1 files changed, 5 insertions, 3 deletions
diff --git a/activerecord/lib/active_record/connection_adapters/abstract/schema_definitions.rb b/activerecord/lib/active_record/connection_adapters/abstract/schema_definitions.rb
index 1cda23dc1d..4f97c7c065 100644
--- a/activerecord/lib/active_record/connection_adapters/abstract/schema_definitions.rb
+++ b/activerecord/lib/active_record/connection_adapters/abstract/schema_definitions.rb
@@ -69,7 +69,7 @@ module ActiveRecord
       def initialize(
         name,
         polymorphic: false,
-        index: false,
+        index: true,
         foreign_key: false,
         type: :integer,
         **options
@@ -182,6 +182,7 @@ module ActiveRecord
           end
         CODE
       end
+      alias_method :numeric, :decimal
     end
 
     # Represents the schema of an SQL table in an abstract way. This class
@@ -211,7 +212,7 @@ module ActiveRecord
       def initialize(name, temporary, options, as = nil)
         @columns_hash = {}
         @indexes = {}
-        @foreign_keys = {}
+        @foreign_keys = []
         @primary_keys = nil
         @temporary = temporary
         @options = options
@@ -329,7 +330,7 @@ module ActiveRecord
       end
 
       def foreign_key(table_name, options = {}) # :nodoc:
-        foreign_keys[table_name] = options
+        foreign_keys.push([table_name, options])
       end
 
       # Appends <tt>:datetime</tt> columns <tt>:created_at</tt> and
@@ -436,6 +437,7 @@ module ActiveRecord
     #     t.bigint
     #     t.float
     #     t.decimal
+    #     t.numeric
     #     t.datetime
     #     t.timestamp
     #     t.time