fix bug

apps/exams/Lib/Model/ExamsPaperModel.class.php

@@ -73,7 +73,9 @@ class ExamsPaperModel extends Model
                 $data[$key]['exams_module_title']     = $this->getModuleTitleAttr($v['exams_module_id']);
                 $data[$key]['exams_module_title']     = $this->getModuleTitleAttr($v['exams_module_id']);
                 $data[$key]['level_title']            = $this->getLevelTitle($v['level']);
                 $data[$key]['level_title']            = $this->getLevelTitle($v['level']);
                 $data[$key]['is_buy'] = $this->isBuy($v['exams_paper_id'], $this->mid);
                 $data[$key]['is_buy'] = $this->isBuy($v['exams_paper_id'], $this->mid);
+                if ($data[$key]['is_buy'] || $v['price'] == 0) {
                     $data[$key]['attachment'] = $this->getAttachPathByAttachId($v['attachment']);
                     $data[$key]['attachment'] = $this->getAttachPathByAttachId($v['attachment']);
+                }
                 // 判断自动组卷(1)和手动组卷
                 // 判断自动组卷(1)和手动组卷
                 if ($v['assembly_type'] == 1) {
                 if ($v['assembly_type'] == 1) {
                     $paper_options = unserialize($v['paper_options']);
                     $paper_options = unserialize($v['paper_options']);