Currently, I am developing a GraphQL API that utilizes TypeORM as the ORM to communicate with my PostgreSQL database. One of the challenges I am facing involves fetching products along with their corresponding images through GraphQL queries.
In this scenario, there are two tables: products
and images
. Each product is linked to multiple images stored in the images
table via a foreign key called product_id
, which references the id
column in the products
table.
Below is a simplified version of my GraphQL and TypeORM setup:
Product
Entity:
@Entity()
export class Product extends BaseEntity {
@PrimaryGeneratedColumn()
id!: number;
// Other columns...
@OneToMany(() => ProductImage, (image) => image.product)
images: ProductImage[];
}
ProductImage
Entity:
@Entity()
export class ProductImage extends BaseEntity {
@PrimaryGeneratedColumn()
id!: number;
@Column()
url!: string;
@Column()
productId!: number;
@ManyToOne(() => Product, (product) => product.images)
product: Product;
}
- GraphQL Query:
extendType({
type: 'Product',
definition(t) {
t.field('images', {
type: 'ProductImage',
list: true,
resolve(parent, _args, _context, _info): Promise<ProductImage[] | null> {
// Issue: The images are not being fetched correctly for the product.
return ProductImage.find({ where: { productId: parent.id } });
},
});
},
});
The challenge lies in the fact that when attempting to retrieve products with their images using the GraphQL query, the expected results are not achieved. The images
field returns null
, and the root cause of this issue remains unclear.
Is there something missing from either my GraphQL query or TypeORM configuration? Are there alternative methods to retrieve products and their associated images efficiently through GraphQL and TypeORM?
Your insights and assistance regarding this matter would be highly valuable. Thank you!