tutorials: blog: use db.create_table()

tutorials/building_a_simple_web_blog_with_vweb/code/blog/blog.v

@@ -33,8 +33,11 @@ pub fn (app &App) index() vweb.Result {
 
 pub fn (mut app App) init_once() {
 	app.db = sqlite.connect('blog.db') or { panic(err) }
-	app.db.exec('create table if not exists article (' + 'id integer primary key, ' +
+	app.db.create_table('article', [
-		"title text default ''," + "text text default ''" + ');')
+		'id integer primary key',
+		"title text default ''",
+		"text text default ''",
+	])
 }
 
 pub fn (mut app App) init() {

vlib/sqlite/sqlite.v

@@ -36,21 +36,21 @@ pub mut:
 }
 
 //
-fn C.sqlite3_open(charptr, &&C.sqlite3) int
+fn C.sqlite3_open(&char, &&C.sqlite3) int
 
 fn C.sqlite3_close(&C.sqlite3) int
 
 //
-fn C.sqlite3_prepare_v2(&C.sqlite3, charptr, int, &&C.sqlite3_stmt, &charptr) int
+fn C.sqlite3_prepare_v2(&C.sqlite3, &char, int, &&C.sqlite3_stmt, &&char) int
 
 fn C.sqlite3_step(&C.sqlite3_stmt) int
 
 fn C.sqlite3_finalize(&C.sqlite3_stmt) int
 
 //
-fn C.sqlite3_column_name(&C.sqlite3_stmt, int) charptr
+fn C.sqlite3_column_name(&C.sqlite3_stmt, int) &char
 
-fn C.sqlite3_column_text(&C.sqlite3_stmt, int) byteptr
+fn C.sqlite3_column_text(&C.sqlite3_stmt, int) &byte
 
 fn C.sqlite3_column_int(&C.sqlite3_stmt, int) int
 
@@ -61,7 +61,7 @@ fn C.sqlite3_column_double(&C.sqlite3_stmt, int) f64
 fn C.sqlite3_column_count(&C.sqlite3_stmt) int
 
 //
-fn C.sqlite3_errstr(int) charptr
+fn C.sqlite3_errstr(int) &char
 
 fn C.sqlite3_free(voidptr)
 
@@ -180,5 +180,5 @@ pub fn (db DB) insert<T>(x T) {
 }
 
 pub fn (db DB) create_table(table_name string, columns []string) {
-	db.exec('create table $table_name (' + columns.join(',\n') + ')')
+	db.exec('create table if not exists $table_name (' + columns.join(',\n') + ')')
 }

vlib/v/tests/valgrind/1.strings_and_arrays.v

@@ -380,7 +380,7 @@ fn main() {
 	str_tmp_expr_advanced_var_decl()
 	str_inter()
 	match_expr()
-	// optional_str()
+	optional_str()
 	// optional_return()
 	str_replace()
 	str_replace2()