Merge pull request #1410 from lucasts/pg_schema

a little step to better postgresql schema support in rails

activerecord/lib/active_record/connection_adapters/postgresql_adapter.rb

@@ -659,7 +659,10 @@ def drop_database(name) #:nodoc:
       # Returns the list of all tables in the schema search path or a specified schema.
       def tables(name = nil)
         query(<<-SQL, 'SCHEMA').map { |row| row[0] }
-          SELECT tablename
+          SELECT  case schemaname 
+                    when 'public' then tablename 
+                    else schemaname||'.'||tablename 
+                  end as tablename
           FROM pg_tables
           WHERE schemaname = ANY (current_schemas(false))
         SQL
@@ -805,8 +808,8 @@ def reset_pk_sequence!(table, pk = nil, sequence = nil) #:nodoc:
         end
 
         if pk && sequence
-          quoted_sequence = quote_column_name(sequence)
-
+          quoted_sequence = quote_table_name(sequence)
+          
           select_value <<-end_sql, 'Reset sequence'
             SELECT setval('#{quoted_sequence}', (SELECT COALESCE(MAX(#{quote_column_name pk})+(SELECT increment_by FROM #{quoted_sequence}), (SELECT min_value FROM #{quoted_sequence})) FROM #{quote_table_name(table)}), false)
           end_sql
@@ -818,18 +821,21 @@ def pk_and_sequence_for(table) #:nodoc:
         # First try looking for a sequence with a dependency on the
         # given table's primary key.
         result = exec_query(<<-end_sql, 'SCHEMA').rows.first
-          SELECT attr.attname, seq.relname
+          SELECT attr.attname, ns.nspname, seq.relname
           FROM pg_class seq
           INNER JOIN pg_depend dep ON seq.oid = dep.objid
           INNER JOIN pg_attribute attr ON attr.attrelid = dep.refobjid AND attr.attnum = dep.refobjsubid
           INNER JOIN pg_constraint cons ON attr.attrelid = cons.conrelid AND attr.attnum = cons.conkey[1]
+          INNER JOIN pg_namespace ns ON seq.relnamespace = ns.oid
           WHERE seq.relkind  = 'S'
             AND cons.contype = 'p'
             AND dep.refobjid = '#{quote_table_name(table)}'::regclass
         end_sql
 
         # [primary_key, sequence]
-        [result.first, result.last]
+        sequence = result.second ==  'public' ?  result.last : "#{result.second}.#{result.last}"
+
+        [result.first, sequence]
       rescue
         nil
       end