refactor(db): streamline model imports and remove unused model exports

- Removed the export of models from the database connection module to simplify the structure.
- Updated various files to import models directly from the new centralized models module.
- Ensured consistency across the codebase by replacing mongoose model references with the new import paths.

api/server/controllers/AuthController.js

@@ -13,8 +13,8 @@ const {
 const { getOpenIdConfig } = require('~/strategies');
 const { isEnabled } = require('~/server/utils');
 
-const Session = mongoose.models.Session;
-const User = mongoose.models.User;
+const Session = require('~/db/models').Session;
+const User = require('~/db/models').User;
 
 const registrationController = async (req, res) => {
   try {

api/server/controllers/Balance.js

@@ -1,6 +1,6 @@
 const mongoose = require('mongoose');
 
-const Balance = mongoose.models.Balance;
+const Balance = require('~/db/models').Balance;
 
 async function balanceController(req, res) {
   const balanceData = await Balance.findOne(

api/server/controllers/TwoFactorController.js

@@ -10,7 +10,7 @@ const {
 const { encryptV3 } = require('~/server/utils/crypto');
 const safeAppTitle = (process.env.APP_TITLE || 'LibreChat').replace(/\s+/g, '');
 
-const User = mongoose.models.User;
+const User = require('~/db/models').User;
 
 /**
  * Enable 2FA for the user by generating a new TOTP secret and backup codes.

api/server/controllers/UserController.js

@@ -15,10 +15,10 @@ const { processDeleteRequest } = require('~/server/services/Files/process');
 const { deleteAllSharedLinks } = require('~/models/Share');
 const { deleteToolCalls } = require('~/models/ToolCall');
 
-const Transaction = mongoose.models.Transaction;
-const Session = mongoose.models.Session;
-const Balance = mongoose.models.Balance;
-const User = mongoose.models.User;
+const Transaction = require('~/db/models').Transaction;
+const Session = require('~/db/models').Session;
+const Balance = require('~/db/models').Balance;
+const User = require('~/db/models').User;
 
 const getUserController = async (req, res) => {
   /** @type {MongoUser} */

api/server/controllers/auth/TwoFactorAuthController.js

@@ -8,7 +8,7 @@ const {
 const { setAuthTokens } = require('~/server/services/AuthService');
 const { logger } = require('@librechat/data-schemas');
 
-const User = mongoose.models.User;
+const User = require('~/db/models').User;
 
 /**
  * Verifies the 2FA code during login using a temporary token.

api/server/index.js

@@ -9,8 +9,9 @@ const passport = require('passport');
 const mongoSanitize = require('express-mongo-sanitize');
 const fs = require('fs');
 const cookieParser = require('cookie-parser');
+const { connectDb, indexSync } = require('~/db');
+
 const { jwtLogin, passportLogin } = require('~/strategies');
-const { connectDb, indexSync, getModels } = require('db');
 const { isEnabled } = require('~/server/utils');
 const { ldapLogin } = require('~/strategies');
 const { logger } = require('~/config');

api/server/middleware/checkBan.js

@@ -8,7 +8,7 @@ const keyvMongo = require('~/cache/keyvMongo');
 const denyRequest = require('./denyRequest');
 const { getLogStores } = require('~/cache');
 
-const User = mongoose.models.User;
+const User = require('~/db/models').User;
 
 const banCache = new Keyv({ store: keyvMongo, namespace: ViolationTypes.BAN, ttl: 0 });
 const message = 'Your account has been temporarily banned due to violations of our service.';

api/server/middleware/setBalanceConfig.js

@@ -2,7 +2,7 @@ const mongoose = require('mongoose');
 const { logger } = require('@librechat/data-schemas');
 const { getBalanceConfig } = require('~/server/services/Config');
 
-const Balance = mongoose.models.Balance;
+const Balance = require('~/db/models').Balance;
 
 /**
  * Middleware to synchronize user balance settings with current balance configuration.

api/server/routes/messages.js

@@ -16,7 +16,7 @@ const { cleanUpPrimaryKeyValue } = require('~/lib/utils/misc');
 const { getConvosQueried } = require('~/models/Conversation');
 const { countTokens } = require('~/server/utils');
 
-const Message = mongoose.models.Message;
+const Message = require('~/db/models').Message;
 
 const router = express.Router();
 router.use(requireJwtAuth);

api/server/services/PluginService.js

@@ -2,7 +2,7 @@ const mongoose = require('mongoose');
 const { encrypt, decrypt } = require('~/server/utils/');
 const { logger } = require('~/config');
 
-const PluginAuth = mongoose.models.PluginAuth;
+const PluginAuth = require('~/db/models').PluginAuth;
 
 /**
  * Asynchronously retrieves and decrypts the authentication value for a user's plugin, based on a specified authentication field.

api/server/services/UserService.js

@@ -4,7 +4,7 @@ const { ErrorTypes } = require('librechat-data-provider');
 const { encrypt, decrypt } = require('~/server/utils/crypto');
 const { updateUser } = require('~/models');
 
-const Key = mongoose.models.Key;
+const Key = require('~/db/models').Key;
 
 /**
  * Updates the plugins for a user based on the action specified (install/uninstall).

api/server/services/twoFactorService.js

@@ -2,7 +2,7 @@ const mongoose = require('mongoose');
 const { webcrypto } = require('node:crypto');
 const { hashBackupCode, decryptV3, decryptV2 } = require('~/server/utils/crypto');
 
-const User = mongoose.models.User;
+const User = require('~/db/models').User;
 
 // Base32 alphabet for TOTP secret encoding.
 const BASE32_ALPHABET = 'ABCDEFGHIJKLMNOPQRSTUVWXYZ234567';