fixup! Add support for Rails 5.2

lib/schema_plus/indexes/active_record/connection_adapters/index_definition_5_2.rb

@@ -23,7 +23,11 @@ def initialize(*args) #:nodoc:
           unless orders.blank?
             # fill out orders with :asc when undefined.  make sure hash ordering
             # follows column ordering.
-            self.orders = Hash[columns.map{|column| [column, orders[column] || :asc]}]
+            if self.orders.is_a?(Hash)
+              self.orders = Hash[columns.map{|column| [column, orders[column] || :asc]}]
+            else
+              self.orders = Hash[columns.map{|column| [column, orders || :asc]}]
+            end
           end
         end
 

spec/index_spec.rb

@@ -53,6 +53,11 @@ class Post < ::ActiveRecord::Base ; end
       expect(index_for([:login, :deleted_at]).orders).to eq({"login" => :desc, "deleted_at" => :asc})
     end
 
+    it "should assign order (all same direction)", :mysql => :skip do
+      add_index(:users, [:login, :deleted_at], :order => {:login => :desc, :deleted_at => :desc})
+      expect(index_for([:login, :deleted_at]).orders).to eq({"login" => :desc, "deleted_at" => :desc})
+    end
+
     context "for duplicate index" do
       it "should not complain if the index is the same" do
         add_index(:users, :login)