feat: Remove outdated migration

models/blogTag.js

@@ -0,0 +1,78 @@
+const mongoose = require('mongoose');
+
+const blogTagSchema = new mongoose.Schema({
+  name: {
+    type: String,
+    required: true,
+    trim: true,
+    unique: true // "WorkVisa"
+  },
+  slug: {
+    type: String,
+    required: true,
+    unique: true,
+    trim: true // "work-visa"
+  },
+  postCount: {
+    type: Number,
+    default: 0
+  },
+  isActive: {
+    type: Boolean,
+    default: true
+  }
+}, {
+  timestamps: true
+});
+
+// Indexes
+blogTagSchema.index({ slug: 1 });
+blogTagSchema.index({ isActive: 1, name: 1 });
+
+// Remove __v from JSON output
+blogTagSchema.set('toJSON', {
+  transform: function(doc, ret) {
+    delete ret.__v;
+    return ret;
+  }
+});
+
+// Pre-save middleware
+blogTagSchema.pre('save', function(next) {
+  // Auto-generate slug if not provided
+  if (!this.slug && this.name) {
+    this.slug = this.name
+      .toLowerCase()
+      .replace(/[^a-z0-9\s-]/g, '')
+      .replace(/\s+/g, '-')
+      .replace(/-+/g, '-')
+      .trim('-');
+  }
+  
+  next();
+});
+
+// Static methods
+blogTagSchema.statics.getActive = function() {
+  return this.find({ isActive: true }).sort({ name: 1 });
+};
+
+blogTagSchema.statics.getPopular = function(limit = 10) {
+  return this.find({ isActive: true })
+    .sort({ postCount: -1, name: 1 })
+    .limit(limit);
+};
+
+// Method to update post count
+blogTagSchema.methods.updatePostCount = async function() {
+  const Blog = require('./blog');
+  const count = await Blog.countDocuments({ 
+    tags: { $in: [this.name] }, // Tìm trong array tags
+    status: 'published' 
+  });
+  this.postCount = count;
+  await this.save();
+  return count;
+};
+
+module.exports = mongoose.model('BlogTag', blogTagSchema);