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[rails.git] / lib / migrate.rb

diff --git a/lib/migrate.rb b/lib/migrate.rb
index 38f8db6b3e28cd40e16e78a46088d7c24264c539..7549add2abfb7e5623a23dbd26f8981c0e4ab6a2 100644 (file)
--- a/lib/migrate.rb
+++ b/lib/migrate.rb
@@ -17,8 +17,13 @@ module ActiveRecord
 
       def add_foreign_key(table_name, column_name, reftbl, refcol = nil)
         execute "ALTER TABLE #{table_name} ADD " +
-         "FOREIGN KEY (#{quote_column_names(column_name)}) " +
-         "REFERENCES #{reftbl} (#{quote_column_names(refcol || column_name)})"
+          "FOREIGN KEY (#{quote_column_names(column_name)}) " +
+          "REFERENCES #{reftbl} (#{quote_column_names(refcol || column_name)})"
+      end
+
+      def remove_foreign_key(table_name, column_name, reftbl, refcol = nil)
+        execute "ALTER TABLE #{table_name} DROP " +
+          "CONSTRAINT #{table_name}_#{column_name[0]}_fkey"
       end
 
       alias_method :old_options_include_default?, :options_include_default?
@@ -37,58 +42,88 @@ module ActiveRecord
       end
     end
 
-    class MysqlAdapter
+    class PostgreSQLAdapter
       alias_method :old_native_database_types, :native_database_types
 
       def native_database_types
         types = old_native_database_types
-        types[:bigint] = { :name => "bigint", :limit => 20 }
-        types[:double] = { :name => "double" }
-        types[:bigint_pk] = { :name => "bigint(20) DEFAULT NULL auto_increment PRIMARY KEY" }
-        types[:bigint_pk_64] = { :name => "bigint(64) DEFAULT NULL auto_increment PRIMARY KEY" }
-        types[:bigint_auto_64] = { :name => "bigint(64) DEFAULT NULL auto_increment" }
-        types[:bigint_auto_11] = { :name => "bigint(11) DEFAULT NULL auto_increment" }
-        types[:bigint_auto_20] = { :name => "bigint(20) DEFAULT NULL auto_increment" }
-        types[:four_byte_unsigned] = { :name=> "integer unsigned NOT NULL" }
-        types
-      end
-
-      def change_column(table_name, column_name, type, options = {})
-        unless options_include_default?(options)
-          options[:default] = select_one("SHOW COLUMNS FROM #{table_name} LIKE '#{column_name}'")["Default"]
-
-          unless type == :string or type == :text
-            options.delete(:default) if options[:default] = "";
-          end
+        types[:double] = { :name => "double precision" }
+        types[:integer_pk] = { :name => "serial PRIMARY KEY" }
+        types[:bigint_pk] = { :name => "bigserial PRIMARY KEY" }
+        types[:bigint_pk_64] = { :name => "bigserial PRIMARY KEY" }
+        types[:bigint_auto_64] = { :name => "bigint" } #fixme: need autoincrement?
+        types[:bigint_auto_11] = { :name => "bigint" } #fixme: need autoincrement?
+        types[:bigint_auto_20] = { :name => "bigint" } #fixme: need autoincrement?
+        types[:four_byte_unsigned] = { :name => "bigint" } # meh
+        types[:inet] = { :name=> "inet" }
+
+        enumerations.each_key do |e|
+          types[e.to_sym]= { :name => e }
         end
 
-        change_column_sql = "ALTER TABLE #{table_name} CHANGE #{column_name} #{column_name} #{type_to_sql(type, options[:limit], options[:precision], options[:scale])}"
-        add_column_options!(change_column_sql, options)
-        execute(change_column_sql) 
+        types
       end
 
       def myisam_table
-        return { :id => false, :force => true, :options => "ENGINE=MyIsam" }
+        return { :id => false, :force => true, :options => ""}
       end
 
       def innodb_table
-        return { :id => false, :force => true, :options => "ENGINE=InnoDB" }
+        return { :id => false, :force => true, :options => ""}
       end
 
       def innodb_option
-        return "ENGINE=InnoDB"
+        return ""
       end
- 
+
       def change_engine (table_name, engine)
-        execute "ALTER TABLE #{table_name} ENGINE = #{engine}"
       end
 
       def add_fulltext_index (table_name, column)
-        execute "CREATE FULLTEXT INDEX `#{table_name}_#{column}_idx` ON `#{table_name}` (`#{column}`)"
+        execute "CREATE INDEX #{table_name}_#{column}_idx on #{table_name} (#{column})"
+      end
+
+      def enumerations
+        @enumerations ||= Hash.new
+      end
+
+      def create_enumeration (enumeration_name, values)
+        enumerations[enumeration_name] = values
+        execute "create type #{enumeration_name} as enum ('#{values.join '\',\''}')"
       end
 
-      def alter_column_nwr_enum (table_name, column)
-        execute "alter table #{table_name} change column #{column} #{column} enum('node','way','relation');"
+      def drop_enumeration (enumeration_name)
+        execute "drop type #{enumeration_name}"
+        enumerations.delete(enumeration_name)
+      end
+
+      def alter_primary_key(table_name, new_columns)
+        execute "alter table #{table_name} drop constraint #{table_name}_pkey; alter table #{table_name} add primary key (#{new_columns.join(',')})"
+      end
+
+      def interval_constant(interval)
+        "'#{interval}'::interval"
+      end
+
+      def add_index(table_name, column_name, options = {})
+        column_names = Array(column_name)
+        index_name   = index_name(table_name, :column => column_names)
+
+        if Hash === options # legacy support, since this param was a string
+          index_type = options[:unique] ? "UNIQUE" : ""
+          index_name = options[:name] || index_name
+          index_method = options[:method] || "BTREE"
+        else
+          index_type = options
+        end
+
+        quoted_column_names = column_names.map { |e| quote_column_name(e) }
+        if Hash === options and options[:lowercase]
+          quoted_column_names = quoted_column_names.map { |e| "LOWER(#{e})" }
+        end
+        quoted_column_names = quoted_column_names.join(", ")
+
+        execute "CREATE #{index_type} INDEX #{quote_column_name(index_name)} ON #{quote_table_name(table_name)} USING #{index_method} (#{quoted_column_names})"
       end
     end
   end