generateReport add cat_id check

app/service/course/v5/report.js

@@ -52,6 +52,12 @@ class ReportService extends Service {
     const { ctx } = this;
     const data = eval(input.data);
 
+    // 校验cat_id
+    const category = await ctx.classModel.V5.CourseV5Category.findOne({ where: { id: input.cat_id } });
+    if (ctx.isEmpty(category) || category.type !== 3) {
+      ctx.failed('cat_id error');
+    }
+
     let answerIds = [];
     for (const v of data) {
       answerIds = _.concat(answerIds, v.answers);