mirror of
https://github.com/jbranchaud/til
synced 2026-01-02 22:58:01 +00:00
27 lines
1.1 KiB
Markdown
27 lines
1.1 KiB
Markdown
# Generate A Model
|
||
|
||
The `rails` CLI comes with a variety of generators. Perhaps the mostly common
|
||
one to use is the _model_ generator.
|
||
|
||
The model generator will create a migration and a model file for the entity
|
||
that you name. In the following example `Book` will result in a
|
||
`app/models/book.rb` file as well as a migration file for a `books` table.
|
||
These generators know the singular and plural conventions.
|
||
|
||
At the end of the command is a series of field definitions containing the field
|
||
_name_ and field _type_. These are used in the migration file for defining
|
||
columns on the new table.
|
||
|
||
```bash
|
||
❯ bin/rails generate model Book title:string publication_date:date author:string
|
||
invoke active_record
|
||
create db/migrate/20240920223447_create_books.rb
|
||
create app/models/book.rb
|
||
invoke rspec
|
||
create spec/models/book_spec.rb
|
||
```
|
||
|
||
You may also notice that an `rspec` action was invoked as part of this
|
||
generator. That is because I have the `rspec-rails` gem in my project. That gem
|
||
hooks into the model generator so that a model spec also gets generated. Handy!
|