json - GraphQL filter data by key values (e.g. users age must be 31) -

i'm new graphql , i'm stuck on rather simple problem i've yet find documentation for.

the thing i'm trying list of users json have age key set 31. can users doing:

{   user {     name     age   } } 

but want users aged 31 , think need do, doesn't work, is:

{   user(age: 31) {     name     age   } } 

i same results, need enable age: 31 "filter"?

schema

var mygraphqlschema = buildschema(`   type query {     user(age: int): [user]   }   type user {     id: int     name: string     age: int   } `); 

json data

var root = {   "user": [     {       "id": 1,       "name": "binni",       "age": 31     },     {       "id": 2,       "name": "viddi",       "age": 31     },     {       "id": 3,       "name": "mási",       "age": 32     }   ] } 

graphql server

graphqlhttp({   schema: mygraphqlschema,   rootvalue: root,   graphiql: true }) 

i'm using graphql.js , koa-graphql (which similiar express-graphql).

query results

{   "data": {     "user": [       {         "name": "binni",         "age": 31       },       {         "name": "viddi",         "age": 31       },       {         "name": "mási",         "age": 32       }     ]   } } 

you need implement user ecmascript function, instead of array.

var users = [       {         "name": "binni",         "age": 31       },       {         "name": "viddi",         "age": 31       },       {         "name": "mási",         "age": 32       }     ]   var root = {   "user": ({age}) =>             age === null? users:                           users.filter(user => user.age === age) } 

see http://graphql.org/graphql-js/passing-arguments/ reference.