johnbiundo/bug-graphql-subscrip

Issue

Adding a subscription triggered by a mutation; returns data: null in the subscription when a correct mutation succeeds.

Install

Usual install npm i

Subscription and Mutation queries

Once installed and running, you can reproduce the bug by subscribing as shown below and running the mutation shown below in the playground on localhost:3000/graphql

"""
subscription
"""

subscription custAdd {
  custAdded {
    firstName
    lastName
  }
}

"""
mutation
"""

mutation addCustomer($cust: NewCustomer!)
{
  addCustomer(newCustomer: $cust) {
    id
    email
    firstName
    lastName
  }
}

"""
input object for addCustomer mutation
"""

{
   "cust": {
    "firstName": "Bill",
    "lastName": "Jones",
    "email": "billjones@email.com"
   }
 }