orm: update with multiple fields

vlib/orm/orm_test.v

@@ -125,6 +125,16 @@ fn test_orm_sqlite() {
 	println(kate2)
 	assert kate2.age == 31
 	assert kate2.name == 'Kate'
+	//
+	sql db {
+		update User set age = 32, name = 'Kate N' where name == 'Kate'
+	}
+	kate3 := sql db {
+		select from User where id == 3
+	}
+	println(kate3)
+	assert kate3.age == 32
+	assert kate3.name == 'Kate N'
 }
 
 struct User {

vlib/v/gen/sql.v

@@ -29,7 +29,7 @@ fn (mut g Gen) sql_stmt(node ast.SqlStmt) {
 		g.write('insert into $node.table_name (')
 	 } else {
 		g.write('update $node.table_name set ')
-		}
+	}
 	if node.kind == .insert {
 		for i, field in node.fields {
 			if field.name == 'id' {
@@ -55,6 +55,9 @@ fn (mut g Gen) sql_stmt(node ast.SqlStmt) {
 		for i, col in node.updated_columns {
 			g.write(' $col = ')
 			g.expr_to_sql(node.update_exprs[i])
+			if i < node.updated_columns.len - 1 {
+				g.write(', ')
+			}
 		}
 		g.write(' where ')
 
@@ -67,6 +70,7 @@ fn (mut g Gen) sql_stmt(node ast.SqlStmt) {
 
 	g.writeln('"));')
 	if node.kind == .insert {
+		// build the object now (`x.name = ... x.id == ...`)
 		for i, field in node.fields {
 			if field.name == 'id' {
 				continue
@@ -79,10 +83,6 @@ fn (mut g Gen) sql_stmt(node ast.SqlStmt) {
 			}
 		}
 	}
-	else  	if node.kind == .update {
-
-		}
-
 	// Dump all sql parameters generated by our custom expr handler
 	binds := g.sql_buf.str()
 	g.sql_buf = strings.new_builder(100)

vlib/v/parser/sql.v

@@ -114,10 +114,18 @@ fn (mut p Parser) sql_stmt() ast.SqlStmt {
 		if n != 'set' {
 			p.error('expecting `set`')
 		}
-		column := p.check_name()
-		updated_columns << column
-		p.check(.assign)
-		update_exprs << p.expr(0)
+		for {
+			column := p.check_name()
+			updated_columns << column
+			p.check(.assign)
+			update_exprs << p.expr(0)
+			if p.tok.kind == .comma {
+				p.check(.comma)
+			}
+			else {
+				break
+			}
+		}
 	}
 	mut table_type := table.Type(0)
 	mut where_expr := ast.Expr{}