Nest: What is the best method of providing mongoose schemas in order to populate() ?

Created on 19 Jan 2018  路  4Comments  路  Source: nestjs/nest

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[ ] Regression 
[X ] Bug report
[ ] Feature request
[ ] Documentation issue or request
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Current behavior

I have the following component, and am trying to populate fields from related models in the API response. However I get this error: 

[Nest] 5581   - 2018-1-19 14:04:53   [ExceptionsHandler] Schema hasn't been registered for model "Material".
Use mongoose.model(name, schema)
MissingSchemaError: Schema hasn't been registered for model "Material".
Use mongoose.model(name, schema)
    at new MissingSchemaError

I have tried creating modules for for Size and Material, and importing them into Products module, but get the same issue. Any guidance would be much appreciated:)

Controller:

@Component()
export class ProductsService {
    constructor(@InjectModel(ProductSchema) private readonly productModel: Model<Product>) {
    }

    async create(createProductDto: CreateProductDto): Promise<Product> {
        const createdProduct = new this.productModel(createProductDto);
        return await createdProduct.save();
    }

    async findAll(): Promise<Product[]> {
        return await this.productModel.find()
            .populate('material')
            .populate('size')
            .exec();
    }
}

and module:

@Module({
    imports: [
        MongooseModule.forFeature([{name: 'Product', schema: ProductSchema}]),
    ],
    controllers: [ProdcutsController],
    components: [ProductsService]
})
export class ProdcutsModule {
}

and Products Schema:

export const ProductSchema = new mongoose.Schema({
    name: String,
    description: String,
    size: {type: mongoose.Schema.Types.ObjectId, ref: 'Size'},
    material: {type: mongoose.Schema.Types.ObjectId, ref: 'Material'},
    range: {type: mongoose.Schema.Types.ObjectId, ref: 'Range'}
}, {
    timestamps: true
});

Environment



Nest version: 4.5.8





For Tooling issues:



    

  • Node version: 9.20
    • 

  • Platform: Ubuntu
    •
picture zatomik

Most helpful comment

Just contributing for future finders, you can also import the Model at the module level like so

@Module({
  imports: [MongooseModule.forFeature([
    {name: 'Product', schema: ProductSchema}
    {name: 'Size', schema: SizeSchema}, // adding SizeSchema here
    {name: 'Material', schema: MaterialSchema}, // adding MaterialSchema here
  ])],
  controllers: [ProdcutsController],
  components: [ProductsService]
})
export class ProductsModule {}

which will allow you to inject it into your ProductsService provider/component like so:

@Component()
export class ProductsService {
  constructor(
    @InjectModel('ProductSchema') private readonly productModel: Model<Product>
    @InjectModel('SizeSchema') private readonly sizeModel: Model<Size> // inject Size here
    @InjectModel('MaterialSchema') private readonly materialModel: Model<Material> // inject Material here
  ) {}

  async create(createProductDto: CreateProductDto): Promise<Product> {
    const createdProduct = new this.productModel(createProductDto);
    return await createdProduct.save();
  }

  async findAll(): Promise<Product[]> {
    return await this.productModel.find()
      .populate('material', this.materialModel) // you can even reference the injections here if you need
      .populate('size', this.sizeModel)
      .exec();
  }
}
picture blaytenshi on 7 Feb 2019
👍4

All 4 comments

Ended up adding the schemas : 

    async findOne(id: number): Promise<Product[]> {

        const Size = mongoose.model('Size', SizeSchema);
        const Material = mongoose.model('Material', MaterialSchema);

        return await this.productModel.findById(id)
            .populate({
                path: 'size',
                model: Size
            })
            .populate({
                path: 'material',
                model: Material
            })
            .exec();
    }

Closing this, as I think its more of an issue with me being unfamilar with mongoose

zatomik picture zatomik on 19 Jan 2018

Just contributing for future finders, you can also import the Model at the module level like so

@Module({
  imports: [MongooseModule.forFeature([
    {name: 'Product', schema: ProductSchema}
    {name: 'Size', schema: SizeSchema}, // adding SizeSchema here
    {name: 'Material', schema: MaterialSchema}, // adding MaterialSchema here
  ])],
  controllers: [ProdcutsController],
  components: [ProductsService]
})
export class ProductsModule {}

which will allow you to inject it into your ProductsService provider/component like so:

@Component()
export class ProductsService {
  constructor(
    @InjectModel('ProductSchema') private readonly productModel: Model<Product>
    @InjectModel('SizeSchema') private readonly sizeModel: Model<Size> // inject Size here
    @InjectModel('MaterialSchema') private readonly materialModel: Model<Material> // inject Material here
  ) {}

  async create(createProductDto: CreateProductDto): Promise<Product> {
    const createdProduct = new this.productModel(createProductDto);
    return await createdProduct.save();
  }

  async findAll(): Promise<Product[]> {
    return await this.productModel.find()
      .populate('material', this.materialModel) // you can even reference the injections here if you need
      .populate('size', this.sizeModel)
      .exec();
  }
}
blaytenshi picture blaytenshi on 7 Feb 2019
👍4

Why do they call it a product model? It is a scheme as such, the models do not have to do with databases, an entity yes, a scheme yes, but a model does not ?

dcortesnet picture dcortesnet on 27 Jul 2019

This thread has been automatically locked since there has not been any recent activity after it was closed. Please open a new issue for related bugs.

lock[bot] picture lock[bot] on 25 Oct 2019
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