feat: refactor User model and add relationships for Note, Subject, and NoteType

app/models.py

@@ -5,9 +5,9 @@ from .extensions import db
 
 
 class User(UserMixin, db.Model):
+    id = db.Column(db.Integer, primary_key=True)
     email = db.Column(db.String(120), unique=True, nullable=False)
     name = db.Column(db.String(100), nullable=False)
-    id = db.Column(db.Integer, primary_key=True)
 
 
 class OAuth(OAuthConsumerMixin, db.Model):
@@ -24,3 +24,39 @@ class OAuth(OAuthConsumerMixin, db.Model):
         User,
         backref=db.backref("oauth_accounts", cascade="all, delete-orphan"),
     )
+
+
+class Subject(db.Model):
+    id = db.Column(db.Integer, primary_key=True)
+    name = db.Column(db.String(100), nullable=False, unique=True)
+
+    notes = db.relationship("Note", back_populates="subject", lazy=True)
+
+
+class NoteType(db.Model):
+    id = db.Column(db.Integer, primary_key=True)
+    name = db.Column(db.String(50), unique=True, nullable=False)
+
+    notes = db.relationship("Note", back_populates="note_type", lazy=True)
+
+
+class Note(db.Model):
+    id = db.Column(db.Integer, primary_key=True)
+
+    title = db.Column(db.String(200), nullable=False)
+    description = db.Column(db.Text, nullable=True)
+
+    link = db.Column(db.String(500), nullable=True)
+    original_link = db.Column(db.String(500), nullable=True)
+
+    note_type_id = db.Column(db.Integer, db.ForeignKey("note_type.id"), nullable=False)
+    subject_id = db.Column(db.Integer, db.ForeignKey("subject.id"), nullable=False)
+    user_id = db.Column(db.Integer, db.ForeignKey("user.id"), nullable=False)
+
+    created_at = db.Column(
+        db.DateTime, nullable=False, default=db.func.current_timestamp()
+    )
+
+    user = db.relationship("User", backref=db.backref("notes", lazy=True))
+    subject = db.relationship("Subject", back_populates="notes")
+    note_type = db.relationship("NoteType", back_populates="notes")