我想设计一个graphQl模式,其中两种类型是相互依赖的。基本上我有一个数据库结构,其中:
User.hasOne(Search)
我希望能够像这样进行graphQl查询:
// note that 'me' has User type
// search has Search type
query{
me{
email,
search{
content,
user{
id
}
}
}
}
因此,您看到我们请求User
,其Search
和User
拥有此Search
(在这种情况下,这根本没有用)。
以下是UserType
:
import {
GraphQLObjectType as ObjectType,
GraphQLID as ID,
GraphQLString as StringType,
GraphQLNonNull as NonNull,
GraphQLInt as IntType,
} from 'graphql';
const UserType = new ObjectType({
name: 'User',
fields: {
id: { type: new NonNull(ID) },
username: { type: StringType },
search: {
type: SearchType,
resolve(user){
return user.getSearch();
}
},
},
});
以下是我对SearchType
:
const SearchType = new ObjectType({
name: 'Search',
fields: {
id: { type: new NonNull(ID) },
user: {
type: UserType,
resolve(search){
return search.getUser();
}
},
content: { type: StringType },
},
});
不幸的是,这不起作用,我想由于UserType
ans SearchType
之间的相互依赖,我得到以下错误:
User.search field type must be Output Type but got: function type() {
return _SearchType2.default;
}
我有没有办法在User
和Search
之间实现这种相互依赖?
答案 0 :(得分:3)
从此页面http://graphql.org/graphql-js/type/#graphqlobjecttype 了解PersonType如何依赖于自身?
var PersonType = new GraphQLObjectType({
name: 'Person',
fields: () => ({
name: { type: GraphQLString },
bestFriend: { type: PersonType },
})
});
你要找的东西是
fields: () => ({
...
})