In the past, we couldn't use `polymorphic_path` in many places. For instance, `polymorphic_path(budget, investment)` would return `budget_budget_investment_path`, while in our routes we had defined `budget_investment_path`. With the `resolve` method, introduced in Rails 5.1, we can use symbols to define we want it to use `investment` instead of `budget_investment`. It also works with nested resources, so now we can write `polymorphic_path(investment)`. This makes the code for `resource_hierarchy_for` almost impossible to understand. I reached this result after having a look at the internals of the `resolve` method in order to get its results and then remove the symbols we include. Note using this method will not make admin routes compatible with `polymorphic_path`. Quoting from the Rails documentation: > This custom behavior only applies to simple polymorphic URLs where a > single model instance is passed and not more complicated forms, e.g: > [example showing admin routes won't work] Also note that now the `admin_polymorphic_path` method will not work for every model due to inconsistencies in our admin routes. For instance, we define `groups` and `budget_investments`; we should either use the `budget_` prefix in all places or remove it everywhere. Right now the code only works for items with the prefix; it isn't a big deal because we never call it with an item without the prefix. Finally, for unknown reasons some routing tests fail if we use `polymorphic_path`, so we need to redefine that method in those tests and force the `only_path: true` option.
6 lines
138 B
Ruby
6 lines
138 B
Ruby
resources :communities, only: [:show] do
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resources :topics
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end
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resolve("Topic") { |topic, options| [topic.community, topic, options] }
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