manage markdowns by path

db/models/Markdown.py

@@ -1,5 +1,5 @@
 #db/models/Markdown.py
-from sqlalchemy import Column, Text, Integer, String, DateTime
+from sqlalchemy import Column, Text, Integer, String, DateTime, ForeignKey
 from db.models import Base
 import datetime
 
@@ -9,7 +9,7 @@ class Markdown(Base):
     title = Column(String(255), nullable=False)
     content = Column(Text, nullable=False)
     created_at = Column(DateTime, default=datetime.datetime.utcnow)
-    path = Column(String(255), nullable=False)
+    path_id = Column(Integer, ForeignKey('path.id'), nullable=False)
 
     def to_dict(self):
         return {
@@ -17,5 +17,5 @@ class Markdown(Base):
             'title': self.title,
             'content': self.content,
             'created_at': self.created_at,
-            'path': self.path,
+            'path_id': self.path_id,
         }

db/models/Path.py

@@ -0,0 +1,17 @@
+#db/models/Path.py
+from sqlalchemy import Column, Text, LargeBinary, String, Integer, ForeignKey, UniqueConstraint
+from db.models import Base
+
+
+class Path(Base):
+    __tablename__ = "path"
+    id = Column(Integer, primary_key=True, autoincrement=True)
+    name = Column(String(50), nullable=False)
+    parent_id = Column(Integer, ForeignKey("path.id"))
+    __table_args__ = (UniqueConstraint("parent_id", "name", name="unique_parent_id_name"), )
+    def to_dict(self):
+        return {
+            "id": self.id,
+            "name": self.name,
+            "parent_id": self.parent_id,
+        }