[ADDED] Added CURD to paper

Author: swathiharish-gh

models/paper.js

@@ -10,3 +10,39 @@ const paperSchema = {
 
 // eslint-disable-next-line  no-unused-vars
 const Paper = connector.model("Paper", paperSchema);
+
+// CRUD OPERATIONS
+
+async function remove(filter) {
+  const deleteResult = await Paper.deleteMany(filter);
+  return deleteResult.acknowledged;
+}
+
+async function create(paperData) {
+  const {
+    answerSheetID, exam, student, checkedBy, mark,
+  } = paperData;
+  const paper = new Paper({
+    answerSheetID,
+    exam,
+    student,
+    checkedBy,
+    mark,
+  });
+  const paperDoc = await paper.save();
+  return paperDoc;
+}
+
+async function read(filter, limit = 1) {
+  const paperDoc = await Paper.find(filter).limit(limit);
+  return paperDoc;
+}
+
+async function update(filter, updateObject, options = { multi: true }) {
+  const updateResult = await Paper.updateMany(filter, { $set: updateObject }, options);
+  return updateResult.acknowledged;
+}
+
+export default {
+  create, read, update, remove,
+};