[英]GraphQL: Error: Schema query must be Object Type but got: [object Object]
I'm currently trying to inherit schemas for a rootQuery in order to get more modularity. 我目前正在尝试继承rootQuery的模式,以获得更多的模块化。 The setup currently looks as follows:
设置目前如下所示:
invoiceSchema.js invoiceSchema.js
import {
GraphQLObjectType,
GraphQLInt,
} from 'graphql';
export default new GraphQLObjectType({
name: 'Invoice',
description: 'A monthly billing invoice for an organization',
fields: () => ({
amountDue: {
type: GraphQLInt,
description: 'The amount the card will be charged (total + startingBalance with a min value of 0)'
},
})
});
rootQuery.js rootQuery.js
import {
GraphQLObjectType,
GraphQLString,
GraphQLInt,
GraphQLList,
GraphQLID
} from 'graphql';
import Invoice from './invoiceSchema';
export default {
Invoice: {
type: Invoice,
resolve(parentValue, args){
return 'Hello world';
}
}
};
schema.js schema.js
import query from './rootQuery';
import {GraphQLSchema} from 'graphql';
export default new GraphQLSchema({query});
When trying to do the following error and hoped for some help and insight, as what I'm exporting in invoiceSchema.js is clearly an ObjectType and not an object Object. 当尝试执行以下错误并希望得到一些帮助和见解时,因为我在invoiceSchema.js中导出的内容显然是ObjectType而不是对象Object。
C:\project\node_modules\graphql\jsutils\invariant.js:19
throw new Error(message);
^
Error: Schema query must be Object Type but got: [object Object].
at invariant (C:\project\node_modules\graphql\jsutils\invariant.js:19:11)
at new GraphQLSchema (C:\project\node_modules\graphql\type\schema.js:72:88)
at Object.<anonymous> (C:/project/api/schema/schema.js:6:16)
at Module._compile (module.js:573:30)
at loader (C:\project\node_modules\babel-register\lib\node.js:144:5)
at Object.require.extensions.(anonymous function) [as .js] (C:\project\node_modules\babel-register\lib\node.js:154:7)
at Module.load (module.js:507:32)
at tryModuleLoad (module.js:470:12)
at Function.Module._load (module.js:462:3)
at Module.require (module.js:517:17)
[nodemon] app crashed - waiting for file changes before starting...
Actually got the idea from here and I'm wondering why it doesn't work... 实际上从这里得到了这个想法,我想知道为什么它不起作用......
Your root query needs to be an instance of GraphQLObjectType
, however, rootQuery.js
is exporting a plain Object instead. 您的根查询需要是
GraphQLObjectType
的实例,但是, rootQuery.js
正在导出普通的Object。 You'll need to change your export to something like this: 您需要将导出更改为以下内容:
export default new GraphQLObjectType({
name: 'RootQuery',
fields: () => ({
invoice: {
type: Invoice,
resolve(parentValue, args){
return 'Hello world';
}
}
})
};
Note: it's common practice to keep all field names, including query and mutation names, in camelCase and use PascalCase for type names, to help distinguish between the two. 注意:通常的做法是将所有字段名称(包括查询和变异名称)保存在camelCase中,并使用PascalCase作为类型名称,以帮助区分这两者。
Also, if you are modularizing your schema, you may find it helpful to utilize graphql-tools
for generating your schema instead. 此外,如果您正在模块化模式,您可能会发现使用
graphql-tools
来生成模式会很有帮助。 IMO, it makes your schema more readable and helps avoid some of the more common pitfalls you may face when modularizing a schema. IMO,它使您的架构更具可读性,并有助于避免在模块化模式时可能遇到的一些更常见的陷阱。 The docs have a great example of how to modularize your schema with
makeExecutableSchema
here . 该文件对如何使用您的模块化架构一个很好的例子
makeExecutableSchema
这里 。
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