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Diffstat (limited to 'app/models/concerns/sortable.rb')
| -rw-r--r-- | app/models/concerns/sortable.rb | 23 |
1 files changed, 23 insertions, 0 deletions
diff --git a/app/models/concerns/sortable.rb b/app/models/concerns/sortable.rb index a155a064032..fdacfa5a194 100644 --- a/app/models/concerns/sortable.rb +++ b/app/models/concerns/sortable.rb @@ -5,6 +5,25 @@ module Sortable extend ActiveSupport::Concern + module DropDefaultScopeOnFinders + # Override these methods to drop the `ORDER BY id DESC` default scope. + # See http://dba.stackexchange.com/a/110919 for why we do this. + %i[find find_by find_by!].each do |meth| + define_method meth do |*args, &block| + return super(*args, &block) if block + + unordered_relation = unscope(:order) + + # We cannot simply call `meth` on `unscope(:order)`, since that is also + # an instance of the same relation class this module is included into, + # which means we'd get infinite recursion. + # We explicitly use the original implementation to prevent this. + original_impl = method(__method__).super_method.unbind + original_impl.bind(unordered_relation).call(*args) + end + end + end + included do # By default all models should be ordered # by created_at field starting from newest @@ -18,6 +37,10 @@ module Sortable scope :order_updated_asc, -> { reorder(updated_at: :asc) } scope :order_name_asc, -> { reorder(name: :asc) } scope :order_name_desc, -> { reorder(name: :desc) } + + # All queries (relations) on this model are instances of this `relation_klass`. + relation_klass = relation_delegate_class(ActiveRecord::Relation) + relation_klass.prepend DropDefaultScopeOnFinders end module ClassMethods |