Cannot delete project that contains tests

[pashidlos]

Cannot reproduce for empty project

Steps

• Create project
• add at least one test
• try removing it

Error

core.js:9110 ERROR Error: Uncaught (in promise): Error: GraphQL error: 
Invalid `prisma.project.delete()` invocation in
/api/webpack:/apps/api/src/app/project/project.service.ts:20:45

Error occurred during query execution:
InterpretationError("Error for binding \'3\': RelationViolation(RelationViolation { relation_name: \"ProjectToTest\", model_a_name: \"Project\", model_b_name: \"Test\" })")
Error: GraphQL error: 
Invalid `prisma.project.delete()` invocation in
/api/webpack:/apps/api/src/app/project/project.service.ts:20:45

Error occurred during query execution:
InterpretationError("Error for binding \'3\': RelationViolation(RelationViolation { relation_name: \"ProjectToTest\", model_a_name: \"Project\", model_b_name: \"Test\" })")
    at new ApolloError (bundle.esm.js:63)
    at Object.next (bundle.esm.js:1004)
    at notifySubscription (Observable.js:130)
    at onNotify (Observable.js:165)
    at SubscriptionObserver.next (Observable.js:219)
    at bundle.esm.js:866
    at Set.forEach (<anonymous>)
    at Object.next (bundle.esm.js:866)
    at notifySubscription (Observable.js:130)
    at onNotify (Observable.js:165)
    at SubscriptionObserver.next (Observable.js:219)
    at Object.next (bundle.esm.js:29)
    at notifySubscription (Observable.js:130)
    at onNotify (Observable.js:165)
    at SubscriptionObserver.next (Observable.js:219)
    at resolvePromise (zone-evergreen.js:797) [angular]
    at polyfills-es2015.js:3556:17 [angular]
    at SafeSubscriber._error (Observable.js:91) [angular]
    at SafeSubscriber.__tryOrUnsub (Subscriber.js:185) [angular]
    at SafeSubscriber.error (Subscriber.js:137) [angular]
    at Subscriber._error (Subscriber.js:75) [angular]
    at Subscriber.error (Subscriber.js:55) [angular]
    at vendor-es2015.js:167261:28 [angular]
    at Object.onInvoke (core.js:34201) [angular]
    at polyfills-es2015.js:3704:36 [angular]

[MitkoTschimev]

prisma 2 has not supported cascade deletions ... maybe they support it now. We need to check this because this will make live so much easier :)

Otherwise we need to do this on our own and cascade for our self