Fix Rails 4.2 spec error.

lib/squeel/adapters/active_record/4.2/relation_extensions.rb

@@ -17,6 +17,31 @@ def reverse_order!
           self
         end
 
+        def build_arel
+          arel = Arel::SelectManager.new(table.engine, table)
+
+          build_joins(arel, joins_values.flatten) unless joins_values.empty?
+
+          collapse_wheres(arel, where_visit((where_values - ['']).uniq))
+
+          arel.having(*having_visit(having_values.uniq.reject{|h| h.blank?})) unless having_values.empty?
+
+          arel.take(connection.sanitize_limit(limit_value)) if limit_value
+          arel.skip(offset_value.to_i) if offset_value
+
+          arel.group(*group_visit(group_values.uniq.reject{|g| g.blank?})) unless group_values.empty?
+
+          build_order(arel)
+
+          build_select(arel, select_visit(select_values.uniq))
+
+          arel.distinct(distinct_value)
+          arel.from(build_from) if from_value
+          arel.lock(lock_value) if lock_value
+
+          arel
+        end
+
         def build_join_dependency(manager, joins)
           buckets = joins.group_by do |join|
             case join
@@ -88,13 +113,8 @@ def where_values_hash_with_squeel(relation_table_name = table_name)
 
         def expand_attrs_from_hash(opts)
           opts = ::ActiveRecord::PredicateBuilder.resolve_column_aliases(klass, opts)
-
-          bind_args = [opts]
-          # Active Record 4.1 compatibility
-          # (for commits before 08579e4078454c6058f1289b58bf5bfa26661376 - https://github.com/rails/rails/commit/08579e4078454c6058f1289b58bf5bfa26661376)
-          bind_args << bind_values.length if method(:create_binds).arity > 1
-          tmp_opts, bind_values = create_binds(*bind_args)
 
+          tmp_opts, bind_values = create_binds(opts)
           self.bind_values += bind_values
 
           attributes = @klass.send(:expand_hash_conditions_for_aggregates, tmp_opts)

spec/squeel/adapters/active_record/relation_extensions_spec.rb

@@ -134,7 +134,12 @@ module ActiveRecord
             })
 
             arel = relation.build_arel
-            arel.to_sql.should match /#{Q}parents_people_2#{Q}.#{Q}name#{Q} = 'bob'/
+
+            if activerecord_version_at_least('4.2.0')
+              arel.to_sql.should match /#{Q}parents_people_2#{Q}.#{Q}name#{Q} = ?/
+            else
+              arel.to_sql.should match /#{Q}parents_people_2#{Q}.#{Q}name#{Q} = 'bob'/
+            end
           end
 
           it 'combines multiple conditions of the same type against the same column with AND' do
@@ -174,7 +179,12 @@ module ActiveRecord
             })
 
             arel = relation.build_arel
-            arel.to_sql.should match /HAVING #{Q}parents_people_2#{Q}.#{Q}name#{Q} = 'joe'/
+
+            if activerecord_version_at_least('4.2.0')
+              arel.to_sql.should match /HAVING #{Q}parents_people_2#{Q}.#{Q}name#{Q} = ?/
+            else
+              arel.to_sql.should match /HAVING #{Q}parents_people_2#{Q}.#{Q}name#{Q} = 'joe'/
+            end
           end
 
           it 'maps orders inside a hash to their appropriate association table' do