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34 lines
1.0 KiB
Markdown
34 lines
1.0 KiB
Markdown
# Polymorphic Path Helpers
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Underlying many of the path helpers that we use day to day when building out
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the views in our Rails apps are a set of methods in the
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[`ActionDispatch::Routing::PolymorphicRoutes`](http://api.rubyonrails.org/classes/ActionDispatch/Routing/PolymorphicRoutes.html)
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module.
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The `#polymorphic_path` method given an instance of a model will produce the
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relevant show path.
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```ruby
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> app.polymorphic_path(Article.first)
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Article Load (0.5ms) SELECT "articles".* FROM "articles" ORDER BY "articles"."id" ASC LIMIT 1
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=> "/articles/2"
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```
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Given just the model's constant, it will produce the index path.
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```ruby
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> app.polymorphic_path(Article)
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=> "/articles"
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```
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Additionally, there are variants with `edit_` and `new_` prefixed for
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generating the edit and new paths respectively.
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```ruby
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> app.edit_polymorphic_path(Article.first)
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Article Load (0.6ms) SELECT "articles".* FROM "articles" ORDER BY "articles"."id" ASC LIMIT 1
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=> "/articles/2/edit"
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> app.new_polymorphic_path(Article)
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=> "/articles/new"
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```
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