<p>I'm trying to write a DRY CRUD restful service using PlayFramework. Here's the code for it. </p> <pre><code>def crudUsers(operation: String) = Action(parse.json) { request =&gt; (request.body).asOpt[User].map { jsonUser =&gt; try { DBGlobal.db.withTransaction { val queryResult = operation match { case "create" =&gt; UsersTable.forInsert.insertAll(jsonUser) Json.generate(Map("status" -&gt; "Success", "message" -&gt; "Account inserted")) case "update" =&gt; val updateQ = UsersTable.where(_.email === jsonUser.email.bind).map(_.forInsert) println(updateQ.selectStatement) updateQ.update(jsonUser) Json.generate(Map("status" -&gt; "Success", "message" -&gt; "Account updated")) case "retrieve" =&gt; val retrieveQ = for(r &lt;- UsersTable) yield r println(retrieveQ.selectStatement) Json.generate(retrieveQ.list) case "delete" =&gt; val deleteQ = UsersTable.where(_.email === jsonUser.email) deleteQ.delete Json.generate(Map("status" -&gt; "Success", "message" -&gt; "Account deleted")) } Ok(queryResult) } } catch { case _ =&gt; val errMsg: String = operation + " error" BadRequest(Json.generate(Map("status" -&gt; "Error", "message" -&gt; errMsg))) } }.getOrElse(BadRequest(Json.generate(Map("status" -&gt; "Error", "message" -&gt; "error")))) </code></pre> <p>} }</p> <p>I've noticed that update, delete and create operations work nicely. However the retrieve operation fails with <code>For request 'GET /1/users' [Invalid Json]</code>. I'm pretty sure this is because the JSON parser is not tolerant of a GET request with no JSON passed in the body.</p> <p>Is there a way to special case the GET/Retrieve operation without losing losing the DRY approach I've started here? </p>
 

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