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