Hooks are not working

[Muhammedalihudaybergenow]

I have a model. And Added Hooks Before Save and After Create They Are both not instantiating uuid of my AccessModel.
import {
Column,
DataType,
BelongsTo,
Table,
BeforeCreate,
BeforeValidate,
AfterCreate,
BeforeSave
} from 'sequelize-typescript';
import { SequelizeModelHelper } from 'src/common/helpers';
import { AccessInterface } from 'src/modules/companies/managements/staffs/employees/accesses/interfaces';
import { v4 } from 'uuid';
import { AccessModelDto, CreateAccessModelDto } from '../dto';
@table({
tableName: 'accesses',
modelName: 'AccessModel'
})
export class AccessModel extends SequelizeModelHelper {
@column({
field: 'title',
type: DataType.STRING
// //defaultValue: ''
})
title: string;

@Column({
    field: 'models',
    type: DataType.JSONB
    // //defaultValue: []
})
models: CreateAccessModelDto[];

@Column({
    field: 'division_ids',
    type: DataType.ARRAY(DataType.INTEGER)
    // //defaultValue: []
})
divisionIds: number[] = [];

@Column({
    field: 'department_ids',
    type: DataType.ARRAY(DataType.INTEGER)
    // //defaultValue: []
})
departmentIds: number[] = [];

@Column({
    field: 'company_ids',
    type: DataType.ARRAY(DataType.INTEGER)
    // //defaultValue: []
})
companyIds: number[];

@Column({
    field: 'asset_tree_ids',
    type: DataType.ARRAY(DataType.INTEGER)
    // //defaultValue: []
})
assetTreeIds: number[];

@Column({
    field: 'employee_ids',
    type: DataType.ARRAY(DataType.INTEGER)
    // //defaultValue: []
})
employeeIds: number[];

@Column({
    field: 'is_active',
    type: DataType.BOOLEAN
    // //defaultValue: true
})
isActive: boolean;

@BeforeSave
static async setUuid(instance: AccessModel) {
    console.log(true);
    if (!instance.uuid) {
        instance.uuid = v4();
    }
}
constructor(entity?: Partial<AccessModel>) {
    super();
    Object.assign(this, entity);
}

}
And The Error is SequelizeValidationError: notNull Violation: AccessModel.uuid cannot be null

[yagmurcicekdagi]

You need to explicitly define your uuid field something like this:

uuid: {
      type: DataTypes.UUID,
      defaultValue: DataTypes.UUIDV4,  // you should use "defaultValue: UUDV4" instead if your database doesn't have native UUID support
      primaryKey: true,
      allowNull: false,
    },

If you set up your uuid field to use UUDV4 as the default value, I'm not sure if you'd still need this @BeforeSave hook as Sequelize will automatically generate a UUID if one isn't provided when creating a new instance.

[Muhammedalihudaybergenow]

No that is not the case if i attach default property to the column decorator after receiving entity record from database, in a case when don't select uuid attribute it will define uuid property to the entity