Make last_name optional and add default for first_name.

Updated the schemas and models to make `last_name` optional and set a default value of "user" for `first_name`. This change enhances flexibility for user data handling and ensures proper defaults when values are not provided.

backend/app/alembic/versions/38bf9e7e74b3_add_all_initial_models.py

@@ -35,7 +35,7 @@ def upgrade() -> None:
     sa.Column('email', sa.String(), nullable=False),
     sa.Column('password_hash', sa.String(), nullable=False),
     sa.Column('first_name', sa.String(), nullable=False),
-    sa.Column('last_name', sa.String(), nullable=False),
+    sa.Column('last_name', sa.String(), nullable=True),
     sa.Column('phone_number', sa.String(), nullable=True),
     sa.Column('is_active', sa.Boolean(), nullable=False),
     sa.Column('is_superuser', sa.Boolean(), nullable=False),

backend/app/models/user.py

@@ -8,8 +8,8 @@ class User(Base, UUIDMixin, TimestampMixin):
 
     email = Column(String, unique=True, nullable=False, index=True)
     password_hash = Column(String, nullable=False)
-    first_name = Column(String, nullable=False)
-    last_name = Column(String, nullable=False)
+    first_name = Column(String, nullable=False, default="user")
+    last_name = Column(String, nullable=True)
     phone_number = Column(String)
     is_active = Column(Boolean, default=True, nullable=False)
     is_superuser = Column(Boolean, default=False, nullable=False)

backend/app/schemas/users.py

@@ -10,7 +10,7 @@ from pydantic import BaseModel, EmailStr, field_validator, ConfigDict
 class UserBase(BaseModel):
     email: EmailStr
     first_name: str
-    last_name: str
+    last_name: Optional[str] = None
     phone_number: Optional[str] = None
 
     @field_validator('phone_number')