Closed ChrisMichaelPerezSantiago closed 4 years ago
luna215
commented
5 years ago I'm getting a similar error. My guess is it has to do with the way I am stitching my schema. I only say this because I made a smaller version of my union example in a separate file where I keep my resolvers and type defs in the same file and it seemed to work.
Have you tried putting your type definitions and resolvers in the same file? I'm surprised more people haven't encountered this error.
baldmountain
commented
5 years ago I don't think you can just return null from your __resolveType method. I think you need to actually figure out if it is a Series or Movie and return that instead of null. See this page: https://www.apollographql.com/docs/apollo-server/schema/unions-interfaces/#union-type
luna215
commented
5 years ago I think I might have solved this issue. Inside your __resolveType make sure you're returning a string value that matches your union type.
For example, if your resolveType decides a Series type then make sure your resolveType returns 'Series'. Does that make sense?
ChrisMichaelPerezSantiago
commented
5 years ago Hello @luna215 and friends,
I still can't figure out the problem at all. Here I leave the changes I have made and the new error that shows me. Apparently I'm close to getting the results ..
Playground
query{
search(query: "elite"){
... on SMovies{
id
title
poster
sinopsis
type
extra{
air_date
}
}
... on SSeries{
id
title
poster
sinopsis
type
extra{
channel
}
}
}
}resolvers.js
const resolvers = {
Search:{
__solverType(obj , context , info){
if(obj.type === 'pelicula') return SMovies
if(obj.type === 'serie') return SSeries
}
},
SMovies:{
__isTypeOf(obj , context , info){
return Object.prototype.hasOwnProperty.call(obj, 'id');
}
},
SSeries:{
__isTypeOf(obj , context , info){
return Object.prototype.hasOwnProperty.call(obj, 'id');
}
},
MovieExtra:{
__isTypeOf(obj , context , info){
return Object.prototype.hasOwnProperty.call(obj , 'air_date')
}
},
SerieExtra:{
__isTypeOf(obj , context , info){
return Object.prototype.hasOwnProperty.call(obj , 'channel')
}
},
Query: {
search: async(_source , {query} , { dataSources}) =>{
return dataSources.API.search(query)
.then(doc => {
return doc.content;
})
},
}
};
module.exports = resolvers;error
{
"errors": [
{
"message": "Expected value of type \"MovieExtra\" but got: { channel: \"Netflix\", first_air_date: \" First air date Oct. 05, 2018\", last_air_date: \" Última transmisión Oct. 05, 2018\", total_seasons: \"1\", total_episodes: \"8\", season_list: [[Object], [Object]], cast_members: { creator: [Object], members_list: [Array] }, similar_series: [[Object], [Object], [Object], [Object], [Object], [Object], [Object], [Object], [Object], [Object], ... 2 more items] }.",
"locations": [
{
"line": 9,
"column": 7
}
],
"path": [
"search",
0,
"extra",
0
],
"extensions": {
"code": "INTERNAL_SERVER_ERROR",
"exception": {
"message": "Expected value of type \"MovieExtra\" but got: { channel: \"Netflix\", first_air_date: \" First air date Oct. 05, 2018\", last_air_date: \" Última transmisión Oct. 05, 2018\", total_seasons: \"1\", total_episodes: \"8\", season_list: [[Object], [Object]], cast_members: { creator: [Object], members_list: [Array] }, similar_series: [[Object], [Object], [Object], [Object], [Object], [Object], [Object], [Object], [Object], [Object], ... 2 more items] }.",
"locations": [
{
"line": 9,
"column": 7
}
],
"stacktrace": [
"GraphQLError: Expected value of type \"MovieExtra\" but got: { channel: \"Netflix\", first_air_date: \" First air date Oct. 05, 2018\", last_air_date: \" Última transmisión Oct. 05, 2018\", total_seasons: \"1\", total_episodes: \"8\", season_list: [[Object], [Object]], cast_members: { creator: [Object], members_list: [Array] }, similar_series: [[Object], [Object], [Object], [Object], [Object], [Object], [Object], [Object], [Object], [Object], ... 2 more items] }.",
" at invalidReturnTypeError (C:\\Users\\c\\Desktop\\cinemanight-graphql\\node_modules\\graphql\\execution\\execute.js:707:10)",
" at completeObjectValue (C:\\Users\\c\\Desktop\\cinemanight-graphql\\node_modules\\graphql\\execution\\execute.js:699:13)",
" at completeValue (C:\\Users\\c\\Desktop\\cinemanight-graphql\\node_modules\\graphql\\execution\\execute.js:591:12)",
" at completeValue (C:\\Users\\c\\Desktop\\cinemanight-graphql\\node_modules\\graphql\\execution\\execute.js:557:21)",
" at completeValueCatchingError (C:\\Users\\c\\Desktop\\cinemanight-graphql\\node_modules\\graphql\\execution\\execute.js:495:19)",
" at C:\\Users\\c\\Desktop\\cinemanight-graphql\\node_modules\\graphql\\execution\\execute.js:618:25",
" at Array.forEach (<anonymous>)",
" at forEach (C:\\Users\\c\\Desktop\\cinemanight-graphql\\node_modules\\iterall\\index.js:83:25)",
" at completeListValue (C:\\Users\\c\\Desktop\\cinemanight-graphql\\node_modules\\graphql\\execution\\execute.js:614:24)",
" at completeValue (C:\\Users\\c\\Desktop\\cinemanight-graphql\\node_modules\\graphql\\execution\\execute.js:573:12)"
]
}
}
}
],
"data": null
}Is __solverType similar to __resolveType?
Try changing your code for __solverType to:
__solverType(obj , context , info){ if(obj.type === 'pelicula') return 'SMovies' if(obj.type === 'serie') return 'SSeries' }
See if that works.
ChrisMichaelPerezSantiago
commented
5 years ago Hello @luna215,
Sorry, I made the change from __solverType to __resolveType, it was a syntax error.
But even so, it shows me the same error made in the previous dialogue.
But something that I noticed
console.log ('obj:', obj)It doesn't show me anything, it's as if resolver Search didn't do anything.
Search:{
__resolveType(obj , context , info){
console.log('obj: ' , obj)
if(obj.type === 'pelicula') return 'SMovies'
if(obj.type === 'serie') return 'SSeries'
}
},
seyedasfar
commented
4 years ago When using unions, you will have to return a __typename so apollo-server knows which type the result has and which resolver map must be used for resolving further field values of the resolved type.
search query must be something like below
Query: {
search: async (_source, { query }, { dataSources }) => {
const data = dataSources.API.search(query)
if (data.name === 'Series') return {
__typename: 'Series',
...data
}
if (data.name === 'Movies') {
__typename: 'Movies',
...data
}
}
}
MarshHawk
commented
4 years ago Simplest (fewest extra lines of code) solution follows:
const resolvers = {
Search:{
__resolveType(parent) {
return parent.constructor.name
}
},
SMovies:{
...
},
SSeries:{
...
},
MovieExtra:{
...
},
SerieExtra:{
...
},
Query: {
search: async(_source , {query} , { dataSources}) =>{
return dataSources.API.search(query)
.then(doc => {
return doc.content;
})
},
}
};
module.exports = resolvers;No Need for __typename: or _isTypeOf:
m-lautenbach
commented
4 years ago For us somehow only __typename worked, but __resolveType didn't (even when returning a static string; using graphql-tools)
m-lautenbach
commented
4 years ago works:
Boq: () => ({
elements: () => [
{
priceEstimate: (): BoqPositionPriceEstimate => ({
min: 2000,
max: 7000,
}),
},
],
}),
// force line items to be always be positions,
// otherwise we randomly might not get any and the test fails
BoqLineItem: () => ({
__typename: 'BoqPosition',
}),doesn't work
Boq: () => ({
elements: () => [
{
priceEstimate: (): BoqPositionPriceEstimate => ({
min: 2000,
max: 7000,
}),
},
],
}),
// force line items to be always be positions,
// otherwise we randomly might not get any and the test fails
BoqLineItem: () => ({
__resolveType: () => 'BoqPosition',
}),(we wanted to force one type on an array of union typed elements)
helo friends,
Someone who can help me solve a problem in Apollo Graphql. I have implemented a search query that receives a parameter that is the title to search, the problem I have is that it shows me the following error:
_The return type of the search is a union of the type Series | Movies_
❤️ Any help will be more than received, I've been trying to solve the problem for a couple of weeks.
Query
resolvers
Playground
Error