57 lines
1.3 KiB
JavaScript
57 lines
1.3 KiB
JavaScript
const { DataTypes } = require('sequelize');
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const { sequelize } = require('../config/database');
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const GrammarMapping = sequelize.define('GrammarMapping', {
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id: {
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type: DataTypes.UUID,
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defaultValue: DataTypes.UUIDV4,
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primaryKey: true
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},
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grammar_id: {
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type: DataTypes.UUID,
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allowNull: false,
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references: {
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model: 'grammars',
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key: 'id'
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},
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onDelete: 'CASCADE',
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comment: 'Foreign key to grammars table'
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},
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book_id: {
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type: DataTypes.STRING(100),
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allowNull: false,
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comment: 'Book identifier (e.g., "global-success-2")'
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},
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grade: {
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type: DataTypes.INTEGER,
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allowNull: false,
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comment: 'Grade level'
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},
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unit: {
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type: DataTypes.INTEGER,
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allowNull: true,
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comment: 'Unit number in the book'
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},
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lesson: {
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type: DataTypes.INTEGER,
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allowNull: true,
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comment: 'Lesson number within the unit'
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},
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context_note: {
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type: DataTypes.TEXT,
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allowNull: true,
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comment: 'Additional context about where this grammar appears'
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}
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}, {
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tableName: 'grammar_mappings',
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timestamps: true,
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indexes: [
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{ fields: ['grammar_id'] },
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{ fields: ['book_id'] },
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{ fields: ['grade'] },
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{ fields: ['book_id', 'grade', 'unit', 'lesson'] }
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]
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});
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module.exports = GrammarMapping;
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