added curd operations to topic model

models/topic.js

@@ -5,3 +5,33 @@ const topicSchema = {
 };
 // eslint-disable-next-line  no-unused-vars
 const Topic = connector.model("topic", topicSchema);
+
+//CURD operations
+async function create(topicData) {
+  const{
+    title
+  }=topicData;
+  const topic = new Topic({
+    title,
+  });
+  const topicDoc = await topic.save();
+  return topicDoc;
+}
+
+async function read(filter, limit = 1) {
+  const topicDoc = await Topic.find(filter).limit(limit);
+  return topicDoc;
+}
+
+async function update(filter, updateObject, options = { multi: true }) {
+  const updateResult = await Topic.updateMany(filter, { $set: updateObject }, options);
+  return updateResult.acknowledged;
+}
+
+async function remove(filter) {
+  const deleteResult = await Topic.deleteMany(filter);
+  return deleteResult.acknowledged;
+}
+export default {
+  create, remove, update, read,
+};