nar__o narutoo9x
tlowrimore
/ union_scope.rb
Last active
January 13, 2023 21:12
Unions multiple scopes on a model, and returns an instance of ActiveRecord::Relation.
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| module ActiveRecord::UnionScope | |
| def self.included(base) | |
| base.send :extend, ClassMethods | |
| end | |
| module ClassMethods | |
| def union_scope(*scopes) | |
| id_column = "#{table_name}.#{primary_key}" | |
| sub_query = scopes.map { |s| s.select(id_column).to_sql }.join(" UNION ") | |
| where "#{id_column} IN (#{sub_query})" |