uniCloud 基础示例(增、删、改、查)
准备工作:
1.在uniCloud目录右键创建并关联服务空间
2.在uniCloud/database目录内db_init.json上右键初始化云数据库
3.在uniCloud/cloudfunctions目录右键选择“上传所有云函数”
开始愉快的体验uniCloud吧!
1.新增一条数据
页面:
<button type="primary" @click="add">新增一条数据</button>
add函数:
async add() { uni.showLoading({ title: '处理中...' }) return await uniCloud.callFunction({ name: 'add', data: { name: 'DCloud', subType: 'uniCloud', createTime: Date.now() } }).then((res) => { uni.hideLoading() uni.showModal({ content: `成功添加一条数据,文档id为:${res.result.id}`, showCancel: false }) console.log(res) return res.result.id }).catch((err) => { uni.hideLoading() uni.showModal({ content: `添加数据失败,错误信息为:${err.message}`, showCancel: false }) console.error(err) }) }
云函数页面(uniCloud/uniCloud-aliyun/cloudfunctions/add/index.js)
'use strict'; const db = uniCloud.database() exports.main = async (event, context) => { const collection = db.collection('unicloud-test') const res = await collection.add(event) return res };
2.删除一条数据
页面:
<button type="primary" @click="remove">删除一条数据</button>
remove函数
async remove() { uni.showLoading({ title: '处理中...' }) return await uniCloud.callFunction({ name: 'remove' }).then((res) => { uni.hideLoading() uni.showModal({ content: res.result.msg, showCancel: false }) console.log(res) return res.result.msg }).catch((err) => { uni.hideLoading() uni.showModal({ content: `删除失败,错误信息为:${err.message}`, showCancel: false }) console.error(err) }) }
云函数(uniCloud/uniCloud-aliyun/cloudfunctions/remove/index.js)
'use strict'; const db = uniCloud.database() exports.main = async (event, context) => { const collection = db.collection('unicloud-test') const docList = await collection.limit(1).get() if (!docList.data || docList.data.length === 0) { return { status: -1, msg: '集合unicloud-test内没有数据' } } const res = await collection.doc(docList.data[0]._id).remove() if (res.deleted === 1) { return { status: 0, msg: '成功删除unicloud-test内第一条数据' } } else { return { status: -2, msg: '删除数据失败' } } };
3.修改数据
页面:
<button type="primary" @click="update">修改数据</button>
updata函数
async update() { uni.showLoading({ title: '处理中...' }) return await uniCloud.callFunction({ name: 'update', data: { name: 'DCloud', subType: 'html 5+', createTime: Date.now() } }).then((res) => { uni.hideLoading() uni.showModal({ content: res.result.msg, showCancel: false }) console.log(res) return res.result.msg }).catch((err) => { uni.hideLoading() uni.showModal({ content: `更新操作执行失败,错误信息为:${err.message}`, showCancel: false }) console.error(err) }) }
云函数(uniCloud/uniCloud-aliyun/cloudfunctions/update/index.js)
'use strict'; const db = uniCloud.database() exports.main = async (event, context) => { const collection = db.collection('unicloud-test') const docList = await collection.limit(1).get(); if (!docList.data || docList.data.length === 0) { return { status: -1, msg: '集合unicloud-test内没有数据' } } const res = await collection.doc(docList.data[0]._id).update(event); if (res.updated === 1) { let result = Object.assign({}, { _id: docList.data[0]._id }, event) return { status: 0, msg: `集合第一条数据由${JSON.stringify(docList.data[0])}修改为${JSON.stringify(result)}` } } else { return { status: -1, msg: `集合unicloud-test内没有数据` } } };
4.查询前10条数据
页面:
<button type="primary" @click="get">查询前10条数据</button>
get函数
async get() { uni.showLoading({ title: '处理中...' }) return await uniCloud.callFunction({ name: 'get' }).then((res) => { uni.hideLoading() uni.showModal({ content: `查询成功,获取数据列表为:${JSON.stringify(res.result.data)}`, showCancel: false }) console.log(res) return res.result.data }).catch((err) => { uni.hideLoading() uni.showModal({ content: `查询失败,错误信息为:${err.message}`, showCancel: false }) console.error(err) }) }
云函数(uniCloud/uniCloud-aliyun/cloudfunctions/get/index.js)
'use strict'; const db = uniCloud.database() exports.main = async (event, context) => { const collection = db.collection('unicloud-test') const res = await collection.limit(10).get() return res };