feat(models): add basic database structure

7project/backend/app/models/categories.py

@@ -0,0 +1,22 @@
+from fastapi_users_db_sqlalchemy import GUID
+from sqlalchemy import Column, Integer, String, ForeignKey, Table
+from sqlalchemy.orm import relationship
+
+from app.core.base import Base
+
+association_table = Table(
+    "category_transaction",
+    Base.metadata,
+    Column("id_category", Integer, ForeignKey("categories.id")),
+    Column("id_transaction", Integer, ForeignKey("transaction.id"))
+)
+
+
+class Category(Base):
+    __tablename__ = "categories"
+    id = Column(Integer, primary_key=True, autoincrement=True)
+    name = Column(String(length=100), unique=True, nullable=False)
+    description = Column(String(length=255), nullable=True)
+    user_id = Column(GUID, ForeignKey("user.id"), nullable=False)
+    user = relationship("User", back_populates="categories")
+    relationship(secondary=association_table)

7project/backend/app/models/transaction.py

@@ -1,9 +1,15 @@
-from sqlalchemy import Column, Integer, String, Float
+from fastapi_users_db_sqlalchemy import GUID
+from sqlalchemy import Column, Integer, String, Float, ForeignKey, UUID
+from sqlalchemy.orm import relationship
 from app.core.base import Base
 
+
 class Transaction(Base):
     __tablename__ = "transaction"
     id = Column(Integer, primary_key=True, autoincrement=True)
     amount = Column(Float, nullable=False)
     description = Column(String(length=255), nullable=True)
+    user_id = Column(GUID, ForeignKey("user.id"), nullable=False)
 
+    # Relationship
+    user = relationship("User", back_populates="transactions")

7project/backend/app/models/user.py

@@ -1,7 +1,13 @@
 from sqlalchemy import Column, String
+from sqlalchemy.orm import relationship
 from fastapi_users.db import SQLAlchemyBaseUserTableUUID
 from app.core.base import Base
 
+
 class User(SQLAlchemyBaseUserTableUUID, Base):
     first_name = Column(String(length=100), nullable=True)
     last_name = Column(String(length=100), nullable=True)
+
+    # Relationship
+    transactions = relationship("Transaction", back_populates="user")
+    categories = relationship("Category", back_populates="user")