问题描述
我目前正在尝试为rootQuery继承架构,以获得更多的模块化.当前的设置如下:
I'm currently trying to inherit schemas for a rootQuery in order to get more modularity. The setup currently looks as follows:
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});
当尝试执行以下错误并希望获得一些帮助和见解时,因为我在invoiceSchema.js中导出的内容显然是ObjectType而不是对象Object.
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.
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...
实际上是从此处得到的,我我想知道为什么它不起作用...
Actually got the idea from here and I'm wondering why it doesn't work...
推荐答案
您的根查询必须是 GraphQLObjectType
的实例,但是, rootQuery.js
会导出一个普通对象.您需要将导出更改为以下内容:
Your root query needs to be an instance of GraphQLObjectType
, however, rootQuery.js
is exporting a plain Object instead. You'll need to change your export to something like this:
export default new GraphQLObjectType({
name: 'RootQuery',
fields: () => ({
invoice: {
type: Invoice,
resolve(parentValue, args){
return 'Hello world';
}
}
})
};
注意:通常的做法是将所有字段名称(包括查询和突变名称)保留在camelCase中,并使用PascalCase作为类型名称,以帮助区分两者.
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.
此外,如果您要对架构进行模块化,则使用 graphql-tools
用于生成您的架构.IMO,它使您的模式更具可读性,并有助于避免在对模式进行模块化时可能遇到的一些更常见的陷阱.该文档提供了一个很好的示例,说明了如何使用 makeExecutableSchema
此处.
Also, if you are modularizing your schema, you may find it helpful to utilize graphql-tools
for generating your schema instead. IMO, it makes your schema more readable and helps avoid some of the more common pitfalls you may face when modularizing a schema. The docs have a great example of how to modularize your schema with makeExecutableSchema
here.
这篇关于GraphQL:错误:模式查询必须是对象类型,但是得到:[对象对象]的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持!