Dump indexes in `create_table` for generates SQL in one query

If the adapter supports indexes in create table, it generates SQL
in one query.

1 files changed, 33 insertions, 20 deletions

diff --git a/activerecord/lib/active_record/schema_dumper.rb b/activerecord/lib/active_record/schema_dumper.rb
index c2662ec476..301718b874 100644
--- a/activerecord/lib/active_record/schema_dumper.rb
+++ b/activerecord/lib/active_record/schema_dumper.rb
@@ -179,11 +179,11 @@ HEADER
             tbl.puts
           end
 
+          indexes_in_create(table, tbl)
+
           tbl.puts "  end"
           tbl.puts
 
-          indexes(table, tbl)
-
           tbl.rewind
           stream.print tbl.read
         rescue => e
@@ -195,27 +195,12 @@ HEADER
         stream
       end
 
+      # Keep it for indexing materialized views
       def indexes(table, stream)
         if (indexes = @connection.indexes(table)).any?
           add_index_statements = indexes.map do |index|
-            statement_parts = [
-              "add_index #{remove_prefix_and_suffix(index.table).inspect}",
-              index.columns.inspect,
-              "name: #{index.name.inspect}",
-            ]
-            statement_parts << 'unique: true' if index.unique
-
-            index_lengths = (index.lengths || []).compact
-            statement_parts << "length: #{Hash[index.columns.zip(index.lengths)].inspect}" if index_lengths.any?
-
-            index_orders = index.orders || {}
-            statement_parts << "order: #{index.orders.inspect}" if index_orders.any?
-            statement_parts << "where: #{index.where.inspect}" if index.where
-            statement_parts << "using: #{index.using.inspect}" if index.using
-            statement_parts << "type: #{index.type.inspect}" if index.type
-            statement_parts << "comment: #{index.comment.inspect}" if index.comment
-
-            "  #{statement_parts.join(', ')}"
+            table_name = remove_prefix_and_suffix(index.table).inspect
+            "  add_index #{([table_name]+index_parts(index)).join(', ')}"
           end
 
           stream.puts add_index_statements.sort.join("\n")
@@ -223,6 +208,34 @@ HEADER
         end
       end
 
+      def indexes_in_create(table, stream)
+        if (indexes = @connection.indexes(table)).any?
+          index_statements = indexes.map do |index|
+            "    t.index #{index_parts(index).join(', ')}"
+          end
+          stream.puts index_statements.sort.join("\n")
+        end
+      end
+
+      def index_parts(index)
+        index_parts = [
+          index.columns.inspect,
+          "name: #{index.name.inspect}",
+        ]
+        index_parts << 'unique: true' if index.unique
+
+        index_lengths = (index.lengths || []).compact
+        index_parts << "length: #{Hash[index.columns.zip(index.lengths)].inspect}" if index_lengths.any?
+
+        index_orders = index.orders || {}
+        index_parts << "order: #{index.orders.inspect}" if index_orders.any?
+        index_parts << "where: #{index.where.inspect}" if index.where
+        index_parts << "using: #{index.using.inspect}" if index.using
+        index_parts << "type: #{index.type.inspect}" if index.type
+        index_parts << "comment: #{index.comment.inspect}" if index.comment
+        index_parts
+      end
+
       def foreign_keys(table, stream)
         if (foreign_keys = @connection.foreign_keys(table)).any?
           add_foreign_key_statements = foreign_keys.map do |foreign_key|