fix render issue

db/models/Resource.py

@@ -1,10 +1,10 @@
 #db/models/Resource.py
-from sqlalchemy import Column, Text, LargeBinary
+from sqlalchemy import Column, Text, LargeBinary, String
 from db.models import Base
 
 class Resource(Base):
     __tablename__ = 'resources'
-    id = Column(Text, primary_key=True)
+    id = Column(String(255), primary_key=True)
     content = Column(LargeBinary, nullable=False)
     data_type = Column(Text, nullable=False)