以前项目基本上全部使用MysqL数据库, 最近项目排期空出了一点时间leader决定把日志模块迁移到插入/查询性能更好的MongoDB上. 多条件查询的写法着实费了些功夫, 撰文记录一下.
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一、准备工作
1. 安装过程, 不赘述了
2. 添加ReferencePackage
dotnet add package mongodb.bson dotnet add package mongodb.driver
3. appsetting.json添加连接配置
MongodbHost: { Connection: mongodb://[username]:[password]@[ip]:[port], DataBase: [database], Table: },
public static MongodbHostOptions MongodbConfig() { var builder = new ConfigurationBuilder() .SetBasePath(Directory.GetCurrentDirectory()) .AddJsonFile(appsettings.json); IConfiguration Configuration = builder.Build(); var option = Configuration.GetSection(MongodbHost); return new MongodbHostOptions { Connection = option[Connection], DataBase = option[DataBase], Table = option[Table] }; }
这里的查询方法是网上找的, 直接拿来用了. 如果是单一数据源的话, 这里的host可以提取出来成为helper类的属性.
#region FindListByPage 分页查询集合 /// <summary> /// 分页查询集合 /// </summary> /// <param name=filter>查询条件</param> /// <param name=pageIndex>当前页</param> /// <param name=pageSize>页容量</param> /// <param name=count>总条数</param> /// <param name=field>要查询的字段,不写时查询全部</param> /// <param name=sort>要排序的字段</param> /// <returns></returns> public static List<T> FindListByPage(FilterDeFinition<T> filter, int pageIndex, int pageSize, out int count, string[] field = null, SortDeFinition<T> sort = null) { try { MongodbHostOptions host = Tools.AppSettingsTools.MongodbConfig(); host.Table = WSMessageLog; var client = MongodbClient<T>.MongodbInfoClient(host); count = Convert.ToInt32(client.CountDocuments(filter)); //不指定查询字段 if (field == null || field.Length == 0) { if (sort == null) return client.Find(filter).Skip((pageIndex - 1) * pageSize).Limit(pageSize).ToList(); //进行排序 return client.Find(filter).sort(sort).Skip((pageIndex - 1) * pageSize).Limit(pageSize).ToList(); } //指定查询字段 var fieldList = new List<ProjectionDeFinition<T>>(); for (int i = 0; i < field.Length; i++) { fieldList.Add(Builders<T>.Projection.Include(field[i].ToString())); } var projection = Builders<T>.Projection.Combine(fieldList); fieldList?.Clear(); //不排序 if (sort == null) return client.Find(filter).Project<T>(projection).Skip((pageIndex - 1) * pageSize).Limit(pageSize).ToList(); //排序查询 return client.Find(filter).sort(sort).Project<T>(projection).Skip((pageIndex - 1) * pageSize).Limit(pageSize).ToList(); } catch (Exception ex) { throw ex; } } #endregion
这里还踩了一个坑. MongoDB里存储的时间是格林尼治时间, 插入8:00, 查询时会发现变成了0:00,所以定义时间属性的时候需要加个标签
[BsonDateTimeOptions(Kind = DateTimeKind.Local)] public DateTime logtime { get; set; }
这里的OprLogModel是定义了查询条件的类.
public static LogPager<log_operate> Get_operate_log_mongo(OprLogModel qModel) { LogPager<log_operate> pager = new LogPager<log_operate>(); FilterDeFinition<log_operate> filters; var sortbuilder = Builders<log_operate>.sort; var sort = sortbuilder.Descending(operate_time); #region 用户权限过滤 IEnumerable<string> IdList = dev_deviceRepository.GetBinding(qModel.user_id); filters = Builders<log_operate>.Filter.In(device_id, IdList); #endregion if (!string.IsNullOrEmpty(qModel.device_id)) { var filters_did = Builders<log_operate>.Filter.Eq(device_id, qModel.device_id); filters = Builders<log_operate>.Filter.And(filters, filters_did); } if (qModel.sDate != null) { var filters_sdate = Builders<log_operate>.Filter.Gte<DateTime>(operate_time, Convert.ToDateTime(qModel.sDate)); filters = Builders<log_operate>.Filter.And(filters, filters_sdate); } if (qModel.eDate != null) { var filters_edate = Builders<log_operate>.Filter.Lte<DateTime>(operate_time, Convert.ToDateTime(qModel.eDate)); filters = Builders<log_operate>.Filter.And(filters, filters_edate); } int total; pager.data = MongoTools<log_operate>.FindListByPage(filters, qModel.pageindex, (qModel.pageindex - 1) * qModel.pagesize, out total, null, sort); pager.total = total; return pager; } #endregion
也可以先定义一个空的filterdeFinition, 然后与各查询条件通过And聚合:
FilterDeFinition<log_operate> filters = FilterDeFinition<log_operate>.Empty; var filters_idlist = Builders<log_operate>.Filter.In(device_id, IdList); filters = Builders<log_operate>.Filter.And(filters, filters_idlist);