Question 282376 in Mongodb Question posted in
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Mongodb – Why am I getting this error: MissingSchemaError: Schema hasn't been registered for model "Business"

This is the error I’m getting: "MissingSchemaError: Schema hasn’t been registered for model "Business"."

I’m using AstraDB vector database. I made a function to initialize a Mongoose model:

export const initMongooseBusinessModel = async () => {
    const Business = mongoose.model(
      "Business",
      new mongoose.Schema(
        {
          business_id: String,
          $vector: {
            type: [Number],
            validate: (vector) => vector && vector.length === 1536,
          },
        },
        {
          collectionOptions: {
            vector: {
              size: 1536,
              function: "cosine",
            },
          },
        },
      ),
    );
    await Business.init();
    console.log("complete")
};

I am trying to use the model in a function of another file:

import mongoose from "mongoose"

export const addToAstraDB = async (url) => {
    try {
        const Business = mongoose.model("Business")
        const businessURL = url
        // Rest of the code goes here...

I’m getting this error:

Tags:

2

Answers


  1. 0

    That is not how you initialise mongoose models. You need to export the model from your module like so:

    Business.js

    import mongoose from "mongoose"
const businessSchema = new mongoose.Schema(
        {
          business_id: String,
          $vector: {
            type: [Number],
            validate: (vector) => vector && vector.length === 1536,
          },
        },
        {
          collectionOptions: {
            vector: {
              size: 1536,
              function: "cosine",
            },
          },
        },
    );
const Business = mongoose.model("Business", businessSchema);
export default Business;

    OtherFile.js

    import mongoose from "mongoose"
import Business from "./Business.js"
export const addToAstraDB = async (url) => {
    try { 
       const doc = await Business.find(); //< Use the model that you imported
    }
    //...
};
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  2. 0

    Val Karpov (the creator of Mongoose) recently posted a writeup on building a RAG app using Mongoose and Astra DB for Vector Search. In fact, looking at the Git repo behind Val’s article, suggests that you could create a file called Business.js that looks like this:

    'use strict';

const mongoose = require('../mongoose');

const businessSchema = new mongoose.Schema({
    business_id: String,
    $vector: [Number]
});

module.exports = mongoose.model('Business', businessSchema);

    And then pull it in from your other file instead, like this:

    import mongoose from "mongoose"

export const addToAstraDB = async (url) => {
    try {
        const Business = require('./Business.js');
        const businessURL = url;
        // Rest of the code goes here...

    Although, in the article itself, it looks like he recommends just doing this in the second (other) file:

    const businessSchema = new mongoose.Schema({
    business_id: String,
    $vector: [Number]
});
const Business = mongoose.model('Business', businessSchema);

    Give Val’s article and repo a read through, and that should point you in the right direction.

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