Unable to delete microschema, after it had been updated

[npomaroli]

Gentics Mesh Version, operating system, or hardware.

• v0.28.2

Problem

After a microschema has been updated, it can no longer be deleted.

Reproducer

1. Create microschema
2. Update microschema by adding an additional field
3. Try to delete the microschema

Expected behaviour and actual behaviour

Expected: microschema should be deleted
Actual: Request gets a 500 response.

Logged exception:

org.apache.commons.lang.NotImplementedException: The deletion behaviour for this vertex was not implemented.
    at com.gentics.mesh.core.data.generic.MeshVertexImpl.delete(MeshVertexImpl.java:166) ~[mesh.jar:na]
    at com.gentics.mesh.core.data.container.impl.MicroschemaContainerVersionImpl.delete(MicroschemaContainerVersionImpl.java:168) ~[mesh.jar:na]
    at com.gentics.mesh.core.data.container.impl.MicroschemaContainerImpl.delete(MicroschemaContainerImpl.java:61) ~[mesh.jar:na]
    at com.gentics.mesh.core.verticle.handler.HandlerUtilities.lambda$null$0(HandlerUtilities.java:98) ~[mesh.jar:na]
    at com.syncleus.ferma.tx.TxFactory.lambda$tx$1(TxFactory.java:71) ~[mesh.jar:na]
    at com.gentics.mesh.graphdb.OrientDBDatabase.tx(OrientDBDatabase.java:931) ~[mesh.jar:na]
    at com.syncleus.ferma.tx.TxFactory.tx(TxFactory.java:70) ~[mesh.jar:na]
    at com.gentics.mesh.core.verticle.handler.HandlerUtilities.lambda$deleteElement$1(HandlerUtilities.java:94) ~[mesh.jar:na]
    at com.gentics.mesh.graphdb.OrientDBDatabase.tx(OrientDBDatabase.java:931) ~[mesh.jar:na]
    at com.gentics.mesh.core.verticle.handler.HandlerUtilities.lambda$asyncTx$12(HandlerUtilities.java:260) ~[mesh.jar:na]
    at com.gentics.mesh.core.verticle.handler.HandlerUtilities.lambda$async$17(HandlerUtilities.java:304) ~[mesh.jar:na]
    at io.vertx.core.impl.ContextImpl.lambda$executeBlocking$1(ContextImpl.java:273) ~[mesh.jar:na]
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142) ~[na:1.8.0_111-internal]
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617) ~[na:1.8.0_111-internal]
    at java.lang.Thread.run(Thread.java:745) ~[na:1.8.0_111-internal]
10:49:29.136 [Comical Zangoose] ERROR [vert.x-eventloop-thread-0] - Unexpected exception in route
java.lang.IllegalArgumentException: code: -1 (expected: 0+)
    at io.netty.handler.codec.http.HttpResponseStatus.<init>(HttpResponseStatus.java:581) ~[mesh.jar:na]
    at io.netty.handler.codec.http.HttpResponseStatus.<init>(HttpResponseStatus.java:569) ~[mesh.jar:na]
    at io.netty.handler.codec.http.HttpResponseStatus.valueOf(HttpResponseStatus.java:446) ~[mesh.jar:na]
    at io.vertx.core.http.impl.HttpServerResponseImpl.setStatusCode(HttpServerResponseImpl.java:112) ~[mesh.jar:na]
    at com.gentics.mesh.router.route.FailureHandler.handle(FailureHandler.java:147) ~[mesh.jar:na]
    at com.gentics.mesh.router.route.FailureHandler.handle(FailureHandler.java:27) ~[mesh.jar:na]
    at io.vertx.ext.web.impl.RouteImpl.handleFailure(RouteImpl.java:235) ~[mesh.jar:na]
    at io.vertx.ext.web.impl.RoutingContextImplBase.iterateNext(RoutingContextImplBase.java:117) ~[mesh.jar:na]
    at io.vertx.ext.web.impl.RoutingContextImpl.next(RoutingContextImpl.java:133) [mesh.jar:na]
    at io.vertx.ext.web.impl.RoutingContextImpl.doFail(RoutingContextImpl.java:465) [mesh.jar:na]
    at io.vertx.ext.web.impl.RoutingContextImpl.fail(RoutingContextImpl.java:166) [mesh.jar:na]
    at io.vertx.ext.web.impl.RoutingContextWrapper.fail(RoutingContextWrapper.java:73) [mesh.jar:na]
    at io.vertx.ext.web.impl.RoutingContextWrapper.fail(RoutingContextWrapper.java:73) [mesh.jar:na]
    at com.gentics.mesh.context.impl.InternalRoutingActionContextImpl.fail(InternalRoutingActionContextImpl.java:131) [mesh.jar:na]
    at com.gentics.mesh.core.verticle.handler.HandlerUtilities.lambda$async$18(HandlerUtilities.java:310) [mesh.jar:na]
    at io.vertx.core.impl.FutureImpl.setHandler(FutureImpl.java:79) ~[mesh.jar:na]
    at io.vertx.core.impl.ContextImpl.lambda$null$0(ContextImpl.java:289) ~[mesh.jar:na]
    at io.vertx.core.impl.ContextImpl.lambda$wrapTask$2(ContextImpl.java:339) ~[mesh.jar:na]
    at io.netty.util.concurrent.AbstractEventExecutor.safeExecute(AbstractEventExecutor.java:163) ~[mesh.jar:na]
    at io.netty.util.concurrent.SingleThreadEventExecutor.runAllTasks(SingleThreadEventExecutor.java:403) ~[mesh.jar:na]
    at io.netty.channel.epoll.EpollEventLoop.run(EpollEventLoop.java:309) ~[mesh.jar:na]
    at io.netty.util.concurrent.SingleThreadEventExecutor$5.run(SingleThreadEventExecutor.java:858) ~[mesh.jar:na]
    at java.lang.Thread.run(Thread.java:745) ~[na:1.8.0_111-internal]

[Jotschi]

TODO

• Add test
• Check Fix deletion of schemas, microschemas. Fixes #589 #762