| ⇢ | A | Schema added | |
| ⇢ | A | Table added | |
| ⇢ | A | UserSchema added | |
| ⇢ | A | TweetSchema added | 
| ⇢ | A | Schema::getColumns() added | |
| ⇢ | A | TweetSchema::up() added | |
| ⇢ | A | Schema::run() added | |
| ⇢ | A | Table::increments() added | |
| ⇢ | A | Schema::onUpdate() added | |
| ⇢ | A | Table::timestamps() added | |
| ⇢ | A | Schema::fk() added | |
| ⇢ | A | Table::__set() added | |
| ⇢ | A | Schema::pk() added | |
| ⇢ | A | UserSchema::down() added | |
| ⋮ | view more | ||
| A | ↛ | ActiveRecord::config() removed | |