new 1.0.11 version broke vars

[makitka2007]

prerequisites:

entity_key: string @index(exact) .
link_key: string @index(exact) .
link_agg_key: string @index(exact) .
r2mlink: uid @reverse .
m2mlink: uid @reverse .
w2mlink: uid @reverse .
i2wlink: uid @reverse .
r2mlink_agg: uid @reverse .
m2mlink_agg: uid @reverse .
attr_label: string @index(trigram) .
attr_description: string @index(trigram) .
dummy: string .

{
  set {
    _:entity <entity_key> "c8498990-fe19-11e8-bbf2-9bd27031db92" .
    _:entity <type_Instance> "" .
    _:entity <rel_0aa70b26-6c16-4337-96c9-730b78e8264f> "" .
    
    _:lnk <link_agg_key> "c8498990-fe19-11e8-bbf2-9bd27031db92|c8498990-fe19-11e8-bbf2-9bd27031db00" .
    _:entity <r2mlink_agg> _:lnk .
    _:lnk <r2mlink_agg> _:concept .

    
    _:concept <entity_key> "c8498990-fe19-11e8-bbf2-9bd27031db00" .
    _:concept <type_Concept> "" .
  }
}

query:

{
  initial_uid as var(func: eq(entity_key, ["c8498990-fe19-11e8-bbf2-9bd27031db92"])) @filter(has(type_Instance) and not(has(dummy)) and (has(rel_0aa70b26-6c16-4337-96c9-730b78e8264f)))


resources_uid as var (func: uid(initial_uid)) @filter()

var(func: uid(resources_uid)) {
links_uid as r2mlink
}

var(func: uid(resources_uid)) {
r2mlink_agg {
metadata_Concept as r2mlink_agg @filter(has(type_Concept) and not(has(dummy)))
}
}

var(func: uid(metadata_Concept)) @cascade {
m2mlink_agg {
cnt_m_Concept as math(1)
m2mlink_agg {
~r2mlink_agg {
~r2mlink_agg @filter(has(rel_0aa70b26-6c16-4337-96c9-730b78e8264f))
}
}
}
metadata_count_Concept as sum(val(cnt_m_Concept))
}

Concept(func: uid(metadata_Concept), offset : 0, first: 13) {
entityKey: entity_key
attrLabel: attr_label
attrDescription:  attr_description
entityType: entity_type
labels: ~r2mlink @filter(uid(links_uid)) {
label
}
metadataLinksCount: val(metadata_count_Concept)
}

}

result:

{
    "errors": [
        {
            "code": "ErrorInvalidRequest",
            "message": "Wrong use of var() with [{metadata_count_Concept 2}]."
        }
    ],
    "data": null
}

on 1.0.10 it worked fine. please, add unit tests/regression or something else not to break existing functionality

[danielmai]

For the record, in v1.0.10, the query from the cluster setup described in this issue returns this:

{
  "data": {
    "Concept": [
      {
        "entityKey": "c8498990-fe19-11e8-bbf2-9bd27031db00"
      }
    ]
  }
}

Only entityKey is returned from this example data set. The other requested predicates are not in the response (e.g., attrLabel, metadataLinksCount).

[srfrog]

@makitka2007 please try your query in master, a solution was merged.