bad request when adding a child to a parent and child has no reference to parent

[abstratt]

Note the undefined link to parent. Note also the request was made without a parent as context:

POST http://localhost/services/api-v2/demo-cloudfier-apps-auto-crm/entities/autocrm.Oportunidade/instances/

{
  "values":{
    "data":"2017-12-21",
    "interesse":"Venda"
  },
  "links":{
    "undefined":{
      "objectId":"1",
      "typeRef":{
        "entityNamespace":"autocrm",
        "kind":"Entity",
        "typeName":"Contato",
        "fullName":"autocrm.Contato"
      }
    }
  },
  "typeRef":{
    "entityNamespace":"autocrm",
    "typeName":"Oportunidade"
  }
}

[abstratt]

Caused by the use of an inlined composition. Since only the parent->child role is named, the child->parent role gets no name, causing havoc. Workaround was to declare a top-level composition.