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53 lines
1.7 KiB
Python
53 lines
1.7 KiB
Python
import uuid
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from sqlalchemy import Column, DateTime, ForeignKey, Integer, String, func
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from sqlalchemy.dialects.postgresql import UUID, ENUM, JSON, JSONB, HSTORE, ARRAY
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from sqlalchemy.sql.expression import text
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from sqlalchemy.orm import backref, relationship
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from database import Base
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class Department(Base):
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__tablename__ = 'department'
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id = Column(Integer, primary_key=True)
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name = Column(String)
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class Role(Base):
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__tablename__ = 'roles'
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role_id = Column(Integer, primary_key=True)
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name = Column(String)
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class Employee(Base):
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__tablename__ = 'employee'
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id = Column(Integer, primary_key=True)
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name = Column(String)
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# Use default=func.now() to set the default hiring time
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# of an Employee to be the current time when an
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# Employee record was created
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hired_on = Column(DateTime, default=func.now())
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department_id = Column(Integer, ForeignKey('department.id'))
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role_id = Column(Integer, ForeignKey('roles.role_id'))
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# Uncomment below for postgresql specific fields testing
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# uuid = Column(UUID(), server_default=text("uuid_generate_v4()"))
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# is_active = Column(ENUM('Yes', 'No', name='is_active'), default="Yes")
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# json_data = Column(JSON())
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# jsonb_data = Column(JSONB())
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# hstore_data = Column(HSTORE())
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# articles = Column(ARRAY(Integer))
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# Use cascade='delete,all' to propagate the deletion of a Department onto its Employees
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department = relationship(
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Department,
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backref=backref('employees',
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uselist=True,
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cascade='delete,all'))
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role = relationship(
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Role,
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backref=backref('roles',
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uselist=True,
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cascade='delete,all'))
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