finish api basic setup

api/extensions.py

@@ -0,0 +1,34 @@
+from flask_jwt_extended import JWTManager
+from flask_migrate import Migrate
+from flask_sqlalchemy import SQLAlchemy, Model
+
+class CRUDMixin(Model):
+    """Mixin that adds convenience methods for CRUD (create, read, update, delete) operations."""
+
+    @classmethod
+    def create(cls, **kwargs):
+        """Create a new record and save it the database."""
+        instance = cls(**kwargs)
+        return instance.save()
+
+    def update(self, commit=True, **kwargs):
+        """Update specific fields of a record."""
+        for attr, value in kwargs.items():
+            setattr(self, attr, value)
+        return commit and self.save() or self
+
+    def save(self, commit=True):
+        """Save the record."""
+        db.session.add(self)
+        if commit:
+            db.session.commit()
+        return self
+
+    def delete(self, commit=True):
+        """Remove the record from the database."""
+        db.session.delete(self)
+        return commit and db.session.commit()
+
+db = SQLAlchemy(model_class=CRUDMixin)
+migrate = Migrate()
+jwt = JWTManager()