added core service

core/Dockerfile

+FROM python:3.10-slim-buster
+
+RUN pip3 install --upgrade pip && pip3 install poetry
+
+WORKDIR /app
+COPY pyproject.toml poetry.lock /app/
+
+RUN poetry config virtualenvs.create false \
+    && poetry install --no-interaction --no-ansi
+
+COPY . .

core/docker-compose.yml

+version: '3'
+
+services:
+  core:
+    build:
+      context: .
+      dockerfile: Dockerfile
+    image: core
+    container_name: core
+    restart: always
+    ports:
+      - "8000:8000"
+    env_file:
+      - .env
+    volumes:
+      - .:/app
+    command: bash -c "poetry run python3 src/app/main.py"
+    depends_on:
+      - core-db
+
+  core-db:
+    image: postgres:14-alpine
+    container_name: core-pg
+    environment:
+      POSTGRES_USER: ${DB_USER}
+      POSTGRES_PASSWORD: ${DB_PASSWORD}
+      POSTGRES_DB: ${DB_NAME}
+    ports:
+      - "5437:5432"
+    volumes:
+      - ./data/postgres:/var/lib/postgresql/data/
+
+
+networks:
+  default:
+    name: fa-2-exam-network

core/poetry.lock

+# This file is automatically @generated by Poetry 1.6.1 and should not be changed by hand.
+
+[[package]]
+name = "aerich"
+version = "0.7.2"
+description = "A database migrations tool for Tortoise ORM."
+optional = false
+python-versions = ">=3.7,<4.0"
+files = [
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+    {file = "aerich-0.7.2.tar.gz", hash = "sha256:31d67de7b96184636b89de99062e059e5e6204b6251d24c33eb21fc9cf982e09"},
+]
+
+[package.dependencies]
+click = "*"
+dictdiffer = "*"
+pydantic = "*"
+tomlkit = "*"
+tortoise-orm = "*"
+
+[package.extras]
+asyncmy = ["asyncmy (>=0.2.8rc1,<0.3.0)"]
+asyncpg = ["asyncpg"]
+
+[[package]]
+name = "aiosqlite"
+version = "0.17.0"
+description = "asyncio bridge to the standard sqlite3 module"
+optional = false
+python-versions = ">=3.6"
+files = [
+    {file = "aiosqlite-0.17.0-py3-none-any.whl", hash = "sha256:6c49dc6d3405929b1d08eeccc72306d3677503cc5e5e43771efc1e00232e8231"},
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+]
+
+[package.dependencies]
+typing_extensions = ">=3.7.2"
+
+[[package]]
+name = "annotated-types"
+version = "0.6.0"
+description = "Reusable constraint types to use with typing.Annotated"
+optional = false
+python-versions = ">=3.8"
+files = [
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+]
+
+[[package]]
+name = "anyio"
+version = "4.2.0"
+description = "High level compatibility layer for multiple asynchronous event loop implementations"
+optional = false
+python-versions = ">=3.8"
+files = [
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+
+[package.dependencies]
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+idna = ">=2.8"
+sniffio = ">=1.1"
+typing-extensions = {version = ">=4.1", markers = "python_version < \"3.11\""}
+
+[package.extras]
+doc = ["Sphinx (>=7)", "packaging", "sphinx-autodoc-typehints (>=1.2.0)", "sphinx-rtd-theme"]
+test = ["anyio[trio]", "coverage[toml] (>=7)", "exceptiongroup (>=1.2.0)", "hypothesis (>=4.0)", "psutil (>=5.9)", "pytest (>=7.0)", "pytest-mock (>=3.6.1)", "trustme", "uvloop (>=0.17)"]
+trio = ["trio (>=0.23)"]
+
+[[package]]
+name = "async-timeout"
+version = "4.0.3"
+description = "Timeout context manager for asyncio programs"
+optional = false
+python-versions = ">=3.7"
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+
+[[package]]
+name = "asyncpg"
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+description = "An asyncio PostgreSQL driver"
+optional = false
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+
+[[package]]
+name = "pypika-tortoise"
+version = "0.1.6"
+description = "Forked from pypika and streamline just for tortoise-orm"
+optional = false
+python-versions = ">=3.7,<4.0"
+files = [
+    {file = "pypika-tortoise-0.1.6.tar.gz", hash = "sha256:d802868f479a708e3263724c7b5719a26ad79399b2a70cea065f4a4cadbebf36"},
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+]
+
+[[package]]
+name = "pytz"
+version = "2023.3.post1"
+description = "World timezone definitions, modern and historical"
+optional = false
+python-versions = "*"
+files = [
+    {file = "pytz-2023.3.post1-py2.py3-none-any.whl", hash = "sha256:ce42d816b81b68506614c11e8937d3aa9e41007ceb50bfdcb0749b921bf646c7"},
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+]
+
+[[package]]
+name = "sniffio"
+version = "1.3.0"
+description = "Sniff out which async library your code is running under"
+optional = false
+python-versions = ">=3.7"
+files = [
+    {file = "sniffio-1.3.0-py3-none-any.whl", hash = "sha256:eecefdce1e5bbfb7ad2eeaabf7c1eeb404d7757c379bd1f7e5cce9d8bf425384"},
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+]
+
+[[package]]
+name = "starlette"
+version = "0.35.1"
+description = "The little ASGI library that shines."
+optional = false
+python-versions = ">=3.8"
+files = [
+    {file = "starlette-0.35.1-py3-none-any.whl", hash = "sha256:50bbbda9baa098e361f398fda0928062abbaf1f54f4fadcbe17c092a01eb9a25"},
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+]
+
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+
+[package.extras]
+full = ["httpx (>=0.22.0)", "itsdangerous", "jinja2", "python-multipart", "pyyaml"]
+
+[[package]]
+name = "tomlkit"
+version = "0.12.3"
+description = "Style preserving TOML library"
+optional = false
+python-versions = ">=3.7"
+files = [
+    {file = "tomlkit-0.12.3-py3-none-any.whl", hash = "sha256:b0a645a9156dc7cb5d3a1f0d4bab66db287fcb8e0430bdd4664a095ea16414ba"},
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+]
+
+[[package]]
+name = "tortoise-orm"
+version = "0.20.0"
+description = "Easy async ORM for python, built with relations in mind"
+optional = false
+python-versions = ">=3.8,<4.0"
+files = [
+    {file = "tortoise_orm-0.20.0-py3-none-any.whl", hash = "sha256:1891ad935de689ddf002c5c65c864176d28659ab6069e45f0e2cde32359bb8d9"},
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+]
+
+[package.dependencies]
+aiosqlite = ">=0.16.0,<0.18.0"
+iso8601 = ">=1.0.2,<2.0.0"
+pypika-tortoise = ">=0.1.6,<0.2.0"
+pytz = "*"
+
+[package.extras]
+accel = ["ciso8601", "orjson", "uvloop"]
+aiomysql = ["aiomysql"]
+asyncmy = ["asyncmy (>=0.2.8,<0.3.0)"]
+asyncodbc = ["asyncodbc (>=0.1.1,<0.2.0)"]
+asyncpg = ["asyncpg"]
+psycopg = ["psycopg[binary,pool] (>=3.0.12,<4.0.0)"]
+
+[[package]]
+name = "typing-extensions"
+version = "4.9.0"
+description = "Backported and Experimental Type Hints for Python 3.8+"
+optional = false
+python-versions = ">=3.8"
+files = [
+    {file = "typing_extensions-4.9.0-py3-none-any.whl", hash = "sha256:af72aea155e91adfc61c3ae9e0e342dbc0cba726d6cba4b6c72c1f34e47291cd"},
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+]
+
+[[package]]
+name = "uvicorn"
+version = "0.25.0"
+description = "The lightning-fast ASGI server."
+optional = false
+python-versions = ">=3.8"
+files = [
+    {file = "uvicorn-0.25.0-py3-none-any.whl", hash = "sha256:ce107f5d9bd02b4636001a77a4e74aab5e1e2b146868ebbad565237145af444c"},
+    {file = "uvicorn-0.25.0.tar.gz", hash = "sha256:6dddbad1d7ee0f5140aba5ec138ddc9612c5109399903828b4874c9937f009c2"},
+]
+
+[package.dependencies]
+click = ">=7.0"
+h11 = ">=0.8"
+typing-extensions = {version = ">=4.0", markers = "python_version < \"3.11\""}
+
+[package.extras]
+standard = ["colorama (>=0.4)", "httptools (>=0.5.0)", "python-dotenv (>=0.13)", "pyyaml (>=5.1)", "uvloop (>=0.14.0,!=0.15.0,!=0.15.1)", "watchfiles (>=0.13)", "websockets (>=10.4)"]
+
+[metadata]
+lock-version = "2.0"
+python-versions = "^3.10"
+content-hash = "2532338171fa56a43d0e18eea0bba8898611c1d896d58d9b4e9441c470757956"

core/pyproject.toml

+[tool.poetry]
+name = "core"
+version = "0.1.0"
+description = ""
+authors = ["beka <beka1990.30.10@gmail.com>"]
+readme = "README.md"
+
+[tool.poetry.dependencies]
+python = "^3.10"
+fastapi = "^0.109.0"
+uvicorn = "^0.25.0"
+tortoise-orm = "^0.20.0"
+aerich = "^0.7.2"
+asyncpg = "^0.29.0"
+httpx = "^0.26.0"
+
+
+
+[tool.aerich]
+tortoise_orm = "src.app.db.conf.TORTOISE_ORM"
+location = "src/migrations"
+src_folder = "./."
+[build-system]
+requires = ["poetry-core"]
+build-backend = "poetry.core.masonry.api"

core/src/app/api/chapter/ctrl.py

+from uuid import UUID
+
+from starlette import status
+import fastapi
+from tortoise.exceptions import ValidationError
+
+from base_ctrl import BaseController
+from exceptions import common as common_exc, http as http_exc
+from .services import ChapterService
+
+
+class ChapterController(BaseController):
+    chapter_service = ChapterService()
+
+    async def get_list(self, **kwargs):
+        return await self.chapter_service.get_chapter_list(**kwargs)
+
+    async def get(self, id: UUID):
+        try:
+            return await self.chapter_service.get_chapter(id)
+
+        except common_exc.NotFoundException as e:
+            raise http_exc.HTTPNotFoundException(detail=str(e))
+
+    async def create(self, **kwargs):
+        try:
+            return await self.chapter_service.create_chapter(**kwargs)
+
+        except common_exc.CreateException as e:
+            raise http_exc.HTTPBadRequestException(detail=str(e))
+
+        except ValidationError as e:
+            raise http_exc.HTTPBadRequestException(detail=f"Validation error: {str(e)}")
+
+    async def update(self, id: UUID, **kwargs):
+        try:
+            return await self.chapter_service.update_chapter(id, **kwargs)
+
+        except common_exc.UpdateException as e:
+            raise http_exc.HTTPBadRequestException(detail=str(e))
+
+    async def delete(self, id: UUID):
+        try:
+            await self.chapter_service.delete_chapter(id)
+            return fastapi.responses.Response(status_code=status.HTTP_204_NO_CONTENT)
+
+        except common_exc.DeleteException as e:
+            raise http_exc.HTTPBadRequestException(detail=str(e))
+
+        except common_exc.NotFoundException as e:
+            raise http_exc.HTTPNotFoundException(detail=str(e))

core/src/app/api/chapter/routes.py

+from uuid import UUID
+
+import fastapi
+
+from .schemas import ChapterBaseSchema
+from .ctrl import ChapterController
+
+
+router = fastapi.APIRouter(prefix='/chapters', tags=['Chapter'])
+ctrl = ChapterController()
+
+
+@router.get("")
+async def get_chapters(
+    query: ChapterBaseSchema = fastapi.Depends(),
+):
+    return await ctrl.get_list(**query.model_dump(exclude_none=True))
+
+
+@router.get('/{id}')
+async def get_chapter(
+    id: UUID,
+):
+    return await ctrl.get(id)
+
+
+@router.post('')
+async def create_chapter(
+    body: ChapterBaseSchema,
+):
+    return await ctrl.create(**body.model_dump(exclude_none=True))
+
+
+@router.patch('/{id}')
+async def update_chapter(
+    id: UUID, body: ChapterBaseSchema,
+):
+    return await ctrl.update(id, **body.model_dump(exclude_none=True))
+
+
+@router.delete('/{id}')
+async def delete_chapter(
+    id: UUID,
+):
+    return await ctrl.delete(id)

core/src/app/api/chapter/schemas.py

+from uuid import UUID
+
+from pydantic import BaseModel, ConfigDict
+
+
+class ChapterBaseSchema(BaseModel):
+    name: str | None = None
+
+
+class ChapterIdSchema(BaseModel):
+    id: UUID
+
+    model_config = ConfigDict(from_attributes=True)
+
+
+class ChapterSchema(ChapterBaseSchema, ChapterIdSchema):
+    pass

core/src/app/api/chapter/services.py

+from uuid import UUID
+
+from db.repositories import ChapterRepository
+from .schemas import ChapterSchema
+
+
+class ChapterService:
+    chapter_repository = ChapterRepository()
+
+    async def get_chapter_list(self, **kwargs):
+        chapters = await self.chapter_repository.get_list(**kwargs)
+        return [ChapterSchema.model_validate(chapter) for chapter in chapters]
+
+    async def get_chapter(self, id: UUID):
+        chapter = await self.chapter_repository.get(id)
+        return ChapterSchema.model_validate(chapter)
+
+    async def create_chapter(self, **kwargs):
+        chapter = await self.chapter_repository.create(**kwargs)
+        return ChapterSchema.model_validate(chapter)
+
+    async def update_chapter(self, id: UUID, **kwargs):
+        chapter = await self.chapter_repository.update(id, **kwargs)
+        return ChapterSchema.model_validate(chapter)
+
+    async def delete_chapter(self, id: UUID):
+        return await self.chapter_repository.delete(id)

core/src/app/api/dependencies.py

+import httpx
+import fastapi as fa
+
+
+async def get_current_user(token: str):
+    auth_service_url = "http://auth:8000/api/auth/check_token"
+
+    async with httpx.AsyncClient() as client:
+        data = {"token": token}
+        response = await client.post(auth_service_url, json=data)
+
+        if response.status_code == 200:
+            result = response.json()
+            if result.get("success"):
+                return result
+            else:
+                raise fa.HTTPException(
+                    status_code=401,
+                    detail="Unauthorized: Invalid token",
+                )
+        else:
+            raise fa.HTTPException(
+                status_code=fa.status.HTTP_400_BAD_REQUEST,
+                detail="Error while fetching user data",
+            )

core/src/app/api/material/ctrl.py

+from uuid import UUID
+
+from starlette import status
+import fastapi
+from tortoise.exceptions import ValidationError
+
+from base_ctrl import BaseController
+from exceptions import common as common_exc, http as http_exc
+from .services import MaterialService
+
+
+class MaterialController(BaseController):
+    material_service = MaterialService()
+
+    async def get_list(self, **kwargs):
+        return await self.material_service.get_material_list(**kwargs)
+
+    async def get(self, id: UUID):
+        try:
+            return await self.material_service.get_material(id)
+
+        except common_exc.NotFoundException as e:
+            raise http_exc.HTTPNotFoundException(detail=str(e))
+
+    async def create(self, **kwargs):
+        try:
+            return await self.material_service.create_material(**kwargs)
+
+        except common_exc.CreateException as e:
+            raise http_exc.HTTPBadRequestException(detail=str(e))
+
+        except ValidationError as e:
+            raise http_exc.HTTPBadRequestException(detail=f"Validation error: {str(e)}")
+
+    async def update(self, id: UUID, **kwargs):
+        try:
+            return await self.material_service.update_material(id, **kwargs)
+
+        except common_exc.UpdateException as e:
+            raise http_exc.HTTPBadRequestException(detail=str(e))
+
+    async def delete(self, id: UUID):
+        try:
+            await self.material_service.delete_material(id)
+            return fastapi.responses.Response(status_code=status.HTTP_204_NO_CONTENT)
+
+        except common_exc.DeleteException as e:
+            raise http_exc.HTTPBadRequestException(detail=str(e))
+
+        except common_exc.NotFoundException as e:
+            raise http_exc.HTTPNotFoundException(detail=str(e))
+
+    async def set_material_view(self, **kwargs):
+        try:
+            return await self.material_service.set_material_view(**kwargs)
+
+        except common_exc.CreateException as e:
+            raise http_exc.HTTPBadRequestException(detail=str(e))
+
+        except ValidationError as e:
+            raise http_exc.HTTPBadRequestException(detail=f"Validation error: {str(e)}")

core/src/app/api/material/routes.py

+from uuid import UUID
+
+import fastapi
+
+from .schemas import MaterialBaseSchema, MaterialPostSchema, MaterialSetSchema
+from .ctrl import MaterialController
+from ..dependencies import get_current_user
+
+
+router = fastapi.APIRouter(prefix='/materials', tags=['Material'])
+ctrl = MaterialController()
+
+
+@router.get("")
+async def get_materials(
+    query: MaterialBaseSchema = fastapi.Depends(),
+):
+    return await ctrl.get_list(**query.model_dump(exclude_none=True))
+
+
+@router.get('/{id}')
+async def get_material(
+    id: UUID,
+):
+    return await ctrl.get(id)
+
+
+
+@router.post('')
+async def create_material(
+    body: MaterialPostSchema,
+):
+    return await ctrl.create(**body.model_dump(exclude_none=True))
+
+
+@router.patch('/{id}')
+async def update_material(
+    id: UUID, body: MaterialPostSchema,
+):
+    return await ctrl.update(id, **body.model_dump(exclude_none=True))
+
+
+@router.delete('/{id}')
+async def delete_material(
+    id: UUID,
+):
+    return await ctrl.delete(id)
+
+
+@router.post('view_material')
+async def set_view_material(
+    token: str,
+    body: MaterialSetSchema
+):
+    token_is_valid = await get_current_user(token)
+    if token_is_valid:
+        return await ctrl.create(**body.model_dump(exclude_none=True))

core/src/app/api/material/schemas.py

+from uuid import UUID
+
+from pydantic import BaseModel, ConfigDict
+
+
+class MaterialBaseSchema(BaseModel):
+    name: str | None = None
+    text: str | None = None
+    chapter_id: UUID | None = None
+
+
+class MaterialIdSchema(BaseModel):
+    id: UUID
+
+    model_config = ConfigDict(from_attributes=True)
+
+
+class MaterialSchema(MaterialBaseSchema, MaterialIdSchema):
+    pass
+
+
+class MaterialPostSchema(MaterialBaseSchema):
+    chapter_id: UUID | None = None
+
+
+class MaterialSetSchema(BaseModel):
+    material_id: UUID

core/src/app/api/material/services.py

+from uuid import UUID
+
+from db.repositories import MaterialRepository, ChapterRepository, UserMaterialViewRepository
+from .schemas import MaterialSchema
+from exceptions import common as common_exc, http as http_exc
+
+
+class MaterialService:
+    material_repository = MaterialRepository()
+    chapter_repository = ChapterRepository()
+    user_view_repo = UserMaterialViewRepository()
+
+    async def get_material_list(self, **kwargs):
+        materials = await self.material_repository.get_list(**kwargs)
+        return [MaterialSchema.model_validate(material) for material in materials]
+
+    async def get_material(self, id: UUID):
+        material = await self.material_repository.get(id)
+        return MaterialSchema.model_validate(material)
+
+    async def create_material(self, **kwargs):
+        chapter_uuid = kwargs.get('chapter_id')
+        if chapter_uuid is None:
+            raise http_exc.HTTPBadRequestException(detail="Validation error: Chapter must not be None")
+        try:
+            chapter = await self.chapter_repository.get(chapter_uuid)
+        except common_exc.NotFoundException:
+            raise http_exc.HTTPBadRequestException(detail="Chapter does not exist")
+
+        material = await self.material_repository.create(
+            name=kwargs.get('name'),
+            text=kwargs.get('text'),
+            chapter=chapter,
+        )
+        return MaterialSchema.model_validate(material)
+
+    async def update_material(self, id: UUID, **kwargs):
+        chapter_uuid = kwargs.get('chapter_id')
+        if chapter_uuid:
+            try:
+                kwargs['chapter'] = await self.chapter_repository.get(chapter_uuid)
+            except common_exc.NotFoundException:
+                raise http_exc.HTTPBadRequestException(detail='Chapter does not exist')
+        material = await self.material_repository.update(id, **kwargs)
+        return MaterialSchema.model_validate(material)
+
+    async def delete_material(self, id: UUID):
+        return await self.material_repository.delete(id)
+
+    async def set_material_view(self, user, **kwargs):
+        material_uuid = kwargs.get('material_id')
+        print(kwargs)
+        if material_uuid is None:
+            raise http_exc.HTTPBadRequestException(detail="Validation error: Material must not be None")
+        try:
+            material = await self.material_repository.get(material_uuid)
+        except common_exc.NotFoundException:
+            raise http_exc.HTTPBadRequestException(detail="Material does not exist")
+
+        view = self.user_view_repo.create(user, material)
+        return {'detail': 'success'}

core/src/app/api/router.py

+from fastapi import APIRouter
+
+from .chapter.routes import router as chapter_route
+from .material.routes import router as material_route
+
+
+router = APIRouter(prefix='/api')
+router.include_router(chapter_route)
+router.include_router(material_route)

core/src/app/base_ctrl.py

+from exceptions import common as common_exc, http as http_exc
+
+
+class BaseController:
+    repo = None
+
+    async def get_list(self, **kwargs) -> list[dict]:
+        return await self.repo.get_list(**kwargs)
+
+    async def get(self, id: int) -> dict:
+        try:
+            return await self.repo.get(id)
+
+        except common_exc.NotFoundException as e:
+
+            raise http_exc.HTTPNotFoundException(detail=str(e))
+
+    async def create(self, **data) -> dict:
+        try:
+            return await self.repo.create(**data)
+
+        except common_exc.CreateException as e:
+
+            raise http_exc.HTTPBadRequestException(detail=str(e))
+
+    async def update(self, id: int, **kwargs) -> dict:
+        try:
+            return await self.repo.update(id, **kwargs)
+
+        except common_exc.NotFoundException as e:
+
+            raise http_exc.HTTPNotFoundException(detail=str(e))
+
+        except common_exc.UpdateException as e:
+
+            raise http_exc.HTTPBadRequestException(detail=str(e))
+
+    async def delete(self, id: int) -> None:
+        try:
+            return await self.repo.delete(id)
+
+        except common_exc.NotFoundException as e:
+
+            raise http_exc.HTTPNotFoundException(detail=str(e))
+
+        except common_exc.DeleteException as e:
+
+            raise http_exc.HTTPBadRequestException(detail=str(e))

core/src/app/db/base.py

+from uuid import uuid4
+
+from tortoise import fields, models
+
+
+class IdMixin(models.Model):
+    id = fields.UUIDField(pk=True, default=uuid4)
+
+    class Meta:
+        abstract = True
+
+
+class TimestampMixin(models.Model):
+    created_at = fields.DatetimeField(auto_now_add=True)
+    updated_at = fields.DatetimeField(auto_now=True)
+
+    class Meta:
+        abstract = True
+
+
+class BaseModel(IdMixin, TimestampMixin):
+    class Meta:
+        ordering = ('-created_at', )

core/src/app/db/conf.py

+import os
+
+from fastapi import FastAPI
+from tortoise.contrib.fastapi import register_tortoise
+
+TORTOISE_ORM = {
+    'connections': {'default': os.environ.get('DATABASE_URL')},
+    'apps': {
+        'models': {
+            'models': ['src.app.db.models', 'aerich.models'],
+            'default_connection': 'default',
+        },
+    },
+}
+
+
+def init_db(app: FastAPI) -> None:
+    register_tortoise(
+        app,
+        db_url=os.environ.get('DATABASE_URL'),
+        modules={"models": ["db.models"]},
+        generate_schemas=False,
+        add_exception_handlers=True,
+    )

core/src/app/db/models.py

+from tortoise import fields, models
+
+from .base import BaseModel
+
+
+class Chapter(BaseModel):
+    name = fields.CharField(max_length=100)
+
+    class Meta(BaseModel.Meta):
+        table = 'chapters'
+
+
+class Material(BaseModel):
+    chapter = fields.ForeignKeyField(
+        'models.Chapter', on_delete=fields.CASCADE, related_name='materials'
+    )
+    name = fields.CharField(max_length=100)
+    text = fields.TextField()
+
+    class Meta(BaseModel.Meta):
+        table = 'materials'
+
+
+class UserMaterialView(models.Model):
+    user_id = fields.IntField()
+    material = fields.ForeignKeyField('models.Material', related_name='user_views')
+
+    class Meta:
+        table = 'users_materials'
+
+
+class Test(BaseModel):
+    user_id = fields.IntField()
+    material = fields.ForeignKeyField('models.Material', related_name='material_tests')
+    percent = fields.IntField()
+
+    class Meta:
+        table = 'tests'

core/src/app/db/repositories.py

+import tortoise
+
+from .models import Chapter, Material, UserMaterialView
+from exceptions import common as common_exc
+
+
+class BaseRepository:
+    model: tortoise.Model
+
+    async def get_list(self, **kwargs) -> list[tortoise.Model]:
+        return await self.model.filter(**kwargs)
+
+    async def get(self, id: int) -> tortoise.Model:
+        try:
+            return await self.model.get(id=id)
+
+        except tortoise.exceptions.DoesNotExist as e:
+            raise common_exc.NotFoundException(str(e))
+
+    async def create(self, **kwargs) -> tortoise.Model:
+        try:
+            return await self.model.create(**kwargs)
+
+        except tortoise.exceptions.IntegrityError as e:
+            raise common_exc.CreateException(str(e))
+
+    async def update(self, id: int, **kwargs) -> tortoise.Model:
+        try:
+            instance = await self.get(id=id)
+            await instance.update_from_dict(kwargs).save()
+
+            return instance
+
+        except tortoise.exceptions.IntegrityError as e:
+            raise common_exc.UpdateException(str(e))
+
+    async def delete(self, id: int) -> None:
+        try:
+            instance = await self.get(id=id)
+            await instance.delete()
+
+        except tortoise.exceptions.IntegrityError as e:
+            raise common_exc.DeleteException(str(e))
+
+
+class ChapterRepository(BaseRepository):
+    model = Chapter
+
+
+class MaterialRepository(BaseRepository):
+    model = Material
+
+
+class UserMaterialViewRepository(BaseRepository):
+    model = UserMaterialView

core/src/app/exceptions/common.py

+class NotFoundException(Exception):
+    pass
+
+
+class CreateException(Exception):
+    pass
+
+
+class UpdateException(Exception):
+    pass
+
+
+class DeleteException(Exception):
+    pass

core/src/app/exceptions/handlers.py

+import fastapi
+import pydantic
+from starlette import status
+from fastapi.responses import JSONResponse
+from .http import BaseHTTPException
+
+
+async def query_params_exc_handler(
+        request: fastapi.Request, exc: pydantic.ValidationError,
+) -> JSONResponse:
+    return JSONResponse(
+        {'detail': exc.errors()}, status.HTTP_422_UNPROCESSABLE_ENTITY,
+    )
+
+
+async def request_exc_handler(
+        request: fastapi.Request, exc: BaseHTTPException,
+) -> JSONResponse:
+    return JSONResponse(
+        {'detail': exc.detail}, exc.status_code,
+    )
+
+
+async def internal_exc_handler(
+        request: fastapi.Request, exc: Exception,
+) -> JSONResponse:
+    return JSONResponse(
+        {'detail': 'Internal Server Error'},
+        status.HTTP_500_INTERNAL_SERVER_ERROR,
+    )

core/src/app/exceptions/http.py

+from typing import Any, Dict
+
+from fastapi.exceptions import HTTPException
+from starlette import status
+
+
+class BaseHTTPException(HTTPException):
+    pass
+
+
+class HTTPBadRequestException(BaseHTTPException):
+    def __init__(
+        self, status_code: int = status.HTTP_400_BAD_REQUEST, detail: Any = None,
+        headers: Dict[str, str] | None = None
+    ) -> None:
+        super().__init__(status_code, detail, headers)
+
+
+class HTTPNotFoundException(BaseHTTPException):
+    def __init__(
+        self, status_code: int = status.HTTP_404_NOT_FOUND, detail: Any = None,
+        headers: Dict[str, str] | None = None
+    ) -> None:
+        super().__init__(status_code, detail, headers)

core/src/app/main.py

+import fastapi
+import pydantic
+
+from api.router import router
+from exceptions import handlers as exc_handlers, http as http_exc
+from db.conf import init_db
+
+
+def setup():
+    app = fastapi.FastAPI()
+    app.include_router(router)
+
+    app.exception_handler(pydantic.ValidationError)(exc_handlers.query_params_exc_handler)
+    app.exception_handler(http_exc.BaseHTTPException)(exc_handlers.request_exc_handler)
+    app.exception_handler(500)(exc_handlers.internal_exc_handler)
+
+    return app
+
+
+app = setup()
+
+init_db(app)
+
+if __name__ == '__main__':
+    import uvicorn
+
+    uvicorn.run('main:app', host='0.0.0.0', port=8000, reload=True)

core/src/app/settings.py

+import os
+
+import pydantic
+
+
+database_url = pydantic.PostgresDsn(os.getenv('DATABASE_URL'))

core/src/migrations/models/1_20240113075414_None.py

+from tortoise import BaseDBAsyncClient
+
+
+async def upgrade(db: BaseDBAsyncClient) -> str:
+    return """
+        CREATE TABLE IF NOT EXISTS "basemodel" (
+    "id" UUID NOT NULL  PRIMARY KEY,
+    "created_at" TIMESTAMPTZ NOT NULL  DEFAULT CURRENT_TIMESTAMP,
+    "updated_at" TIMESTAMPTZ NOT NULL  DEFAULT CURRENT_TIMESTAMP
+);
+CREATE TABLE IF NOT EXISTS "chapters" (
+    "id" UUID NOT NULL  PRIMARY KEY,
+    "created_at" TIMESTAMPTZ NOT NULL  DEFAULT CURRENT_TIMESTAMP,
+    "updated_at" TIMESTAMPTZ NOT NULL  DEFAULT CURRENT_TIMESTAMP,
+    "name" VARCHAR(100) NOT NULL
+);
+CREATE TABLE IF NOT EXISTS "materials" (
+    "id" UUID NOT NULL  PRIMARY KEY,
+    "created_at" TIMESTAMPTZ NOT NULL  DEFAULT CURRENT_TIMESTAMP,
+    "updated_at" TIMESTAMPTZ NOT NULL  DEFAULT CURRENT_TIMESTAMP,
+    "name" VARCHAR(100) NOT NULL,
+    "text" TEXT NOT NULL,
+    "chapter_id" UUID NOT NULL REFERENCES "chapters" ("id") ON DELETE CASCADE
+);
+CREATE TABLE IF NOT EXISTS "aerich" (
+    "id" SERIAL NOT NULL PRIMARY KEY,
+    "version" VARCHAR(255) NOT NULL,
+    "app" VARCHAR(100) NOT NULL,
+    "content" JSONB NOT NULL
+);"""
+
+
+async def downgrade(db: BaseDBAsyncClient) -> str:
+    return """
+        """

core/src/migrations/models/2_20240113094112_update.py

+from tortoise import BaseDBAsyncClient
+
+
+async def upgrade(db: BaseDBAsyncClient) -> str:
+    return """
+        CREATE TABLE IF NOT EXISTS "users_materials" (
+    "id" SERIAL NOT NULL PRIMARY KEY,
+    "user_id" INT NOT NULL,
+    "material_id" UUID NOT NULL REFERENCES "materials" ("id") ON DELETE CASCADE
+);"""
+
+
+async def downgrade(db: BaseDBAsyncClient) -> str:
+    return """
+        DROP TABLE IF EXISTS "users_materials";"""

core/src/migrations/models/3_20240113120835_update.py

+from tortoise import BaseDBAsyncClient
+
+
+async def upgrade(db: BaseDBAsyncClient) -> str:
+    return """
+        CREATE TABLE IF NOT EXISTS "tests" (
+    "id" UUID NOT NULL  PRIMARY KEY,
+    "created_at" TIMESTAMPTZ NOT NULL  DEFAULT CURRENT_TIMESTAMP,
+    "updated_at" TIMESTAMPTZ NOT NULL  DEFAULT CURRENT_TIMESTAMP,
+    "user_id" INT NOT NULL,
+    "percent" INT NOT NULL,
+    "material_id" UUID NOT NULL REFERENCES "materials" ("id") ON DELETE CASCADE
+);"""
+
+
+async def downgrade(db: BaseDBAsyncClient) -> str:
+    return """
+        DROP TABLE IF EXISTS "tests";"""