Submission entity added to database

backend/src/entities/assigments/submission.entity.ts

@@ -0,0 +1,22 @@
+import {Student} from "../users/student.entity";
+import {Group} from "./group.entity";
+import {Entity, Enum, ManyToOne, PrimaryKey} from "@mikro-orm/core";
+import {Language} from "../content/language";
+
+@Entity()
+export class Submission {
+    @ManyToOne({entity: () => Student, primary: true})
+    submitter!: Student;
+
+    @ManyToOne({entity: () => Group, primary: true})
+    onBehalfOf!: Group;
+
+    @PrimaryKey({type: "string"})
+    hruid!: string;
+
+    @Enum({items: () => Language, primary: true})
+    language!: Language;
+
+    @PrimaryKey({type: "string"})
+    version: number = "1";
+}