Move the methods for schema dumping into `{mysql,postgresql}/schema_dumper.rb`

Current master branch includes many schema dumping improvements.
It extract these features to the appropriate files.

5 files changed, 107 insertions, 92 deletions

diff --git a/activerecord/lib/active_record/connection_adapters/abstract/schema_dumper.rb b/activerecord/lib/active_record/connection_adapters/abstract/schema_dumper.rb
index a2f58364a4..e252ddb4cf 100644
--- a/activerecord/lib/active_record/connection_adapters/abstract/schema_dumper.rb
+++ b/activerecord/lib/active_record/connection_adapters/abstract/schema_dumper.rb
@@ -20,7 +20,7 @@ module ActiveRecord
 
       # This can be overridden on an Adapter level basis to support other
       # extended datatypes (Example: Adding an array option in the
-      # PostgreSQLAdapter)
+      # PostgreSQL::ColumnDumper)
       def prepare_column_options(column)
         spec = {}
         spec[:name]      = column.name.inspect
diff --git a/activerecord/lib/active_record/connection_adapters/abstract_mysql_adapter.rb b/activerecord/lib/active_record/connection_adapters/abstract_mysql_adapter.rb
index b260133f4a..f710ec10fc 100644
--- a/activerecord/lib/active_record/connection_adapters/abstract_mysql_adapter.rb
+++ b/activerecord/lib/active_record/connection_adapters/abstract_mysql_adapter.rb
@@ -1,12 +1,14 @@
 require 'active_record/connection_adapters/abstract_adapter'
 require 'active_record/connection_adapters/mysql/schema_creation'
 require 'active_record/connection_adapters/mysql/schema_definitions'
+require 'active_record/connection_adapters/mysql/schema_dumper'
 
 require 'active_support/core_ext/string/strip'
 
 module ActiveRecord
   module ConnectionAdapters
     class AbstractMysqlAdapter < AbstractAdapter
+      include MySQL::ColumnDumper
       include Savepoints
 
       def update_table_definition(table_name, base) # :nodoc:
@@ -17,49 +19,6 @@ module ActiveRecord
         MySQL::SchemaCreation.new(self)
       end
 
-      def column_spec_for_primary_key(column)
-        spec = {}
-        if column.auto_increment?
-          spec[:id] = ':bigint' if column.bigint?
-          spec[:unsigned] = 'true' if column.unsigned?
-          return if spec.empty?
-        else
-          spec[:id] = column.type.inspect
-          spec.merge!(prepare_column_options(column).delete_if { |key, _| [:name, :type, :null].include?(key) })
-        end
-        spec
-      end
-
-      def prepare_column_options(column)
-        spec = super
-        spec[:unsigned] = 'true' if column.unsigned?
-        spec
-      end
-
-      def migration_keys
-        super + [:unsigned]
-      end
-
-      private
-
-      def schema_limit(column)
-        super unless column.type == :boolean
-      end
-
-      def schema_precision(column)
-        super unless /time/ === column.sql_type && column.precision == 0
-      end
-
-      def schema_collation(column)
-        if column.collation && table_name = column.instance_variable_get(:@table_name)
-          @collation_cache ||= {}
-          @collation_cache[table_name] ||= select_one("SHOW TABLE STATUS LIKE '#{table_name}'")["Collation"]
-          column.collation.inspect if column.collation != @collation_cache[table_name]
-        end
-      end
-
-      public
-
       class Column < ConnectionAdapters::Column # :nodoc:
         delegate :strict, :extra, to: :sql_type_metadata, allow_nil: true
 
diff --git a/activerecord/lib/active_record/connection_adapters/mysql/schema_dumper.rb b/activerecord/lib/active_record/connection_adapters/mysql/schema_dumper.rb
new file mode 100644
index 0000000000..6448b8b5e2
--- /dev/null
+++ b/activerecord/lib/active_record/connection_adapters/mysql/schema_dumper.rb
@@ -0,0 +1,48 @@
+module ActiveRecord
+  module ConnectionAdapters
+    module MySQL
+      module ColumnDumper
+        def column_spec_for_primary_key(column)
+          spec = {}
+          if column.auto_increment?
+            spec[:id] = ':bigint' if column.bigint?
+            spec[:unsigned] = 'true' if column.unsigned?
+            return if spec.empty?
+          else
+            spec[:id] = column.type.inspect
+            spec.merge!(prepare_column_options(column).delete_if { |key, _| [:name, :type, :null].include?(key) })
+          end
+          spec
+        end
+
+        def prepare_column_options(column)
+          spec = super
+          spec[:unsigned] = 'true' if column.unsigned?
+          spec
+        end
+
+        def migration_keys
+          super + [:unsigned]
+        end
+
+        private
+
+        def schema_limit(column)
+          super unless column.type == :boolean
+        end
+
+        def schema_precision(column)
+          super unless /time/ === column.sql_type && column.precision == 0
+        end
+
+        def schema_collation(column)
+          if column.collation && table_name = column.instance_variable_get(:@table_name)
+            @table_collation_cache ||= {}
+            @table_collation_cache[table_name] ||= select_one("SHOW TABLE STATUS LIKE '#{table_name}'")["Collation"]
+            column.collation.inspect if column.collation != @table_collation_cache[table_name]
+          end
+        end
+      end
+    end
+  end
+end
diff --git a/activerecord/lib/active_record/connection_adapters/postgresql/schema_dumper.rb b/activerecord/lib/active_record/connection_adapters/postgresql/schema_dumper.rb
new file mode 100644
index 0000000000..a4f0742516
--- /dev/null
+++ b/activerecord/lib/active_record/connection_adapters/postgresql/schema_dumper.rb
@@ -0,0 +1,54 @@
+module ActiveRecord
+  module ConnectionAdapters
+    module PostgreSQL
+      module ColumnDumper
+        def column_spec_for_primary_key(column)
+          spec = {}
+          if column.serial?
+            return unless column.bigint?
+            spec[:id] = ':bigserial'
+          elsif column.type == :uuid
+            spec[:id] = ':uuid'
+            spec[:default] = column.default_function.inspect
+          else
+            spec[:id] = column.type.inspect
+            spec.merge!(prepare_column_options(column).delete_if { |key, _| [:name, :type, :null].include?(key) })
+          end
+          spec
+        end
+
+        # Adds +:array+ option to the default set
+        def prepare_column_options(column)
+          spec = super
+          spec[:array] = 'true' if column.array?
+          spec
+        end
+
+        # Adds +:array+ as a valid migration key
+        def migration_keys
+          super + [:array]
+        end
+
+        private
+
+        def schema_type(column)
+          return super unless column.serial?
+
+          if column.bigint?
+            'bigserial'
+          else
+            'serial'
+          end
+        end
+
+        def schema_default(column)
+          if column.default_function
+            column.default_function.inspect unless column.serial?
+          else
+            super
+          end
+        end
+      end
+    end
+  end
+end
diff --git a/activerecord/lib/active_record/connection_adapters/postgresql_adapter.rb b/activerecord/lib/active_record/connection_adapters/postgresql_adapter.rb
index 25dfda9ef8..8c88c38193 100644
--- a/activerecord/lib/active_record/connection_adapters/postgresql_adapter.rb
+++ b/activerecord/lib/active_record/connection_adapters/postgresql_adapter.rb
@@ -9,6 +9,7 @@ require "active_record/connection_adapters/postgresql/oid"
 require "active_record/connection_adapters/postgresql/quoting"
 require "active_record/connection_adapters/postgresql/referential_integrity"
 require "active_record/connection_adapters/postgresql/schema_definitions"
+require "active_record/connection_adapters/postgresql/schema_dumper"
 require "active_record/connection_adapters/postgresql/schema_statements"
 require "active_record/connection_adapters/postgresql/type_metadata"
 require "active_record/connection_adapters/postgresql/utils"
@@ -117,60 +118,13 @@ module ActiveRecord
       include PostgreSQL::ReferentialIntegrity
       include PostgreSQL::SchemaStatements
       include PostgreSQL::DatabaseStatements
+      include PostgreSQL::ColumnDumper
       include Savepoints
 
       def schema_creation # :nodoc:
         PostgreSQL::SchemaCreation.new self
       end
 
-      def column_spec_for_primary_key(column)
-        spec = {}
-        if column.serial?
-          return unless column.bigint?
-          spec[:id] = ':bigserial'
-        elsif column.type == :uuid
-          spec[:id] = ':uuid'
-          spec[:default] = column.default_function.inspect
-        else
-          spec[:id] = column.type.inspect
-          spec.merge!(prepare_column_options(column).delete_if { |key, _| [:name, :type, :null].include?(key) })
-        end
-        spec
-      end
-
-      # Adds +:array+ option to the default set provided by the
-      # AbstractAdapter
-      def prepare_column_options(column) # :nodoc:
-        spec = super
-        spec[:array] = 'true' if column.array?
-        spec
-      end
-
-      # Adds +:array+ as a valid migration key
-      def migration_keys
-        super + [:array]
-      end
-
-      def schema_type(column)
-        return super unless column.serial?
-
-        if column.bigint?
-          'bigserial'
-        else
-          'serial'
-        end
-      end
-      private :schema_type
-
-      def schema_default(column)
-        if column.default_function
-          column.default_function.inspect unless column.serial?
-        else
-          super
-        end
-      end
-      private :schema_default
-
       # Returns +true+, since this connection adapter supports prepared statement
       # caching.
       def supports_statement_cache?