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调试信息： SELECT id,category FROM {course} WHERE id IS NULL
[array (
)]
Error code: invalidrecord
[array (
)]
Error code: invalidrecord
堆栈跟踪：
- line 1653 of /public/lib/dml/moodle_database.php: dml_missing_record_exception thrown
- line 1629 of /public/lib/dml/moodle_database.php: call to moodle_database->get_record_select()
- line 200 of /public/lib/classes/context/course.php: call to moodle_database->get_record()
- line 195 of /public/local/coursecomplex/lib.php: call to core\context\course::instance()
- line 990 of /public/local/coursecomplex/lib.php: call to lcc_get_product_image()
- line 146 of /public/local/coursecomplex/cart.php: call to lcc_get_cartpage_items_html()