import models to init

app/__init__.py

@@ -32,10 +32,15 @@ def create_app():
         app.wsgi_app, x_for=1, x_proto=1
     )
     
-    from app.users.models import User
+    import app.users.models as user_models
+    import app.campaigns.models as campaign_models
+    import app.main.models as main_models
+    
+
+
     @login_manager.user_loader
     def load_user(user_id):
-        user = User.query.get(user_id)
+        user = user_models.User.query.get(user_id)
         if user:
             return user
         else:

app/main/models.py

@@ -11,5 +11,5 @@ class Donation(db.Model):
     id            = Column('id', INTEGER(), primary_key=True, autoincrement=True)
     currency_type = Column('currency_type', TEXT(), nullable=False)
     amount        = Column('amount', INTEGER(), nullable=False)
-    campaign      = db.relationship('Campaign', backref='Donation', lazy='dynamic')
-    user          = db.relationship('User', backref='Donation', lazy='dynamic')
+    campaign      = db.relationship('campaign', backref='donation', lazy='dynamic')
+    user          = db.relationship('user', backref='donation', lazy='dynamic')