Sorting does not sort variables and first does not paginate properly

Issues Dgraph
, ,
4

arijitAD commented :

https://dgraph.io/docs/query-language/#query-variables
From docs.

Value variables store scalar values. Value variables are a map from the UIDs of the enclosing block to the corresponding values. It therefore only makes sense to use the values from a value variable in a context that matches the same UIDs - if used in a block matching different UIDs the value variable is undefined.

The query is fixed by replacing func: uid(totalLikes) in query.
The following seems to work.
Data:

{
"set": [
    {
        "uid": "_:lesson1",
        "dgraph.type": "Lesson",
        "Lesson.reviews": [{ "uid": "_:review1" }, { "uid": "_:review2" }]
    },
    {
        "uid": "_:review1",
        "dgraph.type": "Review",
        "Lesson.liked": true
    },
    {
        "uid": "_:review2",
        "dgraph.type": "Review",
        "Lesson.liked": true
    },
    {
        "uid": "_:lesson2",
        "dgraph.type": "Lesson",
        "Lesson.reviews": [{ "uid": "_:review3" }, { "uid": "_:review4" }]
    },
    {
        "uid": "_:review3",
        "dgraph.type": "Review",
        "Lesson.liked": true
    },
    {
        "uid": "_:review4",
        "dgraph.type": "Review",
        "Lesson.liked": false
    },
    {
        "uid": "_:lesson3",
        "dgraph.type": "Lesson",
        "Lesson.reviews": [{ "uid": "_:review5" }]
    },
    {
        "uid": "_:review5",
        "dgraph.type": "Review",
        "Lesson.liked": false
    },
    {
        "uid": "_:lesson4",
        "dgraph.type": "Lesson"
    },
    {
        "uid": "_:lesson5",
        "dgraph.type": "Lesson"
    }
    ]
}

and I have used this query.

{
  var(func: type(Lesson)) {
    uid
    Lesson.reviews @filter(eq(Lesson.liked, true)) {
      uid
    }
    totalLikes as count(Lesson.reviews)
  }

  q(func: uid(totalLikes), orderdesc: val(totalLikes)) {
    uid
    totalLikes: val(totalLikes)
  }
}