Build up named scopes conditionally.
First specify it in your Rails config.
config.gem 'ryanb-scope-builder', :lib => 'scope_builder', :source => 'gems.github.com'
And then install it.
Rails 2.1 or later required.
This gem adds the scope_builder method to all Active Record models. A builder behaves exactly like any other named scope except that calling other named scopes on it will alter the builder itself rather than returning a new named scope.
builder = Product.scope_builder builder.released.visible # call a couple named scopes to change builder builder.cheap if only_show_cheap_products? # build scopes conditionally
The scope_builder method can also take a block which will return the builder. This is useful when you are using the builder in a model search method.
# in product model def self.search(options) scope_builder do |builder| builder.released.visible builder.cheap if options[:cheap] end end
The scope_builder method can also be called on an existing scope.
products = Product.released.visible builder = products.scope_builder builder.cheap if only_show_cheap_products?
This project can be found on github at the following URL.
If you would like to contribute to this project, please fork the repository and send me a pull request.