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Eager load get_posts for submission_listings.

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Ported in logic from upstream to use SQLAlchemy eager loading instead
of repeated queries when building a submission_listing. Adjusted
loaded relationships to include only those used on TheMotte.

Using test data from seed_db, before and after:

GET /
|----------|--------|--------|--------|--------|--------|------------|
| Database | SELECT | INSERT | UPDATE | DELETE | Totals | Duplicates |
|----------|--------|--------|--------|--------|--------|------------|
| default  |   83   |   0    |   0    |   0    |   83   |     72     |
|----------|--------|--------|--------|--------|--------|------------|
Total queries: 83 in 0.031s

GET /
|----------|--------|--------|--------|--------|--------|------------|
| Database | SELECT | INSERT | UPDATE | DELETE | Totals | Duplicates |
|----------|--------|--------|--------|--------|--------|------------|
| default  |   14   |   0    |   0    |   0    |   14   |     0      |
|----------|--------|--------|--------|--------|--------|------------|
Total queries: 14 in 0.00718s
This commit is contained in:
TLSM 2022-11-28 12:55:31 -05:00
parent 9953c5763c
commit 4d22d9bce2
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5 changed files with 24 additions and 10 deletions
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4
files/classes/badges.py
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@ -33,7 +33,9 @@ class Badge(Base):
Index('badges_badge_id_idx', badge_id)
user = relationship("User", viewonly=True)
badge = relationship("BadgeDef", primaryjoin="foreign(Badge.badge_id) == remote(BadgeDef.id)", viewonly=True)
badge = relationship("BadgeDef",
primaryjoin="foreign(Badge.badge_id) == remote(BadgeDef.id)",
lazy="joined", innerjoin=True, viewonly=True)
def __repr__(self):
return f"<Badge(user_id={self.user_id}, badge_id={self.badge_id})>"