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uni-im示例/uni_modules/uni-im/uniCloud/database/uni-im-group.schema.ext.js

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+// schema扩展相关文档请参阅：https://uniapp.dcloud.net.cn/uniCloud/jql-schema-ext.html
+const db = uniCloud.database();
+
+module.exports = {
+	trigger: {
+		async afterCreate({
+			addDataList,
+			clientInfo,
+			result
+		}){
+			if(addDataList.length>1){
+				throw('禁止批量创建')
+			}
+			// console.log(result);
+			let res = await db.collection('uni-im-group').doc(result.id).get()
+			let data = res.data[0]
+			// console.log(data)
+			
+			const dbJQL = uniCloud.databaseForJQL({
+				clientInfo,
+			})
+
+			// 添加操作权限
+			dbJQL.setUser({
+				uid: data.user_id, // 建议此处使用真实uid
+				role: ['admin'], // 指定当前执行用户的角色为admin。如果只希望指定为admin身份，可以删除uid和permission节点
+				permission: []
+			})
+
+			res = await dbJQL.collection('uni-im-group-member').add({
+				"group_id":data._id,
+				"user_id":data.user_id,
+				"role":['creator','admin']
+			})
+			// console.log({res});
+		},
+		async beforeCreate({addDataList}){
+		},
+		async beforeDelete({where,userInfo,triggerContext}){
+			if(!triggerContext){
+				throw new Error('执行删除群失败！你的HBuilderX版本过低，请使用3.6.16及以上版本')
+			}
+			
+			let {data:[groupInfo]} = await db.collection('uni-im-group').doc(where._id).get()
+			triggerContext.groupInfo = groupInfo
+			console.log('beforeDelete',where);
+			let {data:[has]} = await db.collection('uni-im-conversation')
+										.where({
+											group_id:where._id,
+											user_id:userInfo._id
+										})
+										.get()
+			if(!has){
+				throw new Error('限群创建者操作')
+			}
+		},
+		async afterDelete({where,clientInfo,triggerContext}){
+			console.log('beforeDelete',where,triggerContext);
+			const group_id = where._id
+			// 删除相关会话
+			let res = await db.collection('uni-im-conversation').where({group_id}).remove()
+			// 删除相关加群申请数据
+			res = await db.collection('uni-im-group-join').where({group_id}).remove()
+			
+			// 通知所有群成员，注意：需要群成员列表清空之前发 要不然就收不到了
+			let title = "群聊被解散通知",
+				content = `群聊"${triggerContext.groupInfo.name}"已被解散`,
+				pushParam = {
+					payload: {
+						"type": "uni-im-notification",
+						"subType": "uni-im-group-cancellation",
+						"data": {
+							group_id
+						},
+						unique:group_id
+					},
+					title, // "收到im消息，离线时显示的标题",
+					content //"离线时显示的内容"
+				}
+			const uniImCo = uniCloud.importObject("uni-im-co")
+			res = await uniImCo.sendMsgToGroup({pushParam,appId:clientInfo.appId})
+			// console.log(res);
+			
+			// 删除相关群成员数据（注意：要先发群通知再解散，要不然消息发布出去“无法指定接收消息的人”）
+			res = await db.collection('uni-im-group-member').where({group_id}).remove()
+			console.log('beforeDelete',res);
+		}
+	}
+}