Make `:auto_increment` to internal primary key option

Using `:auto_increment` option for abstracting the DB-specific auto
incremental types. It is worth to ease to implement the compatibility
layer.

1 files changed, 23 insertions, 0 deletions

diff --git a/activerecord/lib/active_record/connection_adapters/sqlite3/schema_definitions.rb b/activerecord/lib/active_record/connection_adapters/sqlite3/schema_definitions.rb
new file mode 100644
index 0000000000..5d1e8811f8
--- /dev/null
+++ b/activerecord/lib/active_record/connection_adapters/sqlite3/schema_definitions.rb
@@ -0,0 +1,23 @@
+module ActiveRecord
+  module ConnectionAdapters
+    module SQLite3
+      module ColumnMethods
+        def primary_key(name, type = :primary_key, **options)
+          if options.delete(:auto_increment) == true && type == :integer
+            type = :primary_key
+          end
+
+          super
+        end
+      end
+
+      class TableDefinition < ActiveRecord::ConnectionAdapters::TableDefinition
+        include ColumnMethods
+      end
+
+      class Table < ActiveRecord::ConnectionAdapters::Table
+        include ColumnMethods
+      end
+    end
+  end
+end