Fix CE submissions' score is NULL

models/common.ts

@@ -86,7 +86,10 @@ export default class Model extends TypeORM.BaseEntity {
     }
   }
 
+  async saveHook(): Promise<void> {}
+
   async save(): Promise<this> {
+    await this.saveHook();
     await super.save();
     if ((this.constructor as typeof Model).cache) {
       cacheSet(this.constructor.name, (this as any).id, this);

models/judge_state.ts

@@ -114,6 +114,10 @@ export default class JudgeState extends Model {
     }
   }
 
+  async saveHook() {
+    if (this.score === null) this.score = 0;
+  }
+
   async isAllowedVisitBy(user) {
     await this.loadRelationships();