Stack

Is very similar to Sync. Only with one difference. It will not delete anything.

Now lets try again and add groups that were previously dissociated from john.

Mutation

mutation ($user: UserInput) {  stackUser(user: $user) {    name    roles {      name    }    groups {      name    }  }}

Variables

{  "user": {    "name": "john_wayne",    "groups": [      {        "name": "Legends"      },      {        "name": "Oldschool"      }    ],    "roles": [      {        "name": "Smokers"      }    ]  }}

Response

{  "data": {    "stackUser": {      "name": "john_wayne",      "roles": [        {          "name": "Bad Boys"        },        {          "name": "Smokers"        }      ],      "groups": [        {          "name": "Sharks"        },        {          "name": "Legends"        },        {          "name": "Oldschool"        }      ]    }  }}

Great, it didn't delete anything. Mutation added Legends, and Oldschool groups and Smokers role to john_wayne user.