work in progress: some appraisals fixes

zharikovpro · Dec 23, 2016 · 1f5aedc · 1f5aedc
1 parent fa4c678
commit 1f5aedc
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Showing 2 changed files with 12 additions and 22 deletions.
diff --git a/lib/acts_as_list/active_record/acts/list.rb b/lib/acts_as_list/active_record/acts/list.rb
@@ -326,7 +326,9 @@ def shuffle_positions_on_intermediate_items(old_position, new_position, avoid_id
           # unique constraint prevents regular increment_all and forces to do increments one by one
           # http://stackoverflow.com/questions/7703196/sqlite-increment-unique-integer-field
           # both SQLite and PostgreSQL (and most probably MySQL too) has same issue
-          update_one_by_one = acts_as_list_list.connection.index_exists?(acts_as_list_list.table_name, position_column, unique: true)
+
+          # we cannot reliably detect unique and other constraints across all environments (Rails 3, sqlite, etc)
+          # thus will sequentially update every item one by one
 
           if old_position < new_position
             # Decrement position of intermediate items
@@ -337,14 +339,8 @@ def shuffle_positions_on_intermediate_items(old_position, new_position, avoid_id
               "#{quoted_position_column_with_table_name} > ?", old_position
             ).where(
               "#{quoted_position_column_with_table_name} <= ?", new_position
-            )
-
-            if update_one_by_one
-              items.order("#{quoted_position_column_with_table_name} ASC").ids.each do |id|
-                acts_as_list_list.find(id).decrement!(position_column)
-              end
-            else
-              items.decrement_all
+            ).order("#{quoted_position_column_with_table_name} ASC").pluck(:id).each do |id|
+              acts_as_list_list.find(id).decrement!(position_column)
             end
           else
             # Increment position of intermediate items
@@ -355,14 +351,8 @@ def shuffle_positions_on_intermediate_items(old_position, new_position, avoid_id
               "#{quoted_position_column_with_table_name} >= ?", new_position
             ).where(
               "#{quoted_position_column_with_table_name} < ?", old_position
-            )
-
-            if update_one_by_one
-              items.order("#{quoted_position_column_with_table_name} DESC").ids.each do |id|
-                acts_as_list_list.find(id).increment!(position_column)
-              end
-            else
-              items.increment_all
+            ).order("#{quoted_position_column_with_table_name} DESC").pluck(:id).each do |id|
+              acts_as_list_list.find(id).increment!(position_column)
             end
           end
         end

diff --git a/test/test_list.rb b/test/test_list.rb
@@ -19,7 +19,11 @@ def setup_db(position_options = {})
     t.column :updated_at, :datetime
     t.column :state, :integer
 
-    t.index :pos, unique: true if position_options[:unique] && !(sqlite && position_options[:positive])
+    if position_options[:unique] && !(sqlite && position_options[:positive])
+      if t.respond_to?(:index)
+        t.index :pos, unique: true
+      end
+    end
   end
 
   if position_options[:positive]
@@ -809,18 +813,14 @@ def setup
   def test_insert_at
     new = DefaultScopedMixin.create
     assert_equal 5, new.pos
-    assert_equal [1, 2, 3, 4, 5], DefaultScopedMixin.all.order(id: :asc).pluck(:pos)
 
     new.insert_at(1)
     assert_equal 1, new.pos
-    assert_equal [1, 2, 3, 4, 5], DefaultScopedMixin.all.order(id: :asc).pluck(:pos)
 
     new.insert_at(5)
     assert_equal 5, new.pos
-    assert_equal [1, 2, 3, 4, 5], DefaultScopedMixin.all.order(id: :asc).pluck(:pos)
 
     new.insert_at(3)
     assert_equal 3, new.pos
-    assert_equal [1, 2, 3, 4, 5], DefaultScopedMixin.all.order(id: :asc).pluck(:pos)
   end
 end