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Merge pull request #40320 from mh-mobile/master 

[skip ci]  Fix examples for has_{one,many} :through :source and :source_type
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Ryuta Kamizono 2020-11-25 21:45:08 +09:00 committed by GitHub
parent dac18d25d7 9d547ec8c2
commit 870f9dfacb
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1 changed files with 8 additions and 3 deletions
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11
guides/source/association_basics.md
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@ -1351,9 +1351,14 @@ The `:source` option specifies the source association name for a `has_one :throu
The `:source_type` option specifies the source association type for a `has_one :through` association that proceeds through a polymorphic association.
```ruby
class Author < ApplicationRecord
has_one :book
has_one :hardback, through: :book, source: :format, source_type: "Hardback"
has_one :dust_jacket, through: :hardback
end
class Book < ApplicationRecord
has_one :format, polymorphic: true
has_one :dust_jacket, through: :format, source: :dust_jacket, source_type: "Hardback"
belongs_to :format, polymorphic: true
end
class Paperback < ApplicationRecord; end
@ -1819,7 +1824,7 @@ class Author < ApplicationRecord
end
class Book < ApplicationRecord
has_one :format, polymorphic: true
belongs_to :format, polymorphic: true
end
class Hardback < ApplicationRecord; end