Add Tree model

models/tree.py

@@ -0,0 +1,20 @@
+from sqlalchemy import Column, String, Integer, ForeignKey
+from sqlalchemy.orm import relationship
+from sqlalchemy.sql import func
+from app.api.db.base_class import Base
+import uuid
+
+class Tree(Base):
+    __tablename__ = "trees"
+
+    id = Column(Integer, primary_key=True, index=True)
+    name = Column(String, nullable=False)
+    species = Column(String, nullable=False)
+    height = Column(Integer, nullable=False)
+    diameter = Column(Integer, nullable=False)
+    location_id = Column(Integer, ForeignKey("locations.id"), nullable=False)
+
+    location = relationship("Location", back_populates="trees")
+
+    created_at = Column(DateTime, default=func.now())
+    updated_at = Column(DateTime, default=func.now(), onupdate=func.now())