yonycalsin / nestjs-sequelize-seeder Goto Github PK

Hi i'm getting this error from time to time when my nestjs project is reloading due to changes in the code. I run it in watch mode locally so it reloads the seeder everytime so I have data to debug.

Here is the error, made it more generic, but it basically says that the Foreign Key ID in the table I want to reference does not exist yet:
[Seeder] [ERROR...] Cannot add or update a child row: a foreign key constraint fails (database.Table1, CONSTRAINT Constraint_ibfk_1 FOREIGN KEY (ForeignKeyId) REFERENCES Table2 (id) ON DELETE NO ACTION ON UPDATE CASCADE)

E.g.:

Loading cat row into db before the row for breedId 2 has been loaded results in the error above.

First loaded
Cat: {
id = 1;
breedId = 2;
}

Loaded second
Breed: {
id = 2;
name = persian;
}

It can also be the order, of the execution.

For example, when sequelize returns an error, when creating a new object for your model, there the id will increase, therefore the added associations will not match.

First you will have to execute the tables in their proper order, for example, if you create a breed and cat table, and associate it, then you will have to execute the breed table first and then cat, since the cat table depends on the breed table.

With nestjs it's easy to sort, the modules.

Module({
   imports: [
      // First
      BreedModule,
      // Second
      CatModule,
   ],
});
class AppModule {}

For the 'Breed' seed

const data = [
   {
      // Here don't forget to add the id
      id: 1,
      name: 'persian',
   },
];

For the 'Cat' seed

const data = [
   {
      // You'll also have to add an id, to save us some trouble
      id: 1,
      breedId: 1,
   },
];

I hope this helps you!

Originally posted by @yoicalsin in #12 (comment)

@yoicalsin

Junction table issue

I'd also like to point out i'm using a junction table for my CatBreed many-to-many relation. I'm having some issues with this as well. The db cant find the FK relation id's of the Cat & Breed models (example: catId, breedId).
This worked perfectly in v1.0.7 of "nestjs-sequelize-seeder"

At the moment those error logs have stopped appearing after playing around with the settings, not sure if it's still there or not. Just going to mention it anyway.

Here is my junction table seeder:

@Seeder({
    unique: [],
    model: CatBreed
})
export class SeedCatBreeds implements OnSeederInit {
    run() {
        return [
            {id: 1, catId: 1, breedId: 1},
            {id: 2, catId: 1, breedId: 4},
            {id: 3, catId: 2, breedId: 2},
            {id: 4, catId: 2, breedId: 3},
        ] as CatBreed[];
    }
}

my junction table model:

@Table
export class CatBreed extends Model<CatBreed> {
    @PrimaryKey
    @AutoIncrement
    @Column
    id: number;

    @ForeignKey(() => Breed)
    @Column
    breedId: number;
    @BelongsTo(() => Breed)
    breed: Breed;

    @ForeignKey(() => Cat)
    @Column
    catId: number;
    @BelongsTo(() => Cat)
    cat: Cat;
}

this is another error, which is a weird one, since CatBreed does not have a name column... why would it look for that

@Seeder({
    model: Cat,
    unique: ['name'], // -> this gives an error:
                        // Error: [SeederService] Unknown column 'CatBreed.name' in 'where clause'
})
export class SeedCats implements OnSeederInit {
    run() {
        return [
            {
                id: 1,
                name: 'Mr Mistofeles',
            },
        ]
    }
}

getting validationErrors often as well :

Unhandled rejection SequelizeUniqueConstraintError: Validation error
    at Query.formatError (/mnt/b020cfba-0b36-4fcc-b0d7-3edea52ca1b3/courses/nestjs-course/node_modules/sequelize/lib/dialects/mysql/query.js:223:16)
    at Execute.handler [as onResult] (/mnt/b020cfba-0b36-4fcc-b0d7-3edea52ca1b3/courses/nestjs-course/node_modules/sequelize/lib/dialects/mysql/query.js:51:23)
    at Execute.execute (/mnt/b020cfba-0b36-4fcc-b0d7-3edea52ca1b3/courses/nestjs-course/node_modules/mysql2/lib/commands/command.js:30:14)
    at Connection.handlePacket (/mnt/b020cfba-0b36-4fcc-b0d7-3edea52ca1b3/courses/nestjs-course/node_modules/mysql2/lib/connection.js:417:32)
    at PacketParser.onPacket (/mnt/b020cfba-0b36-4fcc-b0d7-3edea52ca1b3/courses/nestjs-course/node_modules/mysql2/lib/connection.js:75:12)
    at PacketParser.executeStart (/mnt/b020cfba-0b36-4fcc-b0d7-3edea52ca1b3/courses/nestjs-course/node_modules/mysql2/lib/packet_parser.js:75:16)
    at Socket.<anonymous> (/mnt/b020cfba-0b36-4fcc-b0d7-3edea52ca1b3/courses/nestjs-course/node_modules/mysql2/lib/connection.js:82:25)
    at Socket.emit (events.js:311:20)
    at addChunk (_stream_readable.js:294:12)
    at readableAddChunk (_stream_readable.js:275:11)
    at Socket.Readable.push (_stream_readable.js:209:10)
    at TCP.onStreamRead (internal/stream_base_commons.js:186:23)

also still getting this error:

Unhandled rejection SequelizeForeignKeyConstraintError: Cannot add or update a child row: a foreign key constraint fails (`animals`.`CatBreeds`, CONSTRAINT `CatBreeds_ibfk_1` FOREIGN KEY (`catId`) REFERENCES `Cats` (`id`) ON DELETE CASCADE ON UPDATE CASCADE)

I think this error is caused due to the "cat" that needs to be referenced isn't loaded yet.
I've kept an eye in terms of order of loading modules & seeders where the ones with FK's get loaded last.
So that's not the issue I think.

I've also deleted the database as well.

These are my settings for sequilize and the seeder module

SequelizeModule.forRootAsync({
        useFactory: () => {
            return {
                ...
                autoLoadModels: true,
                synchronize: true,
                sync: {
                    force: true,
                },
                ...
            };
        },
    }),

SeederModule.forRoot({
    isGlobal: true,
    logging: true,
    connection: 'animals',
}),

package.json

"nestjs-sequelize-seeder": "~1.0.9",
"sequelize": "^5.21.6",
"sequelize-cli": "^5.5.1",
"sequelize-typescript": "^1.1.0",
"@nestjs/sequelize": "^0.1.0",
"@types/sequelize": "^4.28.8",
"mysql2": "^2.1.0",

I'm using v1.0.7 at the moment of this nestjs-sequelize-seeder library because the newest one is broken or something.
I've switched from MySQL to PostgreSQL and now i'm getting undefined errors in my logs without any further detailed explanation.