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Rework post/event querysets to always fetch stuff

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This commit is contained in:
Andrew Godwin 2022-12-24 10:50:01 -07:00
parent a6c973337c
commit 087cb2a15f
4 changed files with 92 additions and 110 deletions
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4
activities/models/post_interaction.py
View file

@ -20,6 +20,10 @@ class PostInteractionStates(StateGraph):
fanned_out.transitions_to(undone)
undone.transitions_to(undone_fanned_out)
@classmethod
def group_active(cls):
return [cls.new, cls.fanned_out]
@classmethod
async def handle_new(cls, instance: "PostInteraction"):
"""

47
activities/services/post.py
View file

@ -1,4 +1,4 @@
from typing import cast
from django.db import models
from activities.models import Post, PostInteraction, PostInteractionStates, PostStates
from users.models import Identity
@ -21,10 +21,7 @@ class PostService:
identity=identity,
post=self.post,
)[0]
if interaction.state in [
PostInteractionStates.undone,
PostInteractionStates.undone_fanned_out,
]:
if interaction.state not in PostInteractionStates.group_active():
interaction.transition_perform(PostInteractionStates.new)
def uninteract_as(self, identity, type):
@ -50,6 +47,40 @@ class PostService:
def unboost_as(self, identity: Identity):
self.uninteract_as(identity, PostInteraction.Types.boost)
@classmethod
def queryset(cls):
"""
Returns the base queryset to use for fetching posts efficiently.
"""
return (
Post.objects.not_hidden()
.prefetch_related(
"attachments",
"mentions",
"emojis",
)
.select_related(
"author",
"author__domain",
)
.annotate(
like_count=models.Count(
"interactions",
filter=models.Q(
interactions__type=PostInteraction.Types.like,
interactions__state__in=PostInteractionStates.group_active(),
),
),
boost_count=models.Count(
"interactions",
filter=models.Q(
interactions__type=PostInteraction.Types.boost,
interactions__state__in=PostInteractionStates.group_active(),
),
),
)
)
def context(self, identity: Identity | None) -> tuple[list[Post], list[Post]]:
"""
Returns ancestor/descendant information.
@ -66,7 +97,7 @@ class PostService:
ancestors: list[Post] = []
ancestor = self.post
while ancestor.in_reply_to and len(ancestors) < num_ancestors:
ancestor = cast(Post, ancestor.in_reply_to_post())
ancestor = self.queryset().get(object_uri=ancestor.in_reply_to)
if ancestor is None:
break
if ancestor.state in [PostStates.deleted, PostStates.deleted_fanned_out]:
@ -78,10 +109,8 @@ class PostService:
while queue and len(descendants) < num_descendants:
node = queue.pop()
child_queryset = (
Post.objects.not_hidden()
self.queryset()
.filter(in_reply_to=node.object_uri)
.select_related("author", "author__domain")
.prefetch_related("emojis")
.order_by("published")
)
if identity:

130
activities/services/timeline.py
View file

@ -1,6 +1,13 @@
from django.db import models
from activities.models import Hashtag, Post, PostInteraction, TimelineEvent
from activities.models import (
Hashtag,
Post,
PostInteraction,
PostInteractionStates,
TimelineEvent,
)
from activities.services import PostService
from users.models import Identity
@ -12,13 +19,10 @@ class TimelineService:
def __init__(self, identity: Identity | None):
self.identity = identity
def home(self) -> models.QuerySet[TimelineEvent]:
@classmethod
def event_queryset(cls):
return (
TimelineEvent.objects.filter(
identity=self.identity,
type__in=[TimelineEvent.Types.post, TimelineEvent.Types.boost],
)
.select_related(
TimelineEvent.objects.select_related(
"subject_post",
"subject_post__author",
"subject_post__author__domain",
@ -37,113 +41,60 @@ class TimelineService:
like_count=models.Count(
"subject_post__interactions",
filter=models.Q(
subject_post__interactions__type=PostInteraction.Types.like
subject_post__interactions__type=PostInteraction.Types.like,
subject_post__interactions__state__in=PostInteractionStates.group_active(),
),
),
boost_count=models.Count(
"subject_post__interactions",
filter=models.Q(
subject_post__interactions__type=PostInteraction.Types.boost
subject_post__interactions__type=PostInteraction.Types.boost,
subject_post__interactions__state__in=PostInteractionStates.group_active(),
),
),
)
)
def home(self) -> models.QuerySet[TimelineEvent]:
return (
self.event_queryset()
.filter(
identity=self.identity,
type__in=[TimelineEvent.Types.post, TimelineEvent.Types.boost],
)
.order_by("-published")
)
def local(self) -> models.QuerySet[Post]:
return (
Post.objects.local_public()
.not_hidden()
PostService.queryset()
.local_public()
.filter(author__restriction=Identity.Restriction.none)
.select_related("author", "author__domain")
.prefetch_related("attachments", "mentions", "emojis")
.annotate(
like_count=models.Count(
"interactions",
filter=models.Q(interactions__type=PostInteraction.Types.like),
),
boost_count=models.Count(
"interactions",
filter=models.Q(interactions__type=PostInteraction.Types.boost),
),
)
.order_by("-published")
)
def federated(self) -> models.QuerySet[Post]:
return (
Post.objects.public()
.not_hidden()
PostService.queryset()
.public()
.filter(author__restriction=Identity.Restriction.none)
.select_related("author", "author__domain")
.prefetch_related("attachments", "mentions", "emojis")
.annotate(
like_count=models.Count(
"interactions",
filter=models.Q(interactions__type=PostInteraction.Types.like),
),
boost_count=models.Count(
"interactions",
filter=models.Q(interactions__type=PostInteraction.Types.boost),
),
)
.order_by("-published")
)
def hashtag(self, hashtag: str | Hashtag) -> models.QuerySet[Post]:
return (
Post.objects.public()
.not_hidden()
PostService.queryset()
.public()
.filter(author__restriction=Identity.Restriction.none)
.tagged_with(hashtag)
.select_related("author", "author__domain")
.prefetch_related("attachments", "mentions")
.annotate(
like_count=models.Count(
"interactions",
filter=models.Q(interactions__type=PostInteraction.Types.like),
),
boost_count=models.Count(
"interactions",
filter=models.Q(interactions__type=PostInteraction.Types.boost),
),
)
.order_by("-published")
)
def notifications(self, types: list[str]) -> models.QuerySet[TimelineEvent]:
return (
TimelineEvent.objects.filter(identity=self.identity, type__in=types)
self.event_queryset()
.filter(identity=self.identity, type__in=types)
.order_by("-published")
.select_related(
"subject_post",
"subject_post__author",
"subject_post__author__domain",
"subject_identity",
"subject_identity__domain",
"subject_post_interaction",
"subject_post_interaction__identity",
"subject_post_interaction__identity__domain",
)
.prefetch_related(
"subject_post__emojis",
"subject_post__mentions",
"subject_post__attachments",
)
.annotate(
like_count=models.Count(
"subject_post__interactions",
filter=models.Q(
subject_post__interactions__type=PostInteraction.Types.like
),
),
boost_count=models.Count(
"subject_post__interactions",
filter=models.Q(
subject_post__interactions__type=PostInteraction.Types.boost
),
),
)
)
def identity_public(self, identity: Identity):
@ -151,21 +102,8 @@ class TimelineService:
Returns all publically visible posts for an identity
"""
return (
identity.posts.not_hidden()
PostService.queryset()
.filter(author=identity)
.unlisted(include_replies=True)
.select_related("author")
.prefetch_related("attachments")
.select_related("author", "author__domain")
.prefetch_related("attachments", "mentions")
.annotate(
like_count=models.Count(
"interactions",
filter=models.Q(interactions__type=PostInteraction.Types.like),
),
boost_count=models.Count(
"interactions",
filter=models.Q(interactions__type=PostInteraction.Types.boost),
),
)
.order_by("-created")
)

21
activities/views/posts.py
View file

@ -25,7 +25,10 @@ class Individual(TemplateView):
self.identity = by_handle_or_404(self.request, handle, local=False)
if self.identity.blocked:
raise Http404("Blocked user")
self.post_obj = get_object_or_404(self.identity.posts, pk=post_id)
self.post_obj = get_object_or_404(
PostService.queryset().filter(author=self.identity),
pk=post_id,
)
if self.post_obj.state in [PostStates.deleted, PostStates.deleted_fanned_out]:
raise Http404("Deleted post")
# If they're coming in looking for JSON, they want the actor
@ -73,13 +76,16 @@ class Like(View):
def post(self, request, handle, post_id):
identity = by_handle_or_404(self.request, handle, local=False)
post = get_object_or_404(
identity.posts.prefetch_related("attachments"), pk=post_id
PostService.queryset().filter(author=identity),
pk=post_id,
)
service = PostService(post)
if self.undo:
service.unlike_as(self.request.identity)
service.unlike_as(request.identity)
post.like_count = max(0, post.like_count - 1)
else:
service.like_as(self.request.identity)
service.like_as(request.identity)
post.like_count += 1
# Return either a redirect or a HTMX snippet
if request.htmx:
return render(
@ -103,12 +109,17 @@ class Boost(View):
def post(self, request, handle, post_id):
identity = by_handle_or_404(self.request, handle, local=False)
post = get_object_or_404(identity.posts, pk=post_id)
post = get_object_or_404(
PostService.queryset().filter(author=identity),
pk=post_id,
)
service = PostService(post)
if self.undo:
service.unboost_as(request.identity)
post.boost_count = max(0, post.boost_count - 1)
else:
service.boost_as(request.identity)
post.boost_count += 1
# Return either a redirect or a HTMX snippet
if request.htmx:
return render(