'vlib/orm/orm_create_and_drop_test.v',
         'vlib/orm/orm_insert_test.v',
         'vlib/orm/orm_fn_calls_test.v',
+        'vlib/orm/orm_last_id_test.v',
         'vlib/orm/orm_string_interpolation_in_where_test.v',
         'vlib/db/sqlite/sqlite_test.v',
         'vlib/db/sqlite/sqlite_orm_test.v',
         'vlib/orm/orm_create_and_drop_test.v',
         'vlib/orm/orm_insert_test.v',
         'vlib/orm/orm_fn_calls_test.v',
+        'vlib/orm/orm_last_id_test.v',
         'vlib/orm/orm_string_interpolation_in_where_test.v',
         'vlib/v/tests/orm_sub_struct_test.v',
         'vlib/v/tests/orm_sub_array_struct_test.v',

 }
 
 // last_id is used internally by V's ORM for post-processing `INSERT ` queries
-pub fn (db Connection) last_id() orm.Primitive {
+pub fn (db Connection) last_id() int {
     query := 'SELECT last_insert_id();'
-    id := db.query(query) or {
-        Result{
-            result: 0
-        }
-    }
-    return orm.Primitive(id.rows()[0].vals[0].int())
+    id := db.query(query) or { return 0 }
+
+    return id.rows()[0].vals[0].int()
 }
 
 // DDL (table creation/destroying etc)

 }
 
 // last_id is used internally by V's ORM for post-processing `INSERT ` queries
-pub fn (db DB) last_id() orm.Primitive {
+pub fn (db DB) last_id() int {
     query := 'SELECT LASTVAL();'
-    id := db.q_int(query) or { 0 }
-    return orm.Primitive(id)
+
+    return db.q_int(query) or { 0 }
 }
 
 // DDL (table creation/destroying etc)

 }
 
 // last_id is used internally by V's ORM for post-processing `INSERT ` queries
-pub fn (db DB) last_id() orm.Primitive {
+pub fn (db DB) last_id() int {
     query := 'SELECT last_insert_rowid();'
-    id := db.q_int(query)
-    return orm.Primitive(id)
+
+    return db.q_int(query)
 }
 
 // DDL (table creation/destroying etc)

     mysql_stmt_worker(db, query, orm.QueryData{}, where)!
 }
 
-pub fn (db Connection) last_id() orm.Primitive {
+pub fn (db Connection) last_id() int {
     query := 'SELECT last_insert_id();'
-    id := db.query(query) or {
-        Result{
-            result: 0
-        }
-    }
+    id := db.query(query) or { return 0 }
+
     return orm.Primitive(id.rows()[0].vals[0].int())
 }
 

     delete(table string, where QueryData) !
     create(table string, fields []TableField) !
     drop(table string) !
-    last_id() Primitive
+    last_id() int
 }
 
 // Generates an sql stmt, from universal parameter

new file mode 100644
+import db.sqlite
+
+struct User {
+    id   int    [primary; sql: serial]
+    name string
+}
+
+fn test_last_id() {
+    mut db := sqlite.connect(':memory:') or { panic(err) }
+
+    sql db {
+        create table User
+    }
+
+    first_user := User{
+        name: 'first'
+    }
+
+    second_user := User{
+        name: 'second'
+    }
+
+    sql db {
+        insert first_user into User
+        insert second_user into User
+    }
+
+    last_id := db.last_id()
+
+    assert typeof(last_id).name == 'int'
+    assert last_id > 0
+}

     pg_stmt_worker(db, query, orm.QueryData{}, where)!
 }
 
-pub fn (db DB) last_id() orm.Primitive {
+pub fn (db DB) last_id() int {
     query := 'SELECT LASTVAL();'
-    id := db.q_int(query) or { 0 }
-    return orm.Primitive(id)
+
+    return db.q_int(query) or { 0 }
 }
 
 // table

     sqlite_stmt_worker(db, query, orm.QueryData{}, where)!
 }
 
-pub fn (db DB) last_id() orm.Primitive {
+pub fn (db DB) last_id() int {
     query := 'SELECT last_insert_rowid();'
-    id := db.q_int(query)
-    return orm.Primitive(id)
+
+    return db.q_int(query)
 }
 
 // table

 
     for sub in subs {
         g.sql_stmt_line(sub, expr, or_expr)
-        g.writeln('array_push(&${last_ids_arr}, _MOV((orm__Primitive[]){orm__Connection_name_table[${expr}._typ]._method_last_id(${expr}._object)}));')
+        g.writeln('array_push(&${last_ids_arr}, _MOV((orm__Primitive[]){orm__int_to_primitive(orm__Connection_name_table[${expr}._typ]._method_last_id(${expr}._object))}));')
     }
 
     g.write('${result_name}_void ${res} = orm__Connection_name_table[${expr}._typ]._method_')
 
     if arrs.len > 0 {
         mut id_name := g.new_tmp_var()
-        g.writeln('orm__Primitive ${id_name} = orm__Connection_name_table[${expr}._typ]._method_last_id(${expr}._object);')
+        g.writeln('orm__Primitive ${id_name} = orm__int_to_primitive(orm__Connection_name_table[${expr}._typ]._method_last_id(${expr}._object));')
         for i, mut arr in arrs {
             idx := g.new_tmp_var()
             g.writeln('for (int ${idx} = 0; ${idx} < ${arr.object_var_name}.${field_names[i]}.len; ${idx}++) {')