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原文链接
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上一篇【Next.js 项目实战系列】06-身份验证
分配 Issue 给用户
本节代码链接
Select Button
# /app/issues/[id]/AssigneeSelect.tsx"use client";
import { Select } from "@radix-ui/themes";const AssigneeSelect = () => {return (<Select.Root><Select.Trigger placeholder="Assign..." /><Select.Content><Select.Group><Select.Label>Suggestions</Select.Label><Select.Item value="1">Castamere</Select.Item></Select.Group></Select.Content></Select.Root>);
};
export default AssigneeSelect;
效果如下
获取所有用户
本节代码链接
构建 API
# /app/api/users.tsximport { NextRequest, NextResponse } from "next/server";
import prisma from "@/prisma/client";export async function GET(reques: NextRequest) {const users = await prisma.user.findMany({ orderBy: { name: "asc" } });return NextResponse.json(users);
}
客户端获取数据
# /app/issues/[id]/AssigneeSelect.tsx"use client";
import { User } from "@prisma/client";
import { Select } from "@radix-ui/themes";
import axios from "axios";
import { useEffect, useState } from "react";const AssigneeSelect = () => {const [users, setUsers] = useState<User[]>([]);useEffect(() => {const getUsers = async () => {const { data } = await axios.get<User[]>("/api/users");setUsers(data);};getUsers();}, []);return (<Select.Root><Select.Trigger placeholder="Assign..." /><Select.Content><Select.Group><Select.Label>Suggestions</Select.Label>{users.map((user) => (<Select.Item value={user.id} key={user.id}>{user.name}</Select.Item>))}</Select.Group></Select.Content></Select.Root>);
};
export default AssigneeSelect;
React-Query
配置 React-Query
本节代码链接
使用如下命令安装 React-Query
npm i @tanstack/react-query
安装好后，在 /app 目录下创建 QueryClientProvider.tsx
# /app/QueryClientProvider.tsx"use client";
import {QueryClient,QueryClientProvider as ReactQueryClientProvider,
} from "@tanstack/react-query";
import { PropsWithChildren } from "react";const queryClient = new QueryClient();const QueryClientProvider = ({ children }: PropsWithChildren) => {return (<ReactQueryClientProvider client={queryClient}>{children}</ReactQueryClientProvider>);
};
export default QueryClientProvider;
然后在 layout 中将 body 内所有内容用 QueryClientProvider 包起来
# /app/layout.tsxexport default function RootLayout({children,
}: Readonly<{children: React.ReactNode;
}>) {return (<html lang="en"><body className={inter.className}><QueryClientProvider><AuthProvider><Theme appearance="light" accentColor="violet"><NavBar /><main className="p-5"><Container>{children}</Container></main></Theme></AuthProvider></QueryClientProvider></body></html>);
}
使用 React-Query
本节代码链接
首先，在 "/app/issues/[id]/Assign" 中去掉之前的 useEffect 和 useState，之后参照下面修改
# /app/issues/[id]/AssigneeSelect.tsx...
+ import { useQuery } from "@tanstack/react-query";
+ import { Skeleton } from "@/app/components";const AssigneeSelect = () => {
+ const {
+ data: users,
+ error,
+ isLoading,
+ } = useQuery<User[]>({// 用于缓存的 key，在不同地方调用 useQuery 若 key 一样则不会重复获取
+ queryKey: ["users"],// 用于获取数据的函数
+ queryFn: () => axios.get<User[]>("/api/users").then((res) => res.data),// 数据缓存多久
+ staleTime: 60 * 1000,// 最多重复获取几次
+ retry: 3,
+ });
+ if (error) return null;
+ if (isLoading) return <Skeleton />;...};export default AssigneeSelect;
完整代码(非 git diff 版)
# /app/issues/[id]/AssigneeSelect.tsx"use client";
import { User } from "@prisma/client";
import { Select } from "@radix-ui/themes";
import { useQuery } from "@tanstack/react-query";
import axios from "axios";
import { Skeleton } from "@/app/components";const AssigneeSelect = () => {const {data: users,error,isLoading,} = useQuery<User[]>({queryKey: ["users"], // 用于缓存的 key，在不同地方调用 useQuery 若 key 一样则不会重复获取queryFn: () => axios.get<User[]>("/api/users").then((res) => res.data), // 用于获取数据的函数staleTime: 60 * 1000, // 数据缓存多久retry: 3, // 最多重复获取几次});if (error) return null;if (isLoading) return <Skeleton />;return (<Select.Root><Select.Trigger placeholder="Assign..." /><Select.Content><Select.Group><Select.Label>Suggestions</Select.Label>{users?.map((user) => (<Select.Item value={user.id} key={user.id}>{user.name}</Select.Item>))}</Select.Group></Select.Content></Select.Root>);
};
export default AssigneeSelect;Prisma Relation
本节代码链接
我们需要在 Prisma 中的 Issue model 和 User model 创建一个 Relation
# schema.prismamodel Issue {id Int @id @default(autoincrement())title String @db.VarChar(255)description String @db.Textstatus Status @default(OPEN)createdAt DateTime @default(now())updatedAt DateTime @updatedAt()
+ assignedToUserId String? @db.VarChar(255)
+ assignedToUser User? @relation(fields: [assignedToUserId], references: [id])}model User {id String @id @default(cuid())name String?email String? @uniqueemailVerified DateTime?image String?accounts Account[]sessions Session[]
+ assignedIssues Issue[]}
更新修改 Issue API
本节代码链接
首先，添加一个新的 zod schema，其中 title, description, assignedToUserId 都设置为了 optional
# validationSchema.tsimport { z } from "zod";export const issueSchema = z.object({title: z.string().min(1, "Title is required!").max(255),description: z.string().min(1, "Description is required!").max(65535),
});export const patchIssueSchema = z.object({title: z.string().min(1, "Title is required!").max(255).optional(),description: z.string().min(1, "Description is required!").optional(),assignedToUserId: z.string().min(1, "AssignedToUserId is required.").max(255).optional().nullable(),
});
然后修改 "/app/api/issues/[id]/route.tsx"
# /app/api/issues/[id]/route.tsx+ import { patchIssueSchema } from "@/app/validationSchema";...export async function PATCH(request: NextRequest,{ params }: { params: { id: string } }) {const session = await getServerSession(authOptions);if (!session) return NextResponse.json({}, { status: 401 });const body = await request.json();// 换成 patchIssueSchema
+ const validation = patchIssueSchema.safeParse(body);if (!validation.success)return NextResponse.json(validation.error.format(), { status: 400 });// 直接将 title, description, assignedToUserId 结构出来
+ const { title, description, assignedToUserId } = body;// 若 body 中有 assignedToUserId，则判断该用户是否存在
+ if (assignedToUserId) {
+ const user = await prisma.user.findUnique({
+ where: { id: assignedToUserId },
+ });
+ if (!user)
+ return NextResponse.json({ error: "Invalid user" }, { status: 400 });
+ }const issue = await prisma.issue.findUnique({where: { id: parseInt(params.id) },});if (!issue)return NextResponse.json({ error: "Invalid Issue" }, { status: 404 });const updatedIssue = await prisma.issue.update({where: { id: issue.id },
+ data: {
+ title,
+ description,
+ assignedToUserId,
+ },});return NextResponse.json(updatedIssue, { status: 200 });}
分配 Issue
本节代码链接
# /app/issues/[id]/AssigneeSelect.tsx...const AssigneeSelect = ({ issue }: { issue: Issue }) => {...return (<Select.Root// 设置初始显示值
+ defaultValue={issue.assignedToUserId || ""}// 当选择时，使用patch (不需要await)
+ onValueChange={(userId) => {
+ axios.patch("/api/issues/" + issue.id, {
+ assignedToUserId: userId === "Unassign" ? null : userId,
+ });
+ }}><Select.Trigger placeholder="Assign..." /><Select.Content><Select.Group><Select.Label>Suggestions</Select.Label>{/* 添加一个 unassign */}
+ <Select.Item value="Unassign">Unassign</Select.Item>{users?.map((user) => (<Select.Item value={user.id} key={user.id}>{user.name}</Select.Item>))}</Select.Group></Select.Content></Select.Root>);};export default AssigneeSelect;
显示 Toast
本节代码链接
使用如下命令安装
npm i react-hot-toast
我们只需要在该组件任意地方添加 <Toaster /> 组件，然后在需要报错的地方调用 toast() 函数即可
# /app/issues/[id]/AssigneeSelect.tsx+ import toast, { Toaster } from "react-hot-toast";const AssigneeSelect = ({ issue }: { issue: Issue }) => {return (<><Select.RootdefaultValue={issue.assignedToUserId || ""}onValueChange={ (userId) => {
+ axios
+ .patch("/api/issues/" + issue.id, {
+ assignedToUserId: userId === "Unassign" ? null : userId,
+ })// 调用 toast.error()即可
+ .catch(() => toast.error("Changes could not be saved!"));}}>...</Select.Root>
+ <Toaster /></>);};export default AssigneeSelect;
效果如下
CSDN 的排版/样式可能有问题，去我的博客查看原文系列吧，觉得有用的话，给我的库点个star，关注一下吧
下一篇讲数据处理