建议的schema

[myWsq]

enum Role {
	ADMIN
	CUSTOMER
}

type User {
	_id: String!
	idCard: String!
	phone: String!
	name: String!
	address: String!
	role: [Role!]!
	createdAt: Int! #timestamp
	updateAt: Int!
}

enum OrderCategory {
	CUSTOMER
	SELLER
}

type Order {
	_id: String!
	price: Float!
	amount: Int!
	type: String!
	category: OrderCategory!
	matches(limit: Int): [Match!]! # 默认以score降序排序
	user: User!
	deadline: Int
	createdAt: Int!
	updateAt: Int!
}

type Match {
	_id: String!
	sellerOrder: Order!
	customerOrder: Order!
	signed: Boolean!
	matchScore: Int! #0-100
	createdAt: Int!
	updateAt: Int!
}

type Query {
	customerOrders: [Order!]!
	sellerOrders: [Order!]!
	matches: [Match!]!
	me: User!
}

input createOrderInput {
	price: Float!
	amount: Int!
	type: String!
	category: OrderCategory!
	user: User!
	deadline: Int
}

type Mutation {
	createOrder(data: createOrderInput): Order!
	finishMatch(_id: String!): Match!
	login(username: String!, password: String!): User!
	logout: User!
}

enum OP {
	CREATE
	UPDATE
	DELETE
}

type MatchSubcriptionPayLoad {
	op: OP!
	data: Match!
}

type Subscription {
	matchState: Boolean! # 后台是否在进行匹配
	match: MatchSubcriptionPayLoad! # 匹配列表变化情况
}