| ⇢ | A | Schema added | |
| ⇢ | A | Table added | |
| ⇢ | A | UserSchema added | |
| ⇢ | A | TweetSchema added | 
| ⇢ | A | Schema::getColumns() added | |
| ⇢ | A | TweetSchema::up() added | |
| ⇢ | A | ActiveRecord::exec() added | |
| ⇢ | A | UserSchema::up() added | |
| ⇢ | A | ActiveRecord::connection() added | |
| ⇢ | A | Table::__get() added | |
| ⇢ | A | TweetSchema::down() added | |
| ⇢ | A | Table::getColumns() added | |
| ⇢ | A | Table::unsigned() added | |
| ⇢ | A | Table::notNull() added | |
| ⋮ | view more | ||
| A | ↛ | ActiveRecord::config() removed | |