_:company (dept_name="上海研发中心") .
}
}
```
query:
```auto
{
query(func:uid(0x02)) {
uid
name
one:~candidate_company @facets(eq(dept_name, "上海研发中心")) {
count(uid)
}
}
}
```
result:
```auto
{
"data": {
"query": [
{
"uid": "0x2",
"name": "百度",
"one": [
{
"count": 1
}
]
}
]
},
"extensions": {
"server_latency": {
"parsing_ns": 24811,
"processing_ns": 146292,
"encoding_ns": 961954
},
"txn": {
"start_ts": 22,
"lin_read": {
"ids": {
"1": 8
}
}
}
}
}
```
but with queryWithVars:
```auto
query withvar($a:string,$b:string){
query(func:uid($a)) {
uid
name
one:~candidate_company @facets(eq(dept_name, $b)) {
count(uid)
}
}
}
```
only return
```auto
{"query":[{"uid":"0x2","name":"百度"}]}
```
it seems that it’s not the different between “$b” and $b
@MichelDiz
what do you think of this?
---
### Author:  [@BlankRain](https://discuss.dgraph.io/u/BlankRain)
#### Post date: [June 26, 2018, 10:35am UTC](https://discuss.dgraph.io/t/query-and-querywithvars/2796/4 "2018-06-26T10:35:02Z")
seems like a bug~
you can create a new issue
---
### Author:  [@MichelDiz](https://discuss.dgraph.io/u/MichelDiz)
#### Post date: [June 26, 2018, 3:50pm UTC](https://discuss.dgraph.io/t/query-and-querywithvars/2796/5 "2018-06-26T15:50:37Z")
Maybe the $ b field is wrong, or is passing some extra character. If this field is wrong the answer will be empty indeed. You have to make sure you are correctly passing the Var. btw this is a “GraphQL Variable”, It is not a Dgraph variable itself.
For test effect, try to see if searching $ b for dept\_name, returns the correct department.
```auto
{
dept(func: eq(dept_name, $b)) {
uid
expand(_all_)
}
}
```
It would be interesting to be able to expand the variable within the query field. But at the moment I can not test, I’m just with Ratel to test things fast. And Ratel does not apparently accept Graphql Var.
> I was digging here [dgraph/systest/mutations\_test.go at master · dgraph-io/dgraph · GitHub](https://github.com/dgraph-io/dgraph/blob/master/systest/mutations_test.go)
> to see if there was anything that might help
---
### Author:  [@shanghai-Jerry](https://discuss.dgraph.io/u/shanghai-Jerry)
#### Post date: [June 27, 2018, 2:03am UTC](https://discuss.dgraph.io/t/query-and-querywithvars/2796/6 "2018-06-27T02:03:55Z")
i am sure there is not passing some extra character, and i found it might be a bug filter in facets. look this query:
```auto
query withvar($a:string,$b:string,$c:string){
query(func:uid($a)) {
uid
name
one:~candidate_company @facets(eq(dept_name, "$b")) {
count(uid)
}
~candidate_company @filter(eq(name, "$c")) {
uid
name
}
}
}
```
with vars:
```auto
vars.put("$a", "0x02");
vars.put("$b", "ai");
vars.put("$c", "jerry");
```
result:
```auto
{"query":[{"uid":"0xb","name":"百度","~candidate_company":[{"uid":"0xa","name":"jerry"}]}]}
```
---
### Author:  [@MichelDiz](https://discuss.dgraph.io/u/MichelDiz)
#### Post date: [June 27, 2018, 2:11am UTC](https://discuss.dgraph.io/t/query-and-querywithvars/2796/7 "2018-06-27T02:11:02Z")
Okay, Fill a issue on Github. As you tested with common characters (and not Chinese) already helped filter out a possible bug with characters. Sounds like a valid issue. Even so, I’ll do tests during this.
---
### Author:  [@MichelDiz](https://discuss.dgraph.io/u/MichelDiz)
#### Post date: [July 1, 2018, 2:06am UTC](https://discuss.dgraph.io/t/query-and-querywithvars/2796/8 "2018-07-01T02:06:19Z")
Hey, can you test this with the last release? cuz there is a new Support for GraphQL vars. Can be related.
> Support GraphQL vars with filters. #2359
> [Support GraphQL variables with filters. by pawanrawal · Pull Request #2359 · dgraph-io/dgraph · GitHub](https://github.com/dgraph-io/dgraph/pull/2359)
> Support GraphQL vars as args for Regexp function. #2353
> [Support GraphQL variables as args for regexp function by pawanrawal · Pull Request #2353 · dgraph-io/dgraph · GitHub](https://github.com/dgraph-io/dgraph/pull/2353)
> **[Releases · dgraph-io/dgraph](https://github.com/dgraph-io/dgraph/releases)**
>
> The high-performance database for modern applications - dgraph-io/dgraph
Cheers.
---
### Author:  [@shanghai-Jerry](https://discuss.dgraph.io/u/shanghai-Jerry)
#### Post date: [July 1, 2018, 2:56am UTC](https://discuss.dgraph.io/t/query-and-querywithvars/2796/9 "2018-07-01T02:56:52Z")
bad news, it’s still not working in facets : predicate @facets(eq(dept\_name, “$b”)) {
…
}
but it works in this way: predicate @filter(gt(birthday, “$b”)) {
…
}
---
### Author:  [@BlankRain](https://discuss.dgraph.io/u/BlankRain)
#### Post date: [July 3, 2018, 9:13am UTC](https://discuss.dgraph.io/t/query-and-querywithvars/2796/10 "2018-07-03T09:13:21Z")
> [@MichelDiz](#):
>
> I’m just with Ratel to test things fast. And Ratel does not apparently accept Graphql Var.
@MichelDiz
as example showed in [Query Structure - Dgraph](https://docs.dgraph.io/query-language/#graphql-variables)
you can use curl to write some scripts to do this job.
```auto
curl localhost:8080/query -XPOST -H 'X-Dgraph-Vars: {"$b": "10", "$name": "Steven Spielberg"}' -d '
query test($a: int = 2, $b: int!, $name: string) {
me(func: allofterms(name@en, $name)) {
director.film (first: $a, offset: $b) {
genre(first: $a) {
name@en
}
}
}
}' | python -m json.tool | less
```
---
### Author:  [@MichelDiz](https://discuss.dgraph.io/u/MichelDiz)
#### Post date: [July 3, 2018, 3:45pm UTC](https://discuss.dgraph.io/t/query-and-querywithvars/2796/11 "2018-07-03T15:45:23Z")
Yes Yes. This example has problems to play online. I forgot what I could do it locally. It’s just that you were using your own examples, which I do not have access to. Then my head did not stop to reproduce something close. But I can mount an instance by loading the RDF movielens and test this.
---
### Author:  [@shanghai-Jerry](https://discuss.dgraph.io/u/shanghai-Jerry)
#### Post date: [July 11, 2018, 3:44am UTC](https://discuss.dgraph.io/t/query-and-querywithvars/2796/12 "2018-07-11T03:44:17Z")
i have a query like this:
query withvar($a:string, $b:string) {
var(func:uid($a)) {
company\_dept @filter(uid($b)){
~candidate\_dept @groupby(age\_node) {
a as count(uid)
}
}
}
query(func:uid(a)) {
uid
name
total:val(a)
}
}
,
if i don’t pass var $b, like it’s a empty string, and i want to let this filter: @filter(uid($b)) do not work in this query,
or what var should i pass to $b to let filter don’t work.
how to do this?
---
### Author:  [@MichelDiz](https://discuss.dgraph.io/u/MichelDiz)
#### Post date: [July 11, 2018, 2:37pm UTC](https://discuss.dgraph.io/t/query-and-querywithvars/2796/13 "2018-07-11T14:37:45Z")
I did not fully understand the question, but look.
In that case I think that in your application I could deal with this by creating one more query if that one it is not successful. Like:
```auto
If (company_dept.length === 0) {
doNextquerie();
}
```
The next query would be a predictable one, keeping in mind that it does not have the value used in company\_dept.
---
### Author:  [@shanghai-Jerry](https://discuss.dgraph.io/u/shanghai-Jerry)
#### Post date: [July 12, 2018, 4:03am UTC](https://discuss.dgraph.io/t/query-and-querywithvars/2796/14 "2018-07-12T04:03:30Z")
yes, but i want to combine in one query.
if it’s not possible, one or more query will be great