first upload

backend/app/models.py

@@ -0,0 +1,37 @@
+from sqlalchemy import Column, Integer, String, Float, DateTime, ForeignKey
+from sqlalchemy.sql import func
+from .database import Base
+
+class Drug(Base):
+    __tablename__ = "drugs"
+
+    id = Column(Integer, primary_key=True, index=True)
+    name = Column(String, unique=True, index=True, nullable=False)
+    description = Column(String, nullable=True)
+    created_at = Column(DateTime(timezone=True), server_default=func.now())
+    updated_at = Column(DateTime(timezone=True), onupdate=func.now(), server_default=func.now())
+
+
+class DrugVariant(Base):
+    __tablename__ = "drug_variants"
+
+    id = Column(Integer, primary_key=True, index=True)
+    drug_id = Column(Integer, ForeignKey("drugs.id"), nullable=False)
+    strength = Column(String, nullable=False)  # e.g., "5.4mg", "16mg", "100ml"
+    quantity = Column(Float, nullable=False, default=0)
+    unit = Column(String, nullable=False, default="units")  # tablets, bottles, ml, etc
+    low_stock_threshold = Column(Float, nullable=False, default=10)
+    created_at = Column(DateTime(timezone=True), server_default=func.now())
+    updated_at = Column(DateTime(timezone=True), onupdate=func.now(), server_default=func.now())
+
+
+class Dispensing(Base):
+    __tablename__ = "dispensings"
+
+    id = Column(Integer, primary_key=True, index=True)
+    drug_variant_id = Column(Integer, ForeignKey("drug_variants.id"), nullable=False)
+    quantity = Column(Float, nullable=False)
+    animal_name = Column(String, nullable=False)  # Name/ID of the animal
+    user_name = Column(String, nullable=False)  # User who dispensed
+    dispensed_at = Column(DateTime(timezone=True), server_default=func.now(), index=True)
+    notes = Column(String, nullable=True)