2 files changed, 8 insertions, 3 deletions
diff --git a/models/votes/vote.model.ts b/models/votes/vote.model.ts
index 1dbb146..df2307e 100644
--- a/models/votes/vote.model.ts
+++ b/models/votes/vote.model.ts
@@ -1,5 +1,7 @@
 import { Model, model } from 'mongoose';
 import { VoteSchema, voteSchema } from './vote.schema';
 
+voteSchema.index({ pollId: 1, userId: 1 }, { unique: true }); // Unique together
+
 export default model<VoteSchema, Model<VoteSchema>>('Vote', voteSchema);
 
diff --git a/models/votes/vote.schema.ts b/models/votes/vote.schema.ts
index 709e8bf..63ba212 100644
--- a/models/votes/vote.schema.ts
+++ b/models/votes/vote.schema.ts
@@ -8,15 +8,18 @@ export interface VoteSchema extends Document, Omit<Vote, '_id'> {
 export const voteSchema = new Schema({
   userId: {
     type: Types.ObjectId,
-    ref: 'user'
+    ref: 'user',
+    required: true
   },
   pollId: {
     type: Types.ObjectId,
-    ref: 'poll'
+    ref: 'poll',
+    required: true
   },
   which: {
     type: String,
-    enum: ['left', 'right']
+    enum: ['left', 'right'],
+    required: true
   }
 }, { timestamps: true });