Mongodb C#客戶端數據關聯數據，使用Linq語法進行關聯

在Mongodb C# drivers 文檔

官方地址：https://docs.mongodb.com/ecosystem/drivers/csharp/

基礎的使用請參考《c# Mongodb》

 

本來在Nodejs中是能夠直接某個字段參考自另外一個表的，數據類型是ObjectID，只須要加入ref:'某個實體'便可實現

'use strict';
import mongoose from './db';

let Schema = mongoose.Schema;

let jobOrderSchema = new Schema({
    JobOrderCode: {
        type: String,
        unique: true,
        trim: true,
        required: [true, 'Kindly enter the jobOrder code']
    },
    JobOrderName: {
        type: String,
        trim: true,
        required: [true, 'Kindly enter the jobOrder name']
    },
    JobOrderDesc: {
        type: String,
        trim: true,
        required: [true, 'Kindly enter the jobOrder description']
    },
    OrderCount: {
        type: Number,
        required: [true, 'Kindly enter the order count']
    },
 CustomerID: { type: Schema.Types.ObjectId, ref: 'Customer' }, MaterialID: { type: Schema.Types.ObjectId, ref: 'Material' }, MouldID: { type: Schema.Types.ObjectId, ref: 'Mould' }, MachineID:{ type: Schema.Types.ObjectId, ref: 'Machine' },
    MachineAcceptLog:[{
        type: String,
        trim: true
    }],
    Remark: {
        type: String,
        trim: true
    },
    CreateAt: {
        type: Date,
        default: Date.now
    },
    CreateBy: {
        type: String
    },
    LastUpdateAt: {
        type: Date,
        default: Date.now
    },
    LastUpdateBy: {
        type: String
    },
});

jobOrderSchema.set('collection', 'JobOrder');
const jobOrderModel = mongoose.model('JobOrder', jobOrderSchema);

export default jobOrderModel;

 

 

但在C#中，暫時尚未找到ref類型的處理方式，

找到部分資料，但尚未悟透方法 

參考地址：https://csharp.hotexamples.com/examples/MongoDB.Driver/MongoDBRef/-/php-mongodbref-class-examples.html

參考地址：https://oz-code.com/blog/how-to-mongodb-in-c-part-1/ 

 

使用Linq語法參考https://jira.mongodb.org/browse/CSHARP-1627 

在沒有找到相關的方法時，先使用如下代碼代替，即便用Linq的語法進行處理

        /// <summary>
        /// 獲取全部未開始的訂單
        /// </summary>
        /// <returns></returns>
        public static object GetJobOrderByNoStart()
        {
            try
            {
                var customerCollection = Common.MongodbHandler.GetInstance().mc_MongoDatabase.GetCollection<DataModel.Customer>(Common.ConfigFileHandler.GetAppConfig("CustomerCollectionName"));
                var materialCollection = Common.MongodbHandler.GetInstance().mc_MongoDatabase.GetCollection<DataModel.Material>(Common.ConfigFileHandler.GetAppConfig("MaterialCollectionName"));
                var mouldCollection = Common.MongodbHandler.GetInstance().mc_MongoDatabase.GetCollection<DataModel.Mould>(Common.ConfigFileHandler.GetAppConfig("MouldCollectionName"));
                var jobOrderCollection = Common.MongodbHandler.GetInstance().mc_MongoDatabase.GetCollection<DataModel.JobOrder>(Common.ConfigFileHandler.GetAppConfig("JobOrderCollectionName"));

                var getdocument = (from jo in jobOrderCollection.AsQueryable() join cu in customerCollection.AsQueryable() on jo.CustomerID equals cu._id join ma in materialCollection.AsQueryable() on jo.MaterialID equals ma._id join mo in mouldCollection.AsQueryable() on jo.MouldID equals mo._id where jo.Status == null
                                   select new
                                   {
                                       JobOrderCode = jo.JobOrderCode,
                                       JobOrderName = jo.JobOrderName,
                                       OrderCount = jo.OrderCount,
                                       JobOrderDesc = jo.JobOrderDesc,
                                       Status =
                                       (
                                            jo.Status == null ? "未開始" :
                                            jo.Status == "Process" ? "生產中" :
                                            jo.Status == "Stop" ? "暫停" : "未知狀態"
                                        ),

                                       CustomerCode = cu.CustomerCode,
                                       CustomerName = cu.CustomerName,

                                       MaterialCode = ma.MaterialCode,
                                       MaterialName = ma.MaterialName,
                                       MaterialSpecification = ma.MaterialSpecification,
                                       
                                       MouldCode = mo.MouldCode,
                                       MouldName = mo.MouldName,
                                       MouldSpecification = mo.MouldSpecification,
                                   }
                                ).ToList();


                return getdocument;
            }
            catch (Exception ex)
            {
                throw ex;
            }

        }