diff --git a/server/models/coordinator.js b/server/models/coordinator.js
index ced548c..666ed3b 100644
--- a/server/models/coordinator.js
+++ b/server/models/coordinator.js
@@ -6,10 +6,7 @@ const coordinatorSchema = new Schema({
   contact: Number,
   email: String,
   designation: String,
-  prefect: {
-    type: Schema.Types.ObjectId,
-    ref: 'prefect',
-  },
+  prefect: String
 });
 
 module.exports = mongoose.model('coordinator', coordinatorSchema);
diff --git a/server/models/importantDocument.js b/server/models/importantDocument.js
new file mode 100644
index 0000000..30001a0
--- /dev/null
+++ b/server/models/importantDocument.js
@@ -0,0 +1,8 @@
+const mongoose = require('mongoose');
+const Schema = mongoose.Schema;
+const importantDocumentsSchema = new Schema({
+  title: String,
+  link: String,
+});
+
+module.exports = mongoose.model('importantdoc', importantDocumentsSchema);
diff --git a/server/schema/queries.js b/server/schema/queries.js
index 2a79108..8e71c7a 100644
--- a/server/schema/queries.js
+++ b/server/schema/queries.js
@@ -7,11 +7,14 @@ const Mentor = require('../models/mentor');
 const Mentee = require('../models/mentee');
 const Coordinator = require('../models/coordinator');
 const Prefect = require('../models/prefect');
+const ImportantDocument = require('../models/importantDocument');
+
 const {
   CoordinatorType,
   PrefectType,
   MentorType,
   MenteeType,
+  ImportantDocumentType,
 } = require('./types');
 
 const query = new GraphQLObjectType({
@@ -45,6 +48,13 @@ const query = new GraphQLObjectType({
         return Coordinator.find({});
       },
     },
+    ImportantDocuments: {
+      type: new GraphQLList(ImportantDocumentType),
+      args: {},
+      resolve(parents, args){
+        return ImportantDocument.find({});
+      }
+    }
   },
 });
 
diff --git a/server/schema/types.js b/server/schema/types.js
index c5c317f..3b6bd13 100644
--- a/server/schema/types.js
+++ b/server/schema/types.js
@@ -17,15 +17,15 @@ const CoordinatorType = new GraphQLObjectType({
   fields: () => ({
     id: { type: GraphQLID },
     name: { type: GraphQLString },
-    contact: { type: GraphQLInt },
+    contact: { type: GraphQLString },
     rollNumber: { type: GraphQLString },
     email: { type: GraphQLString },
     designation: { type: GraphQLString },
-    prefect: { type: GraphQLID },
+    prefect: { type: GraphQLString },
     prefectDetails: {
       type: PrefectType,
       resolve(parent, args) {
-        return Prefect.findById(parent.prefect);
+        return Prefect.findOne({ rollNumber: parent.prefect });
       },
     },
   }),
@@ -36,14 +36,14 @@ const PrefectType = new GraphQLObjectType({
   fields: () => ({
     id: { type: GraphQLID },
     name: { type: GraphQLString },
-    contact: { type: GraphQLInt },
+    contact: { type: GraphQLString },
     email: { type: GraphQLString },
     rollNumber: { type: GraphQLString },
-    coordinator: { type: GraphQLID },
+    coordinator: { type: GraphQLString },
     coordinatorDetails: {
       type: CoordinatorType,
       resolve(parent, args) {
-        return Coordinator.findById(parent.coordinator);
+        return Coordinator.findOne({ rollNumber: parent.coordinator });
       },
     },
   }),
@@ -55,19 +55,19 @@ const MentorType = new GraphQLObjectType({
     id: { type: GraphQLID },
     name: { type: GraphQLString },
     rollNumber: { type: GraphQLString },
-    contact: { type: GraphQLInt },
+    contact: { type: GraphQLString },
     email: { type: GraphQLString },
-    prefect: { type: GraphQLID },
+    prefect: { type: GraphQLString },
     prefectDetails: {
       type: PrefectType,
       resolve(parent, args) {
-        return Prefect.findById(parent.prefect);
+        return Prefect.findOne({ rollNumber: parent.prefect });
       },
     },
     mentees: {
       type: new GraphQLList(MenteeType),
       resolve(parent, args) {
-        return Mentee.find({ mentor: parent.id });
+        return Mentee.find({ mentor: parent.rollNumber });
       },
     },
   }),
@@ -79,20 +79,30 @@ const MenteeType = new GraphQLObjectType({
     id: { type: GraphQLID },
     name: { type: GraphQLString },
     rollNumber: { type: GraphQLString },
-    contact: { type: GraphQLInt },
+    contact: { type: GraphQLString },
     email: { type: GraphQLString },
     mentor: {
       type: MentorType,
       resolve(parent, args) {
-        return Mentor.findById(parent.mentor);
+        return Mentor.findOne({ rollNumber: parent.mentor });
       },
     },
   }),
 });
 
+const ImportantDocumentType = new GraphQLObjectType({
+  name: 'ImportantDocuments',
+  fields: () => ({
+    id: {type: GraphQLID},
+    title: {type: GraphQLString},
+    link: {type: GraphQLString},
+  })
+})
+
 module.exports = {
   CoordinatorType,
   PrefectType,
   MentorType,
   MenteeType,
+  ImportantDocumentType,
 };