update

models/Vocab.js

@@ -24,16 +24,9 @@ const Vocab = sequelize.define('Vocab', {
       allowNull: false, 
       index: true 
     },
-    // Đã xuất hiện trong khối nào, bài học nào, lesson nào
-    // Ví dụ 111 là grade 1, unit 1, lesson 1
-    grade: {
-      type: DataTypes.INTEGER,
-      defaultValue: 0,
-      comment: 'It is number of gradeX100 + unitX10 + lesson (e.g., Grade 1 Unit 2 Lesson 3 = 123)'
-    },
     // Loại biến thể (V1, V2, V3, V_ing, Noun_Form...)
     form_key: { 
-      type: DataTypes.JSON, 
+      type: DataTypes.TEXT, 
       defaultValue: 'base',
       comment: 'Form key indicating the type of word form (e.g., base, V1, V2, V3, V_ing, Noun_Form)'
     },
@@ -47,10 +40,6 @@ const Vocab = sequelize.define('Vocab', {
       type: DataTypes.STRING(100),
       comment: 'Category of the word (e.g., Action Verbs, Nouns)'
     },
-    etc : {
-      type: DataTypes.TEXT,
-      comment: 'Book or additional reference'
-    },
     topic: {
       type: DataTypes.STRING(100),
       comment: 'Topic of the word (e.g., Food, Travel, Education)'
@@ -121,10 +110,6 @@ const Vocab = sequelize.define('Vocab', {
       {
         name: 'idx_category',
         fields: ['category']
-      },
-      {
-        name: 'idx_grade',
-        fields: ['grade']
       }
     ]
   });