changed project structure and splited models and routes files

src/app/database.py

@@ -0,0 +1,14 @@
+from sqlmodel import create_engine, SQLModel, Session
+from decouple import config
+
+# Get database configuration
+DATABASE_URL = config('DATABASE_URL', cast=str, default='sqlite:///./bookapi.db')
+
+# Create database engine
+engine = create_engine(str(DATABASE_URL), echo=True)
+# SQLModel.metadata.create_all(engine)
+
+# Get database session
+def get_session():
+    with Session(engine) as session:
+        yield session

src/app/main.py

@@ -0,0 +1,45 @@
+from alembic import command
+from alembic.config import Config
+from fastapi import FastAPI
+from sqlmodel import SQLModel
+
+from .database import engine
+from .routers import api_router
+from .routers.misc import get_info
+
+alembic_cfg = Config("alembic.ini")
+
+app = FastAPI(
+    title="LibraryAPI",
+    description="This is a sample API for managing authors and books.",
+    version="1.0.1",
+    openapi_tags=[
+        {
+            "name": "authors",
+            "description": "Operations with authors.",
+        },
+        {
+            "name": "books",
+            "description": "Operations with books.",
+        },
+        {
+            "name": "relations",
+            "description": "Operations with relations.",
+        },
+        {
+            "name": "misc",
+            "description": "Miscellaneous operations.",
+        }
+    ]
+)
+
+# Initialize the database
+@app.on_event("startup")
+def on_startup():
+    # Apply database migrations
+    with engine.begin() as connection:
+        alembic_cfg.attributes['connection'] = connection
+        command.upgrade(alembic_cfg, "head")
+
+# Include routers
+app.include_router(api_router)

src/app/migrations/README

@@ -0,0 +1 @@
+Generic single-database configuration.

src/app/migrations/env.py

@@ -0,0 +1,81 @@
+from logging.config import fileConfig
+from decouple import config as conf
+from alembic import context
+
+from sqlalchemy import engine_from_config
+from sqlalchemy import pool
+from sqlmodel import SQLModel
+
+DATABASE_URL = conf("DATABASE_URL")
+
+# this is the Alembic Config object, which provides
+# access to the values within the .ini file in use.
+config = context.config
+config.set_main_option("sqlalchemy.url", str(DATABASE_URL))
+
+# Interpret the config file for Python logging.
+# This line sets up loggers basically.
+if config.config_file_name is not None:
+    fileConfig(config.config_file_name)
+
+# add your model's MetaData object here
+# for 'autogenerate' support
+from app.models import Book, Author, AuthorBookLink
+target_metadata = SQLModel.metadata
+
+# other values from the config, defined by the needs of env.py,
+# can be acquired:
+# my_important_option = config.get_main_option("my_important_option")
+# ... etc.
+
+
+def run_migrations_offline() -> None:
+    """Run migrations in 'offline' mode.
+
+    This configures the context with just a URL
+    and not an Engine, though an Engine is acceptable
+    here as well.  By skipping the Engine creation
+    we don't even need a DBAPI to be available.
+
+    Calls to context.execute() here emit the given string to the
+    script output.
+
+    """
+    url = config.get_main_option("sqlalchemy.url")
+    context.configure(
+        url=url,
+        target_metadata=target_metadata,
+        literal_binds=True,
+        dialect_opts={"paramstyle": "named"},
+    )
+
+    with context.begin_transaction():
+        context.run_migrations()
+
+
+def run_migrations_online() -> None:
+    """Run migrations in 'online' mode.
+
+    In this scenario we need to create an Engine
+    and associate a connection with the context.
+
+    """
+    connectable = engine_from_config(
+        config.get_section(config.config_ini_section, {}),
+        prefix="sqlalchemy.",
+        poolclass=pool.NullPool,
+    )
+
+    with connectable.connect() as connection:
+        context.configure(
+            connection=connection, target_metadata=target_metadata
+        )
+
+        with context.begin_transaction():
+            context.run_migrations()
+
+
+if context.is_offline_mode():
+    run_migrations_offline()
+else:
+    run_migrations_online()

src/app/migrations/script.py.mako

@@ -0,0 +1,27 @@
+"""${message}
+
+Revision ID: ${up_revision}
+Revises: ${down_revision | comma,n}
+Create Date: ${create_date}
+
+"""
+from typing import Sequence, Union
+
+from alembic import op
+import sqlalchemy as sa
+import sqlmodel
+${imports if imports else ""}
+
+# revision identifiers, used by Alembic.
+revision: str = ${repr(up_revision)}
+down_revision: Union[str, None] = ${repr(down_revision)}
+branch_labels: Union[str, Sequence[str], None] = ${repr(branch_labels)}
+depends_on: Union[str, Sequence[str], None] = ${repr(depends_on)}
+
+
+def upgrade() -> None:
+    ${upgrades if upgrades else "pass"}
+
+
+def downgrade() -> None:
+    ${downgrades if downgrades else "pass"}

src/app/migrations/versions/d266fdc61e99_init.py

@@ -0,0 +1,54 @@
+"""init
+
+Revision ID: d266fdc61e99
+Revises: 
+Create Date: 2025-05-27 18:04:22.279035
+
+"""
+from typing import Sequence, Union
+
+from alembic import op
+import sqlalchemy as sa
+import sqlmodel
+
+
+# revision identifiers, used by Alembic.
+revision: str = 'd266fdc61e99'
+down_revision: Union[str, None] = None
+branch_labels: Union[str, Sequence[str], None] = None
+depends_on: Union[str, Sequence[str], None] = None
+
+
+def upgrade() -> None:
+    # ### commands auto generated by Alembic - please adjust! ###
+    op.create_table('author',
+    sa.Column('id', sa.Integer(), nullable=False),
+    sa.Column('name', sqlmodel.sql.sqltypes.AutoString(), nullable=False),
+    sa.PrimaryKeyConstraint('id')
+    )
+    op.create_index(op.f('ix_author_id'), 'author', ['id'], unique=False)
+    op.create_table('book',
+    sa.Column('id', sa.Integer(), nullable=False),
+    sa.Column('title', sqlmodel.sql.sqltypes.AutoString(), nullable=False),
+    sa.Column('description', sqlmodel.sql.sqltypes.AutoString(), nullable=False),
+    sa.PrimaryKeyConstraint('id')
+    )
+    op.create_index(op.f('ix_book_id'), 'book', ['id'], unique=False)
+    op.create_table('authorbooklink',
+    sa.Column('author_id', sa.Integer(), nullable=False),
+    sa.Column('book_id', sa.Integer(), nullable=False),
+    sa.ForeignKeyConstraint(['author_id'], ['author.id'], ),
+    sa.ForeignKeyConstraint(['book_id'], ['book.id'], ),
+    sa.PrimaryKeyConstraint('author_id', 'book_id')
+    )
+    # ### end Alembic commands ###
+
+
+def downgrade() -> None:
+    # ### commands auto generated by Alembic - please adjust! ###
+    op.drop_table('authorbooklink')
+    op.drop_index(op.f('ix_book_id'), table_name='book')
+    op.drop_table('book')
+    op.drop_index(op.f('ix_author_id'), table_name='author')
+    op.drop_table('author')
+    # ### end Alembic commands ###

src/app/models/__init__.py

@@ -0,0 +1,5 @@
+from .author import Author, AuthorBase
+from .book import Book, BookBase
+from .links import AuthorBookLink
+
+__all__ = ['Author', 'AuthorBase', 'Book', 'BookBase', 'AuthorBookLink']

src/app/models/author.py

@@ -0,0 +1,20 @@
+from typing import List, Optional
+from sqlmodel import SQLModel, Field, Relationship
+from .links import AuthorBookLink
+from .book import Book
+
+# Author DTO model
+class AuthorBase(SQLModel):
+    name: str
+
+    class Config: # pyright: ignore
+        json_schema_extra = {
+            "example": {
+                "name": "author_name",
+            }
+        }
+
+# Author DB model
+class Author(AuthorBase, table=True):
+    id: Optional[int] = Field(default=None, primary_key=True, index=True)
+    books: List["Book"] = Relationship(back_populates="authors", link_model=AuthorBookLink)

src/app/models/book.py

@@ -0,0 +1,22 @@
+from typing import List, Optional
+from sqlmodel import SQLModel, Field, Relationship
+from .links import AuthorBookLink
+from .author import Author
+
+# Book DTO model
+class BookBase(SQLModel):
+    title: str
+    description: str
+
+    class Config: # pyright: ignore
+        json_schema_extra = {
+            "example": {
+                "title": "book_title",
+                "description": "book_description",
+            }
+        }
+
+# Book DB model
+class Book(BookBase, table=True):
+    id: Optional[int] = Field(default=None, primary_key=True, index=True)
+    authors: List["Author"] = Relationship(back_populates="books", link_model=AuthorBookLink)

src/app/models/links.py

@@ -0,0 +1,6 @@
+from sqlmodel import SQLModel, Field
+
+# Relationship model
+class AuthorBookLink(SQLModel, table=True):
+    author_id: int | None = Field(default=None, foreign_key="author.id", primary_key=True)
+    book_id: int | None = Field(default=None, foreign_key="book.id", primary_key=True)

src/app/routers/__init__.py

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+from fastapi import APIRouter
+
+from .authors import router as authors_router
+from .books import router as books_router
+from .relationships import router as relationships_router
+from .misc import router as misc_router
+
+api_router = APIRouter()
+
+api_router.include_router(authors_router)
+api_router.include_router(books_router)
+api_router.include_router(relationships_router)
+api_router.include_router(misc_router)

src/app/routers/authors.py

@@ -0,0 +1,45 @@
+from fastapi import APIRouter, Depends, HTTPException
+from sqlmodel import Session, select
+from typing import List
+
+from ..database import get_session
+from ..models import Author, AuthorBase
+
+router = APIRouter(prefix="/authors", tags=["authors"])
+
+# Create an author
+@router.post("/", response_model=Author)
+def create_author(author: AuthorBase, session: Session = Depends(get_session)):
+    db_author = Author(name=author.name)
+    session.add(db_author)
+    session.commit()
+    session.refresh(db_author)
+    return db_author
+
+# Read authors
+@router.get("/", response_model=List[Author])
+def read_authors(session: Session = Depends(get_session)):
+    authors = session.exec(select(Author)).all()
+    return authors
+
+# Update an author
+@router.put("/{author_id}", response_model=Author)
+def update_author(author_id: int, author: AuthorBase, session: Session = Depends(get_session)):
+    db_author = session.get(Author, author_id)
+    if not db_author:
+        raise HTTPException(status_code=404, detail="Author not found")
+    db_author.name = author.name
+    session.commit()
+    session.refresh(db_author)
+    return db_author
+
+# Delete an author
+@router.delete("/{author_id}", response_model=AuthorBase)
+def delete_author(author_id: int, session: Session = Depends(get_session)):
+    db_author = session.get(Author, author_id)
+    if not db_author:
+        raise HTTPException(status_code=404, detail="Author not found")
+    session.delete(db_author)
+    author = AuthorBase(name=db_author.name)
+    session.commit()
+    return author

src/app/routers/books.py

@@ -0,0 +1,62 @@
+from fastapi import APIRouter, Depends, HTTPException
+from sqlmodel import Session, select
+from typing import List
+
+from ..database import get_session
+from ..models import Book, BookBase, Author, AuthorBookLink
+
+router = APIRouter(prefix="/books", tags=["books"])
+
+# Create a book
+@router.post("/", response_model=Book)
+def create_book(book: BookBase, session: Session = Depends(get_session)):
+    db_book = Book(title=book.title, description=book.description)
+    session.add(db_book)
+    session.commit()
+    session.refresh(db_book)
+    return db_book
+
+# Read books
+@router.get("/", response_model=List[Book])
+def read_books(session: Session = Depends(get_session)):
+    books = session.exec(select(Book)).all()
+    return books
+
+# Update a book
+@router.put("/{book_id}", response_model=Book)
+def update_book(book_id: int, book: BookBase, session: Session = Depends(get_session)):
+    db_book = session.get(Book, book_id)
+    if not db_book:
+        raise HTTPException(status_code=404, detail="Book not found")
+
+    db_book.title = book.title
+    db_book.description = book.description
+    session.commit()
+    session.refresh(db_book)
+    return db_book
+
+# Delete a book
+@router.delete("/{book_id}", response_model=BookBase)
+def delete_book(book_id: int, session: Session = Depends(get_session)):
+    db_book = session.get(Book, book_id)
+    if not db_book:
+        raise HTTPException(status_code=404, detail="Book not found")
+    book = Book(title=db_book.title, description=db_book.description)
+    session.delete(db_book)
+    session.commit()
+    return book
+
+# Get all authors for a book
+@router.get("/{book_id}/authors/", response_model=List[Author], tags=["relations"])
+def get_authors_for_book(book_id: int, session: Session = Depends(get_session)):
+    book = session.get(Book, book_id)
+    if not book:
+        raise HTTPException(status_code=404, detail="Book not found")
+
+    authors = session.exec(
+        select(Author)
+        .join(AuthorBookLink)
+        .where(AuthorBookLink.book_id == book_id)
+    ).all()
+
+    return authors

src/app/routers/misc.py

@@ -0,0 +1,32 @@
+from fastapi import APIRouter, Request
+from fastapi.responses import HTMLResponse, JSONResponse
+from fastapi.templating import Jinja2Templates
+from pathlib import Path
+from datetime import datetime
+from typing import Dict
+
+# Инициализация шаблонов
+templates = Jinja2Templates(directory=Path(__file__).parent.parent / "templates")
+
+router = APIRouter(tags=["misc"])
+
+def get_info(app) -> Dict:
+    return {
+            "status": "ok",
+            "app_info": {
+                "title": app.title,
+                "version": app.version,
+                "description": app.description,
+            },
+            "server_time": datetime.now().isoformat(),
+        }
+
+# Root endpoint
+@router.get("/", response_class=HTMLResponse)
+async def root(request: Request, app=None):
+    return templates.TemplateResponse("index.html", {"request": request, "data": get_info(app)})
+
+# API Information endpoint
+@router.get("/api/info")
+async def api_info(app=None):
+    return JSONResponse(content=get_info(app))

src/app/routers/relationships.py

@@ -0,0 +1,54 @@
+from fastapi import APIRouter, Depends, HTTPException
+from sqlmodel import Session, select
+from typing import List, Dict
+
+from ..database import get_session
+from ..models import Author, Book, AuthorBookLink
+
+router = APIRouter(prefix="/relationships", tags=["relations"])
+
+# Add author to book
+@router.post("/", response_model=AuthorBookLink)
+def add_author_to_book(author_id: int, book_id: int, session: Session = Depends(get_session)):
+    # Check if author and book exist
+    author = session.get(Author, author_id)
+    if not author:
+        raise HTTPException(status_code=404, detail="Author not found")
+
+    book = session.get(Book, book_id)
+    if not book:
+        raise HTTPException(status_code=404, detail="Book not found")
+
+    # Check if relationship already exists
+    existing_link = session.exec(
+        select(AuthorBookLink)
+        .where(AuthorBookLink.author_id == author_id)
+        .where(AuthorBookLink.book_id == book_id)
+    ).first()
+
+    if existing_link:
+        raise HTTPException(status_code=400, detail="Relationship already exists")
+
+    # Create new relationship
+    link = AuthorBookLink(author_id=author_id, book_id=book_id)
+    session.add(link)
+    session.commit()
+    session.refresh(link)
+    return link
+
+# Remove author from book
+@router.delete("/", response_model=Dict[str, str])
+def remove_author_from_book(author_id: int, book_id: int, session: Session = Depends(get_session)):
+    # Find the relationship
+    link = session.exec(
+        select(AuthorBookLink)
+        .where(AuthorBookLink.author_id == author_id)
+        .where(AuthorBookLink.book_id == book_id)
+    ).first()
+
+    if not link:
+        raise HTTPException(status_code=404, detail="Relationship not found")
+
+    session.delete(link)
+    session.commit()
+    return {"message": "Relationship removed successfully"}

src/app/templates/index.html

@@ -0,0 +1,56 @@
+<!doctype html>
+<html lang="en">
+    <head>
+        <meta charset="UTF-8" />
+        <meta name="viewport" content="width=device-width, initial-scale=1.0" />
+        <title>{{ data.title }}</title>
+        <style>
+            body {
+                font-family: Arial, sans-serif;
+                max-width: 800px;
+                margin: 0 auto;
+                padding: 20px;
+                line-height: 1.6;
+                color: #333;
+            }
+            h1 {
+                color: #2c3e50;
+                border-bottom: 2px solid #3498db;
+                padding-bottom: 10px;
+            }
+            ul {
+                list-style: none;
+                padding: 0;
+            }
+            li {
+                margin: 15px 0;
+            }
+            a {
+                display: inline-block;
+                padding: 8px 15px;
+                background-color: #3498db;
+                color: white;
+                text-decoration: none;
+                border-radius: 4px;
+                transition: background-color 0.3s;
+            }
+            a:hover {
+                background-color: #2980b9;
+            }
+            p {
+                margin: 5px 0;
+            }
+        </style>
+    </head>
+    <body>
+        <h1>Welcome to {{ data.title }}!</h1>
+        <p>Description: {{ data.description }}</p>
+        <p>Version: {{ data.version }}</p>
+        <p>Current Time: {{ data.time }}</p>
+        <p>Status: {{ data.status }}</p>
+        <ul>
+            <li><a href="/docs">Swagger UI</a></li>
+            <li><a href="/redoc">ReDoc</a></li>
+        </ul>
+    </body>
+</html>