Update scope & Support :prefix to association methods

lib/acts_as_pasting/pastable.rb

@@ -11,26 +11,32 @@ module ActsAsPasting
       # ary => [obj, obj]
       scope :pasted_with_any, ->(ary, prefix: '') {
         ary = parsed_condition_ary(ary)
-        ids = ary.map do |klass, id|
-          joins(:pastings).where(acts_as_pasting_pastings: {
-            pasted_type: klass.constantize.base_class.name, pasted_id: id, type: prefix
-          }).pluck(:id)
-        end.reduce(:|)
-        where(id: ids)
+        arel = Arel::Table.new(:acts_as_pasting_pastings, as: "acts_as_pasting_pastings_#{SecureRandom.hex(10)}")
+        source_arel = arel_table
+        join_condition = ary.group_by(&:first).map do |(klass, value)|
+          ids = value.map(&:last)
+          arel[:pasted_type].eq(klass.constantize.base_class.name).
+            and(arel[:pasted_id].in(ids)).
+            and(arel[:pasteable_id].eq(source_arel[:id])).
+            and((arel[:type].eq(prefix))
+        end.reduce(:or)
+        joins(arel.join(arel).on(join_condition).join_sources).distinct
       }
 
       scope :pasted_with_all, ->(ary, prefix: '') {
         ary = parsed_condition_ary(ary)
-        ids = ary.map do |klass, id|
-          joins(:pastings).where(acts_as_pasting_pastings: {
-            pasted_type: klass.constantize.base_class.name, pasted_id: id, type: prefix
-          }).pluck(:id)
-        end.reduce(:&)
-        where(id: ids)
+        ary.reduce(where(nil)) do |association, value|
+          association.pasted_with_any([value], prefix: prefix)
+        end
       }
     end
 
     module ClassMethods
+      def acts_as_pastable associations, options={}, prefix: ''
+        pasting_name = prefix.blank? ? :pastings : [prefix, 'pastings'].join('_').to_sym
+        has_many pasting_name, as: :pasteable, class_name: 'ActsAsPasting::Pasting'
+        has_many associations, through: pasting_name, source: :pasted, **options
+      end
     end
   end
 end

lib/acts_as_pasting/pasteable.rb

-module ActsAsPasting
-  module Pasteable
-    extend ActiveSupport::Concern
-
-    # 带 prefix 的 pasted_with，独立于不带 prefix 的之外
-    included do
-      has_many :pastings, as: :pasteable, class_name: 'ActsAsPasting::Pasting'
-      has_many :hosts, through: :pastings
-
-      # ary => [[klass, id], [klass, id]]
-      # ary => [obj, obj]
-      scope :pasted_with_any, ->(ary, prefix: '') {
-        ary = parsed_condition_ary(ary)
-        ids = ary.map do |klass, id|
-          joins(:pastings).where(acts_as_pasting_pastings: {
-            pasted_type: klass.constantize.base_class.name, pasted_id: id, type: prefix
-          }).pluck(:id)
-        end.reduce(:|)
-        where(id: ids)
-      }
-
-      scope :pasted_with_all, ->(ary, prefix: '') {
-        ary = parsed_condition_ary(ary)
-        ids = ary.map do |klass, id|
-          joins(:pastings).where(acts_as_pasting_pastings: {
-            pasted_type: klass.constantize.base_class.name, pasted_id: id, type: prefix
-          }).pluck(:id)
-        end.reduce(:&)
-        where(id: ids)
-      }
-    end
-
-    module ClassMethods
-      def acts_as_pastable associations, options={}
-        has_many :pastings, as: :pasteable, class_name: 'ActsAsPasting::Pasting'
-        has_many associations, through: :pastings, source: :pasted, **options
-      end
-    end
-  end
-end

lib/acts_as_pasting/pasted.rb

@@ -9,22 +9,23 @@ module ActsAsPasting
       # ary => [obj, obj]
       scope :pasted_with_any, ->(ary, prefix: '') {
         ary = parsed_condition_ary(ary)
-        ids = ary.map do |klass, id|
-          joins(:pastings).where(acts_as_pasting_pastings: {
-            pasteable_type: klass.constantize.base_class.name, pasteable_id: id, type: prefix
-          }).pluck(:id)
-        end.reduce(:|)
-        where(id: ids)
+        arel = Arel::Table.new(:acts_as_pasting_pastings, as: "acts_as_pasting_pastings_#{SecureRandom.hex(10)}")
+        source_arel = arel_table
+        join_condition = ary.group_by(&:first).map do |(klass, value)|
+          ids = value.map(&:last)
+          arel[:pasteable_type].eq(klass.constantize.base_class.name).
+            and(arel[:pasteable_id].in(ids)).
+            and(arel[:pasted_id].eq(source_arel[:id])).
+            and((arel[:type].eq(prefix))
+        end.reduce(:or)
+        joins(arel.join(arel).on(join_condition).join_sources).distinct
       }
 
       scope :pasted_with_all, ->(ary, prefix: '') {
         ary = parsed_condition_ary(ary)
-        ids = ary.map do |klass, id|
-          joins(:pastings).where(acts_as_pasting_pastings: {
-            pasteable_type: klass.constantize.base_class.name, pasteable_id: id, type: prefix
-          }).pluck(:id)
-        end.reduce(:&)
-        where(id: ids)
+        ary.reduce(where(nil)) do |association, value|
+          association.pasted_with_any([value], prefix: prefix)
+        end
       }
 
       after_create :save_paste_list
@@ -200,8 +201,10 @@ module ActsAsPasting
         end
       end
 
-      def acts_as_pasted associations, options={}
-        has_many associations, through: :pastings, source: :pasteable, **options
+      def acts_as_pasted associations, options={}, prefix: ''
+        pasting_name = prefix.blank? ? :pastings : [prefix, 'pastings'].join('_').to_sym
+        has_many pasting_name, -> { where(type: prefix) }, class_name: 'ActsAsPasting::Pasting', as: :pasted
+        has_many associations, through: pasting_name, source: :pasteable, **options
       end
     end