completed SMS gateway project

db/migrate/20251019070519_create_sms_messages.rb

@@ -0,0 +1,26 @@
+class CreateSmsMessages < ActiveRecord::Migration[8.0]
+  def change
+    create_table :sms_messages do |t|
+      t.references :gateway, foreign_key: true
+      t.string :message_id, null: false
+      t.string :direction, null: false
+      t.string :phone_number, null: false
+      t.text :message_body, null: false
+      t.string :status, default: "pending"
+      t.text :error_message
+      t.integer :retry_count, default: 0
+      t.datetime :sent_at
+      t.datetime :delivered_at
+      t.datetime :failed_at
+      t.jsonb :metadata, default: {}
+
+      t.timestamps
+    end
+
+    add_index :sms_messages, :message_id, unique: true
+    add_index :sms_messages, :phone_number
+    add_index :sms_messages, [:phone_number, :created_at]
+    add_index :sms_messages, [:status, :created_at]
+    add_index :sms_messages, :direction
+  end
+end