Sergey Vanyushkin
87b094220d
Complete architectural refactoring from simple MVC to Clean Architecture/DDD pattern: Domain Layer: - Add entities (Post, BaseEntity) with business logic - Add value objects (Title, Content, Slug) with validation - Add repository interfaces (PostRepository) - Add domain exceptions Application Layer: - Add use cases (CreatePost, GetPost, UpdatePost, DeletePost, ListPosts, PublishPost) - Add DTOs for data transfer - Add TransactionManager interface Infrastructure Layer: - Add SQLAlchemy models and async database connection - Add SQLAlchemyPostRepository implementation - Add Dishka DI container with providers - Add error handlers and middleware Presentation Layer: - Add FastAPI routes with Dishka integration - Add Pydantic schemas - Add dependency injection using FromDishka[T] Other Changes: - Remove old flat structure (api/, common/, core/, modules/) - Add hatchling build system for package scripts - Add blog CLI command - Update AGENTS.md with new architecture docs - All 48 tests passing, mypy clean, ruff clean
50 lines
1.6 KiB
Python
50 lines
1.6 KiB
Python
"""Get post use case."""
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from uuid import UUID
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from app.application.dtos.post import PostResponseDTO
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from app.application.interfaces import TransactionManager
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from app.domain.entities import Post
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from app.domain.exceptions import NotFoundException
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from app.domain.repositories import PostRepository
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class GetPostUseCase:
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"""Use case for retrieving a post by ID or slug."""
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def __init__(
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self,
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post_repo: PostRepository,
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tx_manager: TransactionManager,
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) -> None:
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self._post_repo = post_repo
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self._tx_manager = tx_manager
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async def by_id(self, post_id: UUID) -> PostResponseDTO:
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"""Get post by ID."""
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post = await self._post_repo.get_by_id(post_id)
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if not post:
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raise NotFoundException(f"Post with id '{post_id}' not found")
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return self._map_to_dto(post)
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async def by_slug(self, slug: str) -> PostResponseDTO:
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"""Get post by slug."""
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post = await self._post_repo.get_by_slug(slug)
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if not post:
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raise NotFoundException(f"Post with slug '{slug}' not found")
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return self._map_to_dto(post)
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def _map_to_dto(self, post: Post) -> PostResponseDTO:
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"""Map domain entity to response DTO."""
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return PostResponseDTO(
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id=post.id,
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title=post.title.value,
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content=post.content.value,
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slug=post.slug.value,
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author_id=post.author_id,
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published=post.published,
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tags=post.tags.copy(),
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created_at=post.created_at,
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updated_at=post.updated_at,
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)
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