Pass argument child type graphql - graphql

Question

I would like to know how can I pass an argument in "child" type.
With the request, I would like to have only the message with id 1 from user id 1.
Currently I have this request :
{user(id:1){
email,
username,
messages(id:1){
text,
id
}
}}
I modified in the schema the User type, and changed
messages: [Message]
by
messages(id: Int): [Message]
But I have always all messages from user and not the message with specific id.
schema.js
import { gql } from 'apollo-server';
export const typeDefs = gql`
# declare custom scalars
scalar Date
##########
## TYPE ##
##########
# a group
type Group {
id: Int!
name: String
users: [User]!
messages: [Message]
}
# a user
type User {
id: Int! # unique id for the user
email: String!
username: String
messages(id: Int): [Message]
groups: [Group]
friends: [User]
}
# a message sent from a user to a group
type Message {
id: Int!
to: Group!
from: User!
text: String!
createdAt: Date!
}
###########
## QUERY ##
###########
# query for types
type Query {
user(email: String, id: Int): User
messages(groupId: Int, userId: Int): [Message]
}
schema {
query: Query
}
`;
export default typeDefs;
resolvers.js
import GraphQLDate from 'graphql-date';
import { Group, Message, User } from './connectors';
export const resolvers = {
Date: GraphQLDate,
Query: {
group(_, args) {
return Group.find({ where: args });
},
messages(_, args) {
return Message.findAll({
where: args,
order: [['createdAt', 'DESC']],
});
},
user(_, args) {
return User.findOne({ where: args });
},
},
Group: {
users(group) {
return group.getUsers();
},
messages(group) {
return Message.findAll({
where: { groupId: group.id },
order: [['createdAt', 'DESC']],
});
},
},
Message: {
to(message) {
return message.getGroup();
},
from(message) {
return message.getUser();
},
},
User: {
messages(user) {
return Message.findAll({
where: { userId: user.id },
order: [['createdAt', 'DESC']],
});
},
groups(user) {
return user.getGroups();
},
friends(user) {
return user.getFriends();
},
},
};
export default resolvers;

Answer 1

You have to update User.messages resolver. This way:
User: {
messages(user, { id }) {
return Message.findAll({
where: { userId: user.id, id },
order: [['createdAt', 'DESC']],
});
},
groups(user) {
return user.getGroups();
},
friends(user) {
return user.getFriends();
},
},
If you want to make id parameter optional, something like this may help:
messages(user, { id }) {
const where = { userId: user.id }
if (id) {
where.id = id
}
return Message.findAll({
where,
order: [['createdAt', 'DESC']],
});
},