Improve robustness

models/common.js

@@ -10,6 +10,8 @@ class Model {
     let model = this.getModel();
     let obj = JSON.parse(JSON.stringify(this.record.get({ plain: true })));
     for (let key in obj) {
+      if (!model.tableAttributes[key]) continue;
+
       if (model.tableAttributes[key].type instanceof Sequelize.JSON && typeof obj[key] === 'string') {
         try {
           this[key] = JSON.parse(obj[key]);

models/contest_ranklist.js

@@ -53,6 +53,8 @@ class ContestRanklist extends Model {
 
         for (let i in player.score_details) {
           let judge_state = await JudgeState.fromID(player.score_details[i].judge_id);
+          if (!judge_state) continue;
+
           player.latest = Math.max(player.latest, judge_state.submit_time);
 
           if (player.score_details[i].score != null) {