Using "orderdesc" & "orderasc" returns nothing or incorrect result

Users Dgraph
1

I have a predicate like this:

product.price: int @index(int) .

In my database, most of the products have zero(0) value for this predicate. When I use “orderdesc” or “orderasc” in my query, dgraph just returns products that are not zero for this predicate, but when I delete these functions from my query, dgraph returns result correctly. Is this a bug or I did not understand these functions correctly?

2

Hi Samadadi,

It seems to me that everything is normal, see the tests below. Something you are doing is wrong, please give more details of what you are doing.

Mutation

{
  set {
    _:Test <product.price> "0" .
    _:Test2 <product.price> "0" .
    _:Test3 <product.price> "2" .
    _:Test4 <product.price> "4" .
    _:Test5 <product.price> "88" .
    _:Test6 <product.price> "9" .
    _:Test7 <product.price> "0" .
    _:Test8 <product.price> "0" .
    _:Test9 <product.price> "200" .
    _:Test10 <product.price> "4" .
    _:Test11 <product.price> "8" .
    _:Test12 <product.price> "9" .
    _:Test13 <product.price> "0" .
    _:Test14 <product.price> "0" .
    _:Test15 <product.price> "25" .
    _:Test16 <product.price> "4" .
    _:Test17 <product.price> "8" .
    _:Test18 <product.price> "90" .
    _:Test19 <product.price> "90" .
  }
}

Query 1


{
  prices (func: has(product.price), orderdesc:product.price ){
    uid
    product.price
  }
}

Result

{
  "data": {
    "prices": [
      {
        "uid": "0xd",
        "product.price": 200
      },
      {
        "uid": "0x1",
        "product.price": 90
      },
      {
        "uid": "0x10",
        "product.price": 90
      },
      {
        "uid": "0x2",
        "product.price": 88
      },
      {
        "uid": "0xa",
        "product.price": 25
      },
      {
        "uid": "0x3",
        "product.price": 9
      },
      {
        "uid": "0x9",
        "product.price": 9
      },
      {
        "uid": "0x6",
        "product.price": 8
      },
      {
        "uid": "0xf",
        "product.price": 8
      },
      {
        "uid": "0xe",
        "product.price": 4
      },
      {
        "uid": "0x11",
        "product.price": 4
      },
      {
        "uid": "0x13",
        "product.price": 4
      },
      {
        "uid": "0x7",
        "product.price": 2
      },
      {
        "uid": "0x4",
        "product.price": 0
      },
      {
        "uid": "0x5",
        "product.price": 0
      },
      {
        "uid": "0x8",
        "product.price": 0
      },
      {
        "uid": "0xb",
        "product.price": 0
      },
      {
        "uid": "0xc",
        "product.price": 0
      },
      {
        "uid": "0x12",
        "product.price": 0
      }
    ]
  }

Query 1


{
  prices (func: has(product.price), orderasc:product.price ){
    uid
    product.price
  }
}

Result

{
  "data": {
    "prices": [
      {
        "uid": "0x4",
        "product.price": 0
      },
      {
        "uid": "0x5",
        "product.price": 0
      },
      {
        "uid": "0x8",
        "product.price": 0
      },
      {
        "uid": "0xb",
        "product.price": 0
      },
      {
        "uid": "0xc",
        "product.price": 0
      },
      {
        "uid": "0x12",
        "product.price": 0
      },
      {
        "uid": "0x7",
        "product.price": 2
      },
      {
        "uid": "0xe",
        "product.price": 4
      },
      {
        "uid": "0x11",
        "product.price": 4
      },
      {
        "uid": "0x13",
        "product.price": 4
      },
      {
        "uid": "0x6",
        "product.price": 8
      },
      {
        "uid": "0xf",
        "product.price": 8
      },
      {
        "uid": "0x3",
        "product.price": 9
      },
      {
        "uid": "0x9",
        "product.price": 9
      },
      {
        "uid": "0xa",
        "product.price": 25
      },
      {
        "uid": "0x2",
        "product.price": 88
      },
      {
        "uid": "0x1",
        "product.price": 90
      },
      {
        "uid": "0x10",
        "product.price": 90
      },
      {
        "uid": "0xd",
        "product.price": 200
      }
    ]
  }
3

Hi, thank you for your response. I found the problem. The problem was in my json encoding section. I had “omitempty” tag in my struct definition. So as a result there was no predicate related to most of the products. So the query could not return such products.