X-Git-Url: https://git.openstreetmap.org./rails.git/blobdiff_plain/08bd1688ee10b0eb9b474c235f92e6ea17365fa0..e825f8b2647fb1bc62fb017149930b94ec4d4ea2:/lib/migrate.rb

diff --git a/lib/migrate.rb b/lib/migrate.rb
index 488c6d3d2..7c14333b3 100644
--- 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?
@@ -37,118 +42,100 @@ module ActiveRecord
       end
     end
 
-    class MysqlAdapter
-      if MysqlAdapter.public_instance_methods(false).include?('native_database_types')
-        alias_method :old_native_database_types, :native_database_types
-      end
+    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[:integer_pk] = { :name => "integer DEFAULT NULL auto_increment PRIMARY KEY" }
-        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" }
-        types[:inet] = { :name=> "integer unsigned" }
-        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"]
+        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" }
 
-          unless type == :string or type == :text
-            options.delete(:default) if options[:default] = "";
-          end
+        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 alter_column_nwr_enum (table_name, column)
-        execute "alter table #{table_name} change column #{column} #{column} enum('Node','Way','Relation');"
+      def enumerations
+        @enumerations ||= Hash.new
       end
 
-      def alter_primary_key(table_name, new_columns)
-        execute("alter table #{table_name} drop primary key, add primary key (#{new_columns.join(',')})")
+      def create_enumeration(enumeration_name, values)
+        enumerations[enumeration_name] = values
+        execute "CREATE TYPE #{enumeration_name} AS ENUM ('#{values.join '\',\''}')"
       end
-    end
 
-    class PostgreSQLAdapter
-      if PostgreSQLAdapter.public_instance_methods(false).include?('native_database_types')
-        alias_method :old_native_database_types, :native_database_types
+      def drop_enumeration(enumeration_name)
+        execute "DROP TYPE #{enumeration_name}"
+        enumerations.delete(enumeration_name)
       end
 
-      def native_database_types
-        types = old_native_database_types
-        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" }
-        types
+      def rename_enumeration(old_name, new_name)
+        execute "ALTER TYPE #{quote_table_name(old_name)} RENAME TO #{quote_table_name(new_name)}"
       end
 
-      def myisam_table
-        return { :id => false, :force => true, :options => ""}
-      end
-
-      def innodb_table
-        return { :id => false, :force => true, :options => ""}
+      def alter_primary_key(table_name, new_columns)
+        execute "ALTER TABLE #{table_name} DROP CONSTRAINT #{table_name}_pkey"
+        execute "ALTER TABLE #{table_name} ADD PRIMARY KEY (#{new_columns.join(',')})"
       end
 
-      def innodb_option
-        return ""
-      end
- 
-      def change_engine (table_name, engine)
+      def interval_constant(interval)
+        "'#{interval}'::interval"
       end
 
-      def add_fulltext_index (table_name, column)
-        execute "CREATE INDEX #{table_name}_#{column}_idx on #{table_name} (#{column})"
-      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
 
-      def alter_column_nwr_enum (table_name, column)
-        response = select_one("select count(*) as count from pg_type where typname = 'nwr_enum'")
-        if response['count'] == "0" #yep, as a string
-          execute "create type nwr_enum as ENUM ('Node', 'Way', 'Relation')"
+        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
-        execute	"alter table #{table_name} drop #{column}"
-        execute "alter table #{table_name} add #{column} nwr_enum"
+        if Hash === options and options[:columns]
+          quoted_column_names = quoted_column_names + Array[options[:columns]]
+        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
 
-      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(',')})"
+      def rename_index(table_name, old_name, new_name)
+        execute "ALTER INDEX #{quote_table_name(old_name)} RENAME TO #{quote_table_name(new_name)}"
       end
     end
   end