Nuxt•2w ago

Mongoose 'Cannot overwrite `PhotoRequest` model once compiled.'

I have this Mongoose model:

import mongoose, { type ObjectId } from "mongoose";

interface IPhotoRequest {
    locationId: ObjectId,
    photo: string,
}

const schema = new mongoose.Schema<IPhotoRequest>({
    locationId: {
        type: mongoose.Schema.Types.ObjectId,
        ref: 'Location',
        required: true
    },
    photo: {
        type: String,
        required: true
    },

});

const PhotoRequest = mongoose.model<IPhotoRequest>('PhotoRequest', schema, 'photorequests');
export default PhotoRequest;

import mongoose, { type ObjectId } from "mongoose";

interface IPhotoRequest {
    locationId: ObjectId,
    photo: string,
}

const schema = new mongoose.Schema<IPhotoRequest>({
    locationId: {
        type: mongoose.Schema.Types.ObjectId,
        ref: 'Location',
        required: true
    },
    photo: {
        type: String,
        required: true
    },

});

const PhotoRequest = mongoose.model<IPhotoRequest>('PhotoRequest', schema, 'photorequests');
export default PhotoRequest;

Which I import on my server like this:

import PhotoRequest from "~/models/photo_request";

import PhotoRequest from "~/models/photo_request";

And in my front-end:

<script lang="ts" setup>
import PhotoRequest from '~/models/photo_request'

const props = defineProps<{ request: typeof PhotoRequest}>()
const emit = defineEmits<{

}>()

</script>

<script lang="ts" setup>
import PhotoRequest from '~/models/photo_request'

const props = defineProps<{ request: typeof PhotoRequest}>()
const emit = defineEmits<{

}>()

</script>

Yet I still get this error: 'Cannot overwrite PhotoRequest model once compiled.' How can this be?

5 Replies

kapa.ai•2w ago

Hi @Kyllian. I'm kapa.ai, your friendly support bot. I will try to answer your question by searching through the knowledge base. :wave: ---------------------- The error "Cannot overwrite PhotoRequest model once compiled" is occurring because you're importing the Mongoose model in both your server-side and client-side code, which causes the model to be registered multiple times. In Nuxt, there's a clear separation between server and client code. Mongoose models should only be used on the server side, not in your Vue components. The Problem Based on the knowledge sources, when using Mongoose with Nuxt, you should: 1. Define your schemas in the server directory 2. Access them only through server-side code or API routes 3. Never import server models directly in client components Solution Here's how to fix your issue: 1. Move your Mongoose model to the server directory:

// server/models/photo_request.js or .ts
import mongoose, { type ObjectId } from "mongoose";

interface IPhotoRequest {
    locationId: ObjectId,
    photo: string,
}

const schema = new mongoose.Schema<IPhotoRequest>({
    locationId: {
        type: mongoose.Schema.Types.ObjectId,
        ref: 'Location',
        required: true
    },
    photo: {
        type: String,
        required: true
    },
});

export const PhotoRequest = mongoose.model<IPhotoRequest>('PhotoRequest', schema, 'photorequests');

// server/models/photo_request.js or .ts
import mongoose, { type ObjectId } from "mongoose";

interface IPhotoRequest {
    locationId: ObjectId,
    photo: string,
}

const schema = new mongoose.Schema<IPhotoRequest>({
    locationId: {
        type: mongoose.Schema.Types.ObjectId,
        ref: 'Location',
        required: true
    },
    photo: {
        type: String,
        required: true
    },
});

export const PhotoRequest = mongoose.model<IPhotoRequest>('PhotoRequest', schema, 'photorequests');

2. Create an API endpoint to interact with your model:

// server/api/photo-requests/[id].get.js
export default defineEventHandler(async (event) => {
  try {
    const id = event.context.params.id
    const photoRequest = await PhotoRequest.findById(id)
    return photoRequest
  } catch (error) {
    console.log(error)
    return createError({ statusCode: 500, statusMessage: 'Something went wrong.' })
  }
})

// server/api/photo-requests/[id].get.js
export default defineEventHandler(async (event) => {
  try {
    const id = event.context.params.id
    const photoRequest = await PhotoRequest.findById(id)
    return photoRequest
  } catch (error) {
    console.log(error)
    return createError({ statusCode: 500, statusMessage: 'Something went wrong.' })
  }
})

3. Update your component to fetch data through the API instead of importing the model directly:

<script lang="ts" setup>
// Define an interface for your photo request data
interface IPhotoRequest {
  _id: string
  locationId: string
  photo: string
}

const props = defineProps<{ requestId: string }>()
const request = ref<IPhotoRequest | null>(null)

// Fetch the data from your API
onMounted(async () => {
  try {
    request.value = await $fetch(`/api/photo-requests/${props.requestId}`)
  } catch (error) {
    console.error(error)
  }
})
</script>

<script lang="ts" setup>
// Define an interface for your photo request data
interface IPhotoRequest {
  _id: string
  locationId: string
  photo: string
}

const props = defineProps<{ requestId: string }>()
const request = ref<IPhotoRequest | null>(null)

// Fetch the data from your API
onMounted(async () => {
  try {
    request.value = await $fetch(`/api/photo-requests/${props.requestId}`)
  } catch (error) {
    console.error(error)
  }
})
</script>

This approach follows the pattern shown in the Stack Overflow answer about nuxt-mongoose, where server models are only accessed through API routes, not directly imported in client components. Remember that in Nuxt, files in the server directory are only accessible within the server context, except for API routes which can be called from the client side. ---------------------- Note: you can ask me a follow up question by @ mentioning me again :speech_balloon: ----------------------

kapa.ai•2w ago

<@166602211780984832> Kapa.ai is still learning and improving, please let me know how I did by reacting below.

KyllianOP•2w ago

@kapa.ai so i have to write my interfaces 3 times?

kapa.ai•2w ago

Let me check the knowledge base for you again. One moment! :books: ---------------------- I understand your frustration about potentially having to define interfaces multiple times. You don't necessarily need to write your interfaces three times. Here are some approaches to avoid duplication: Option 1: Create a shared types file You can create a types file that can be imported by both server and client code:

// types/photo-request.ts
import type { ObjectId } from 'mongoose'

export interface IPhotoRequest {
  _id?: string | ObjectId
  locationId: string | ObjectId
  photo: string
}

// types/photo-request.ts
import type { ObjectId } from 'mongoose'

export interface IPhotoRequest {
  _id?: string | ObjectId
  locationId: string | ObjectId
  photo: string
}

Then import this interface where needed:

// server/models/photo_request.ts
import mongoose from 'mongoose'
import type { IPhotoRequest } from '~/types/photo-request'

const schema = new mongoose.Schema<IPhotoRequest>({
  // schema definition
})

// server/models/photo_request.ts
import mongoose from 'mongoose'
import type { IPhotoRequest } from '~/types/photo-request'

const schema = new mongoose.Schema<IPhotoRequest>({
  // schema definition
})

// client component
import type { IPhotoRequest } from '~/types/photo-request'

const props = defineProps<{ request: IPhotoRequest }>()

// client component
import type { IPhotoRequest } from '~/types/photo-request'

const props = defineProps<{ request: IPhotoRequest }>()

Option 2: Use auto-type recognition Nuxt can automatically recognize type definitions in your project without explicit imports if you add them to the global namespace:

// ~/types/models.d.ts
declare global {
  interface IPhotoRequest {
    _id?: string
    locationId: string
    photo: string
  }
}

// Tell TypeScript this file is a module
export {}

// ~/types/models.d.ts
declare global {
  interface IPhotoRequest {
    _id?: string
    locationId: string
    photo: string
  }
}

// Tell TypeScript this file is a module
export {}

This approach is mentioned in a Stack Overflow post about type definitions in Nuxt. Option 3: Use the nuxt-mongoose module If you're using the nuxt-mongoose module, it provides a defineMongooseModel helper that can simplify your model definitions and make the types available throughout your application:

// server/models/photo_request.schema.ts
import { defineMongooseModel } from "#nuxt/mongoose"
export const PhotoRequest = defineMongooseModel({
  name: 'PhotoRequest',
  schema: {
    locationId: {
      type: 'ObjectId',
      ref: 'Location',
      required: true
    },
    photo: {
      type: 'string',
      required: true
    }
  }
})

// server/models/photo_request.schema.ts
import { defineMongooseModel } from "#nuxt/mongoose"
export const PhotoRequest = defineMongooseModel({
  name: 'PhotoRequest',
  schema: {
    locationId: {
      type: 'ObjectId',
      ref: 'Location',
      required: true
    },
    photo: {
      type: 'string',
      required: true
    }
  }
})

Remember that regardless of which approach you choose, you should still follow the pattern of only using Mongoose models on the server side and accessing them through API endpoints from the client side. The key is to maintain the separation between client and server code while reusing type definitions to avoid duplication. I hope this helps clarify how to manage your interfaces efficiently in a Nuxt application! ---------------------- Note: you can ask me a follow up question by @ mentioning me again :speech_balloon: ----------------------

kapa.ai•2w ago

<@166602211780984832> Kapa.ai is still learning and improving, please let me know how I did by reacting below.

Gaming

Programming

Mongoose 'Cannot overwrite `PhotoRequest` model once compiled.'

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