Added Many-Many Relation to Problems and Contests

controls/admin.js

@@ -11,20 +11,9 @@ var moment = require("moment");
  */
 helper.displayAllProblems = async (req, res, next) => {
     /**Finding all the problems sorted in descending order of the qID */
-    Question.find({}).sort({ qID: -1 })
-        .then(async (data) => {
-            var contestsData= await contests.find({});
-            console.log(contestsData);
-            for(var i = 0; i < data.length; i++) {
-
-                var contestsList = [];
-                for(var j = 0; j <contestsData.length; j++) {
-                    if (contestsData[j].problemsID.includes(String(data[i].qID)))
-                        contestsList.push(contestsData[j].code);
-                }
-                data[i].contests = contestsList;
-            }
-
+
+    Question.find({}).populate('contests','code').sort({ qID: -1 })
+        .then( (data) => {  
             res.render("admin", { data: data });
         })
         .catch((err) => {
@@ -148,7 +137,7 @@ helper.createContest = async (req, res, next) => {
         problemsID: req.body.problemsID.split(",").map(qID => qID.trim())
     };
     newContest.endDate = moment(newContest.date).add(newContest.duration,'m').toDate();
-    console.log(newContest)
+    console.log(newContest);
     var flag_contest = 0;
     await contests.findOne({"code": newContest.code})
         .then((data) => {
@@ -160,8 +149,27 @@ helper.createContest = async (req, res, next) => {
 
     if(flag_contest == 0){
         await contests.create(newContest)
-        .then((val) => {
+        .then(async (val) => {
+
             console.log(val);
+
+            for(var i = 0; i < val.problemsID.length; i++) {
+
+                const refProb= await Question.findOne({qID:Number(val.problemsID[i])});
+                console.log(refProb);
+                if (!refProb) {
+                    console.log(`No problem found with ID ${val.problemsID[i]}`);
+                }
+                else {
+
+                    val.problems.push(refProb);
+                    refProb.contests.push(val);
+                    await refProb.save();
+                }
+
+            }
+            await val.save();     
+
         })
         .catch((err) => {
             console.log(err);

models/contests.js

@@ -1,13 +1,14 @@
 var mongoose = require('mongoose');
 
 var contests = new mongoose.Schema({
-    code: String,
-    name: String,
-    date: Date,
-    endDate: Date,
-    duration: Number,
-    visible: Boolean,
-    problemsID: [String]
+  code: String,
+  name: String,
+  date: Date,
+  endDate: Date,
+  duration: Number,
+  visible: Boolean,
+  problemsID: [String],
+  problems:[{type: mongoose.Schema.ObjectId, ref: "Problems"}]
 });
 
 var Contests = mongoose.model('Contests', contests);

models/problems.js

@@ -18,6 +18,7 @@ var prob = new mongoose.Schema({
     memoryLimit: Number,
     tags: [String],
     editorial: String,
+    contests:[{type: mongoose.Schema.ObjectId, ref: "Contests"}]
 });
 var Problems = mongoose.model('Problems', prob);
 module.exports = Problems;

views/admin.ejs

@@ -58,8 +58,8 @@
                             <% } %>
 
                             <% for(var j = 0; j < data[i].contests.length; j++) { %>
-                                <a href="/contests/<%= data[i].contests[j]%>">
-                                     <%= data[i].contests[j] %>,  
+                                <a href="/contests/<%= data[i].contests[j].code%>">
+                                     <%= data[i].contests[j].code %>,  
                                 </a>
                             <% } %>
                         </td>