refactor(auth-token): lazy-load relations

Signed-off-by: David Mehren <git@herrmehren.de>

src/auth/auth-token.entity.ts

@@ -24,7 +24,7 @@ export class AuthToken {
   @ManyToOne((_) => User, (user) => user.authTokens, {
     onDelete: 'CASCADE', // This deletes the AuthToken, when the associated User is deleted
   })
-  user: User;
+  user: Promise<User>;
 
   @Column()
   label: string;
@@ -53,7 +53,7 @@ export class AuthToken {
   ): Omit<AuthToken, 'id' | 'createdAt'> {
     const newToken = new AuthToken();
     newToken.keyId = keyId;
-    newToken.user = user;
+    newToken.user = Promise.resolve(user);
     newToken.label = label;
     newToken.accessTokenHash = accessToken;
     newToken.validUntil = validUntil;

src/auth/auth.service.spec.ts

@@ -89,7 +89,7 @@ describe('AuthService', () => {
       const accessTokenHash = await hashPassword(token);
       jest.spyOn(authTokenRepo, 'findOne').mockResolvedValueOnce({
         ...authToken,
-        user: user,
+        user: Promise.resolve(user),
         accessTokenHash: accessTokenHash,
       });
       const authTokenFromCall = await service.getAuthTokenAndValidate(
@@ -98,7 +98,7 @@ describe('AuthService', () => {
       );
       expect(authTokenFromCall).toEqual({
         ...authToken,
-        user: user,
+        user: Promise.resolve(user),
         accessTokenHash: accessTokenHash,
       });
     });
@@ -112,7 +112,7 @@ describe('AuthService', () => {
       it('AuthToken has wrong hash', async () => {
         jest.spyOn(authTokenRepo, 'findOne').mockResolvedValueOnce({
           ...authToken,
-          user: user,
+          user: Promise.resolve(user),
           accessTokenHash: 'the wrong hash',
         });
         await expect(
@@ -123,7 +123,7 @@ describe('AuthService', () => {
         const accessTokenHash = await hashPassword(token);
         jest.spyOn(authTokenRepo, 'findOne').mockResolvedValueOnce({
           ...authToken,
-          user: user,
+          user: Promise.resolve(user),
           accessTokenHash: accessTokenHash,
           validUntil: new Date(1549312452000),
         });
@@ -138,7 +138,7 @@ describe('AuthService', () => {
     it('works', async () => {
       jest.spyOn(authTokenRepo, 'findOne').mockResolvedValueOnce({
         ...authToken,
-        user: user,
+        user: Promise.resolve(user),
         lastUsed: new Date(1549312452000),
       });
       jest
@@ -170,7 +170,7 @@ describe('AuthService', () => {
       });
       jest.spyOn(authTokenRepo, 'findOne').mockResolvedValue({
         ...authToken,
-        user: user,
+        user: Promise.resolve(user),
         accessTokenHash: accessTokenHash,
       });
       jest
@@ -204,14 +204,14 @@ describe('AuthService', () => {
     it('works', async () => {
       jest.spyOn(authTokenRepo, 'findOne').mockResolvedValue({
         ...authToken,
-        user: user,
+        user: Promise.resolve(user),
       });
       jest
         .spyOn(authTokenRepo, 'remove')
         .mockImplementationOnce(async (token, __): Promise<AuthToken> => {
           expect(token).toEqual({
             ...authToken,
-            user: user,
+            user: Promise.resolve(user),
           });
           return authToken;
         });

src/auth/auth.service.ts

@@ -53,7 +53,11 @@ export class AuthService {
     }
     const accessToken = await this.getAuthTokenAndValidate(keyId, secret);
     await this.setLastUsedToken(keyId);
-    return await this.usersService.getUserByUsername(accessToken.user.username);
+    return await this.usersService.getUserByUsername(
+      (
+        await accessToken.user
+      ).username,
+    );
   }
 
   async createTokenForUser(