Add FoodLog model and update relationships

Introduces the FoodLog model to track user food consumption, adds relationships between User, FoodItem, and FoodLog, and updates seed.py to include sample FoodLog data. Also fixes route redirection to use the correct blueprint namespace.

models.py

@@ -3,6 +3,7 @@ from werkzeug.security import generate_password_hash, check_password_hash
 from application import db
 from typing import Optional
 from forms import FoodItemForm
+from datetime import datetime, timezone
 
 
 class User(UserMixin, db.Model):
@@ -12,7 +13,8 @@ class User(UserMixin, db.Model):
     password = db.Column(db.String, nullable=False)
     is_admin = db.Column(db.Boolean, nullable=False, default=False)
 
-    food_items = db.relationship("FoodItem", lazy="dynamic")
+    food_items = db.relationship("FoodItem", lazy="dynamic", backref="user")
+    food_logs = db.relationship("FoodLog", lazy="dynamic", backref="user")
 
     def __init__(
         self, username: str, password: str, is_admin: bool = False
@@ -50,6 +52,8 @@ class FoodItem(db.Model):
     fat_100 = db.Column(db.Float, nullable=False)
     saturated_fat_100 = db.Column(db.Float)
 
+    food_logs = db.relationship("FoodLog", backref="food_item", lazy="dynamic")
+
     __table_args__ = (
         db.UniqueConstraint("barcode", "owner_id", name="barcode_owner_key"),
     )
@@ -98,3 +102,22 @@ class FoodItem(db.Model):
             "fat_100": self.fat_100,
             "saturated_fat_100": self.saturated_fat_100,
         }
+
+
+class FoodLog(db.Model):
+    __tablename__ = "food_log"
+    id = db.Column(db.Integer, primary_key=True)
+    datetime = db.Column(
+        db.DateTime, default=datetime.now(timezone.utc), nullable=False
+    )
+    food_item_id = db.Column(
+        db.Integer, db.ForeignKey("food_item.id"), nullable=False
+    )
+    user_id = db.Column(db.Integer, db.ForeignKey("user.id"), nullable=False)
+    amount = db.Column(db.Integer, nullable=False)
+
+    def __init__(self, food_item_id: int, user_id: int, amount: int):
+        super().__init__()
+        self.food_item_id = food_item_id
+        self.user_id = user_id
+        self.amount = amount