audiobookshelf/server/models/BookGenre.js

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const { DataTypes, Model } = require('sequelize')
module.exports = (sequelize) => {
class BookGenre extends Model { }
BookGenre.init({
id: {
type: DataTypes.UUID,
defaultValue: DataTypes.UUIDV4,
primaryKey: true
}
}, {
sequelize,
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modelName: 'bookGenre',
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timestamps: false
})
// Super Many-to-Many
// ref: https://sequelize.org/docs/v6/advanced-association-concepts/advanced-many-to-many/#the-best-of-both-worlds-the-super-many-to-many-relationship
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const { book, genre } = sequelize.models
book.belongsToMany(genre, { through: BookGenre })
genre.belongsToMany(book, { through: BookGenre })
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book.hasMany(BookGenre)
BookGenre.belongsTo(book)
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genre.hasMany(BookGenre)
BookGenre.belongsTo(genre)
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return BookGenre
}