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Title
a
arsan.irianto
02/26/2019, 2:50 AMhello everyone, my graphql error with message : "Expected Iterable, but did not find one for field Team.players." how to solve this?. I will to query graphql client like this : query {
teams{
strTeam
players{
strPlayer
}
}
}
c
CCBCodeMonkey
02/26/2019, 5:25 AMsounds like team.players isn't returning the right type
looks to me like your players resolver is returning a single player
but your schema probably defines [player!]! or something
s
sandorTuranszky
02/26/2019, 7:47 AMHow does your resolver handle players?
j
Jenkins
02/26/2019, 7:47 AMI think you need to pass
parent.idfetchparenta
arsan.irianto
02/26/2019, 8:28 AMi added
parent.idTeam: {
players: parent => {
return fetch(`${urlPlayers}${parent.id}`).then(res => res.json()).then(res => res.player)
}
}c
CCBCodeMonkey
02/26/2019, 8:29 AMcan you add a console log
or something to see what is being returned from your API
you are returning null in that case
also its kind of nice to use
async awaitthensand you coud log what the different steps are returning
a
arsan.irianto
02/26/2019, 8:31 AM@CCBCodeMonkey in console log ->
{ player: 'Invalid Team ID passed' }c
CCBCodeMonkey
02/26/2019, 8:32 AMconst fetched = await fetch(...);
const { player } = await fetched.json();
return player;so you are passing something invalid...
what is
parent.idthis really has more to do with your sports API usage than graphql...
you are kind of wrong in a lot of places...
from what I see there isn't even a
playeroh nevermind ignore that, player is an array
weird API
a
arsan.irianto
02/26/2019, 8:36 AMin
parent.idurlLookupLeagueurlPlayersc
CCBCodeMonkey
02/26/2019, 8:36 AMbut what is parent.id in your players resolver
also what is your schema for players?
oh nm I see its in that file
I usually keep mine in a separate file
your query is like:
teams { players { id, strPlayer } }a
arsan.irianto
02/26/2019, 8:40 AMmy schema in code above
type Team {
id: ID!
strTeam: String!
players: [Player!]!
}c
CCBCodeMonkey
02/26/2019, 8:40 AMif you switch your query to this does it work?
teams { strTeam, id, players { id, strPlayer } }a
arsan.irianto
02/26/2019, 8:45 AM"message": "Cannot return null for non-nullable field Team.id."my complete scheme
type Query {
teams: [Team!]!
players(id: ID!): [Player!]!
}
type Team {
id: ID!
strTeam: String!
players: [Player!]!
}
type Player {
id: ID!
strPlayer: String!
}thanks for all respon,,, my problem solved now 😄
this my script now
const { GraphQLServer } = require('graphql-yoga')
const fetch = require('node-fetch')
const urlLookupLeague = `<https://www.thesportsdb.com/api/v1/json/1/lookup_all_teams.php?id=4328>`
const urlPlayers = `<https://www.thesportsdb.com/api/v1/json/1/lookup_all_players.php?id=>`
const typeDefs = `
type Query {
teams: [Team!]!
players(id: ID!): [Player!]!
}
type Team {
idTeam: ID!
strTeam: String!
players: [Player]
}
type Player {
idTeam: ID!
strPlayer: String!
}
`
const resolvers = {
Query: {
teams: () => {
return fetch(`${urlLookupLeague}`).then(res => res.json()).then(res => res.teams)
}
},
Team: {
players: parent => {
return fetch(`${urlPlayers}${parent.idTeam}`).then(res => res.json()).then(res => res.player)
}
}
}
const server = new GraphQLServer({
typeDefs,
resolvers,
})
server.start(() => console.log(`Server Running on <http://localhost:4000`>))