468 lines
18 KiB
Python
468 lines
18 KiB
Python
from __future__ import annotations
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from typing import Any, List
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from django.contrib.auth import get_user_model
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from django.contrib.contenttypes.models import ContentType
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from django.db.models import (
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BooleanField,
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Count,
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Exists,
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F,
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OuterRef,
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Subquery,
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Value,
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)
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from rest_framework import filters, status, viewsets
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from rest_framework.decorators import action
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from rest_framework.parsers import (
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FormParser,
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JSONParser,
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MultiPartParser,
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)
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from rest_framework.permissions import IsAdminUser, IsAuthenticated
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from rest_framework.response import Response
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from employees.constants import DeptPerm
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from feed.constants import TYPE_COMPANY, TYPE_DEPARTMENT
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from feed.models import Post, PostLike
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from feed.notifications import notify_post_reaction
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from ..permissions import (
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AdminOrActionOrModelPerms,
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AdminOrDeptAllowed,
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can_publish_department_posts,
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)
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from .serializers import PostLikerSerializer, PostListSerializer, PostSerializer
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Employee = get_user_model()
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def _to_id(val):
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if val is None:
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return None
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if isinstance(val, int):
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return val
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if hasattr(val, "id"):
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return getattr(val, "id")
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try:
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return int(str(val))
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except (TypeError, ValueError):
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return None
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class PostViewSet(viewsets.ModelViewSet):
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"""CRUD ленты + like/unlike, pin/unpin.
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Доступ (коротко):
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- list/retrieve/like/unlike — IsAuthenticated
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- create:
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* type=company → AdminOrActionOrModelPerms
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+ required_perm_code="feed.publish_company_post"
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* type=department → staff/superuser, руководитель отдела,
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активный участник отдела или любой сотрудник
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с активной ролью в этом отделе
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- update/partial_update/destroy:
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* company → как для company-create
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* department → как для department-create
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- pin/unpin — только staff/superuser
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"""
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queryset = Post.objects.select_related("author", "department").order_by(
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"-pinned_global", "-created_at"
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)
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parser_classes = [MultiPartParser, FormParser, JSONParser]
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filter_backends = [filters.SearchFilter, filters.OrderingFilter]
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search_fields = ["title", "body"]
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ordering_fields = [
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"created_at",
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"pinned_global",
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"pinned_department",
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"likes_count",
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]
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ordering = ["-pinned_global", "-created_at"]
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class PostDeptPerm(AdminOrDeptAllowed):
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"""Департаментные права для операций над постами отдела.
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SAFE-методы разрешены (IsAuthenticated стоит на вьюхе).
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Коды прав подставляются динамически из get_permissions().
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"""
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allow_safe_without_code = True
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def has_permission(self, request, view) -> bool:
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"""На create, если type=department, но department не указан,
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не режем запрос — даём сериализатору вернуть 400 вместо 403.
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"""
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if getattr(view, "action", None) == "create":
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t = (request.data.get("type") or "").strip()
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if t == TYPE_DEPARTMENT:
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dept_id = self._to_int_or_none(
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self._extract_dept_id_from_request(request, view)
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)
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if dept_id is None:
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return True # пропускаем к валидации сериализатора
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return super().has_permission(request, view)
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class DepartmentPostCreatePerm(IsAuthenticated):
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"""Упрощённое право на создание новости отдела."""
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def has_permission(self, request, view) -> bool:
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if not super().has_permission(request, view):
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return False
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dept_id = _to_id(
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request.data.get("department") or request.data.get("department_id")
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)
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if dept_id is None:
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# Даём сериализатору вернуть 400 по отсутствующему отделу.
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return True
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return can_publish_department_posts(request.user, dept_id)
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def get_permissions(self) -> List[Any]:
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"""Возвращает DRF-пермишены под текущий action.
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Без вызова get_object().
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"""
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if self.action in {"list", "retrieve", "like", "unlike"}:
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return [IsAuthenticated()]
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if self.action in {"pin", "unpin"}:
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return [IsAdminUser()]
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# --- CREATE: смотрим на тип из тела запроса ---
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if self.action == "create":
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t = (self.request.data.get("type") or "").strip()
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if t == TYPE_COMPANY:
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return [IsAuthenticated(), AdminOrActionOrModelPerms()]
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if t == TYPE_DEPARTMENT:
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return [self.DepartmentPostCreatePerm()]
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return [IsAuthenticated()]
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# --- UPDATE/PATCH/DELETE: определяем тип поста из БД,
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# но без get_object() ---
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if self.action in {"update", "partial_update", "destroy"}:
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lookup = getattr(self, "lookup_url_kwarg", None) or getattr(
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self, "lookup_field", "pk"
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)
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pk = self.kwargs.get(lookup)
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info = (
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Post.objects.filter(pk=pk).values("type", "department_id").first() or {}
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)
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if info.get("type") == TYPE_COMPANY:
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return [IsAuthenticated(), AdminOrActionOrModelPerms()]
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# department
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dept_code = DeptPerm.MANAGE_FEED
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perm = self.PostDeptPerm()
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perm.required_code_map = {
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"update": dept_code,
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"partial_update": dept_code,
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"destroy": dept_code,
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}
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return [IsAuthenticated(), perm]
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# дефолт: просто аутентификация
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return [IsAuthenticated()]
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def get_serializer_class(self):
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return PostListSerializer if self.action == "list" else PostSerializer
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def get_serializer_context(self):
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context = super().get_serializer_context()
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context["pin_scope"] = self._resolve_pin_scope()
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return context
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def _resolve_pin_scope(self, post: Post | None = None) -> str:
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request_data = (
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self.request.data if self.request.method not in {"GET", "HEAD"} else {}
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)
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scope = (
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self.request.query_params.get("pin_scope")
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or self.request.query_params.get("scope")
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or request_data.get("scope")
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or ""
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).strip()
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if scope in {"global", "department"}:
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return scope
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post_type = (self.request.query_params.get("type") or "").strip()
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department_id = _to_id(self.request.query_params.get("department"))
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if post_type == TYPE_DEPARTMENT and department_id is not None:
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return "department"
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if post is not None and getattr(post, "type", None) == TYPE_DEPARTMENT:
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return "department"
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return "global"
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def get_queryset(self):
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qs = super().get_queryset()
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user = self.request.user
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# Аннотируем счётчик комментариев через communications.Chat
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from communications.models import Message
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# ContentType для Post
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post_ct = ContentType.objects.get_for_model(Post)
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# Подсчёт сообщений в чате комментариев для каждого поста
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comments_subquery = (
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Message.objects.filter(
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chat__type="comments",
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chat__context_content_type=post_ct,
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chat__context_object_id=OuterRef("pk"),
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)
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.values("chat")
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.annotate(count=Count("id"))
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.values("count")
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)
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qs = qs.annotate(comments_count=Subquery(comments_subquery))
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if user.is_authenticated:
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qs = qs.annotate(
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is_liked=Exists(PostLike.objects.filter(post=OuterRef("pk"), user=user))
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)
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else:
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qs = qs.annotate(is_liked=Value(False, output_field=BooleanField()))
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# фильтры
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qp = self.request.query_params
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t = qp.get("type")
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if t:
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qs = qs.filter(type=t)
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dept_id = _to_id(qp.get("department"))
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if dept_id is not None:
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qs = qs.filter(department_id=dept_id)
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author_id = _to_id(qp.get("author"))
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if author_id is not None:
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qs = qs.filter(author_id=author_id)
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pin_scope = self._resolve_pin_scope()
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pinned_field = (
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"pinned_department" if pin_scope == "department" else "pinned_global"
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)
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pinned = qp.get("pinned")
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if pinned in ("true", "1"):
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qs = qs.filter(**{pinned_field: True})
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elif pinned in ("false", "0"):
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qs = qs.filter(**{pinned_field: False})
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if pin_scope == "department" and dept_id is not None:
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qs = qs.order_by("-pinned_department", "-created_at")
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else:
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qs = qs.order_by("-pinned_global", "-created_at")
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return qs
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def list(self, request, *args, **kwargs):
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"""Возвращает список постов."""
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queryset = self.filter_queryset(self.get_queryset())
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page = self.paginate_queryset(queryset)
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objects = page if page is not None else queryset
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serializer = self.get_serializer(objects, many=True)
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if page is not None:
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return self.get_paginated_response(serializer.data)
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return Response(serializer.data)
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# --- ВАЖНО: возвращаем perform_create, чтобы заполнить author ---
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def perform_create(self, serializer: PostSerializer) -> None:
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"""Сохраняет пост, проставляя автора текущим пользователем.
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Raises:
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ValidationError: если сериализатор невалиден (обрабатывается DRF).
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"""
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serializer.save(author=self.request.user)
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# --- actions (pin/unpin и лайки) ---
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@action(detail=True, methods=["post"], permission_classes=[IsAdminUser])
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def pin(self, request, pk=None):
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"""Пинует пост (только staff/superuser)."""
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post = self.get_object()
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scope = self._resolve_pin_scope(post=post)
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if scope == "department":
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if post.type != TYPE_DEPARTMENT or post.department_id is None:
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return Response(
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{
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"detail": "Закрепление в ленте отдела доступно только для публикаций отдела."
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},
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status=status.HTTP_400_BAD_REQUEST,
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)
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if not post.pinned_department:
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Post.objects.filter(pk=post.pk).update(pinned_department=True)
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return Response(
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{
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"scope": "department",
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"pinned": True,
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"pinned_global": bool(post.pinned_global),
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"pinned_department": True,
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}
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)
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if not post.pinned_global:
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Post.objects.filter(pk=post.pk).update(pinned_global=True)
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return Response(
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{
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"scope": "global",
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"pinned": True,
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"pinned_global": True,
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"pinned_department": bool(post.pinned_department),
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}
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)
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@action(detail=True, methods=["post"], permission_classes=[IsAdminUser])
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def unpin(self, request, pk=None):
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"""Снимает пин (только staff/superuser)."""
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post = self.get_object()
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scope = self._resolve_pin_scope(post=post)
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if scope == "department":
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if post.type != TYPE_DEPARTMENT or post.department_id is None:
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return Response(
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{
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"detail": "Закрепление в ленте отдела доступно только для публикаций отдела."
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},
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status=status.HTTP_400_BAD_REQUEST,
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)
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if post.pinned_department:
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Post.objects.filter(pk=post.pk).update(pinned_department=False)
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return Response(
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{
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"scope": "department",
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"pinned": False,
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"pinned_global": bool(post.pinned_global),
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"pinned_department": False,
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}
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)
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if post.pinned_global:
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Post.objects.filter(pk=post.pk).update(pinned_global=False)
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return Response(
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{
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"scope": "global",
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"pinned": False,
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"pinned_global": False,
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"pinned_department": bool(post.pinned_department),
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}
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)
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@action(detail=True, methods=["post"], permission_classes=[IsAuthenticated])
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def like(self, request, pk=None):
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"""Ставит лайк текущего пользователя (идемпотентно)."""
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post = self.get_object()
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_, created = PostLike.objects.get_or_create(post=post, user=request.user)
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if created:
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Post.objects.filter(pk=post.pk).update(likes_count=F("likes_count") + 1)
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# Отправляем уведомление автору публикации
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notify_post_reaction(post, request.user)
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post.refresh_from_db(fields=["likes_count"])
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return Response(
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{"liked": True, "likes_count": post.likes_count},
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status=status.HTTP_200_OK,
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)
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@action(detail=True, methods=["post"], permission_classes=[IsAuthenticated])
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def unlike(self, request, pk=None):
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"""Снимает лайк текущего пользователя (идемпотентно)."""
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post = self.get_object()
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deleted, _ = PostLike.objects.filter(post=post, user=request.user).delete()
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if deleted:
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Post.objects.filter(pk=post.pk, likes_count__gt=0).update(
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likes_count=F("likes_count") - 1
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)
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post.refresh_from_db(fields=["likes_count"])
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return Response(
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{"liked": False, "likes_count": post.likes_count},
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status=status.HTTP_200_OK,
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)
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@action(detail=True, methods=["get"], permission_classes=[IsAuthenticated])
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def likers(self, request, pk=None):
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"""Возвращает список сотрудников, поставивших лайк посту."""
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post = self.get_object()
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queryset = (
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Employee.objects.filter(post_likes__post=post)
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.order_by("-post_likes__created_at", "-id")
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.distinct()
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)
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page = self.paginate_queryset(queryset)
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objects = page if page is not None else queryset
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serializer = PostLikerSerializer(
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objects,
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many=True,
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context={"request": request},
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)
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if page is not None:
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return self.get_paginated_response(serializer.data)
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return Response(serializer.data)
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@action(
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detail=True,
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methods=["get", "post"],
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permission_classes=[IsAuthenticated],
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)
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def comments(self, request, pk=None):
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"""Управление комментариями к посту.
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GET: получение списка комментариев
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POST: создание комментария {"text": "..."}
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"""
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from communications import comments_helpers
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from ..employees.serializers import EmployeeBriefSerializer
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post = self.get_object()
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if request.method in {"GET", "HEAD"}:
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# Получаем комментарии через unified system
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messages = comments_helpers.get_comments(post)
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# Форматируем в формат, совместимый со старым API
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comments_data = []
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for msg in messages:
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author_ser = EmployeeBriefSerializer(msg.author)
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comments_data.append(
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{
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"id": msg.id,
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"post": post.id,
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"post_id": post.id,
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"author": author_ser.data,
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"author_id": msg.author.id if msg.author else None,
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"text": msg.content,
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"created_at": msg.created_at,
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"created_at_display": msg.created_at.strftime("%d.%m.%Y %H:%M"),
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}
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)
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return Response(comments_data)
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# POST - создание комментария
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text = request.data.get("text", "").strip()
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if not text:
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return Response(
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{"text": ["Это поле не может быть пустым."]},
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status=status.HTTP_400_BAD_REQUEST,
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)
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# Создаём комментарий через unified system
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message = comments_helpers.create_comment(
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obj=post, author=request.user, content=text
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)
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# Форматируем ответ
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author_ser = EmployeeBriefSerializer(message.author)
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response_data = {
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"id": message.id,
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"post": post.id,
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"post_id": post.id,
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"author": author_ser.data,
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"author_id": message.author.id if message.author else None,
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"text": message.content,
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"created_at": message.created_at,
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"created_at_display": message.created_at.strftime("%d.%m.%Y %H:%M"),
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}
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return Response(response_data, status=status.HTTP_201_CREATED)
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