GraphQL Variables (list)

Users Dgraph
1

I am trying to figure out if DGraph supports a way to pass in a list of UIDs via the GraphQL Variables API call.

Examples:

This unfortunately does not work -

query GetStuff($uids: string = "0xa105,0xa11d,0xa101") {
  operators(func:type("Thing"))
  @filter(uid($uids))
  {    uid    name    }
}

This does work, but it doesn’t use variables:

query GetStuff {
  operators(func:type("Thing"))
  @filter(uid("0xa105","0xa11d","0xa101"))
  {    uid    name    }
}

This also works, although the uids are not even strings here.

query GetStuff {
  operators(func:type("Thing"))
  @filter(uid(0xa105,0xa11d,0xa101))
  {    uid    name    }
}

Any other alternatives that I can use? Or is there no escape other than building the big query string in my code and not using variables at all?

2

That feels like an enhancement, please fill up an issue.

3

Actually, nevermind, I’ve just remembered about this PR Support for Gql variable in arrays by srfrog · Pull Request #2981 · dgraph-io/dgraph · GitHub and I thought about testing the hypothesis on this issue. And it worked.

query GetStuff($uids: string = "[0x1,0x2,0xa101]") {
  operators(func: uid($uids)) {    
     uid    
     name
    }
}

Result

{
  "data": {
    "operators": [
      {
        "uid": "0x1"
      },
      {
        "uid": "0x2"
      },
      {
        "uid": "0xa101"
      }
    ]
  }
}
1 Like
4

Excellent! Thank you very much.