init

models/TodoList.js

@@ -0,0 +1,14 @@
+const mongoose = require('mongoose');
+
+const { Schema } = mongoose;
+
+const todoListSchema = Schema({
+  _id: Schema.Types.ObjectId,
+  name: {
+    type: String,
+    required: true,
+  },
+  todos: [{ type: Schema.Types.ObjectId, ref: 'Todo' }],
+});
+
+mongoose.model('TodoList', todoListSchema);