from sqlalchemy import Column, Integer, String, ForeignKey, VARCHAR
from sqlalchemy.orm import relationship

from app.domain.models import Base


class Lesson(Base):
    __tablename__ = 'lessons'

    id = Column(Integer, primary_key=True, autoincrement=True)
    title = Column(VARCHAR(200), nullable=False)
    description = Column(String, nullable=False)

    course_id = Column(Integer, ForeignKey('courses.id'), nullable=False)

    course = relationship('Course', back_populates='lessons')

    steps = relationship('Step', back_populates='lesson')