django-pg-upsert's Introduction

django-pg-upsert

Support Postgres native upsert (INSERT ... ON CONFLICT) for django

Installation

pip install django-pg-upsert

Usage

As a manager

import django_pg_upsert

from django.db import models

class Pet(models.Model):
    name = models.CharField(max_length=30, unique=True)
    age = models.PositiveIntegerField()

    objects = PgUpsertManager()


Pet.objects.insert_conflict(data={"name": "dog", "age": 12})

# second query don't insert record to db and don't raise error
Pet.objects.insert_conflict(data={"name": "dog", "age": 20})

# This code produce SQL statement

[
  'INSERT INTO "pets" ("name", "age") VALUES (%s, %s) ON CONFLICT DO NOTHING',
  ("dog", 12),
]

Explicit constraint name

Pet.objects.insert_conflict(
  data={"name": "dog", "age": 12},
  constraint="pet_name_uniq"
)

[
  'INSERT INTO "pets" ("name", "age") VALUES (%s, %s) ON CONSTRAINT pet_name_uniq DO NOTHING',
  ("dog", 12),
]

Using field names

Pet.objects.insert_conflict(
  data={"name": "dog", "age": 12},
  fields=["name"]
)

[
  'INSERT INTO "pets" ("name", "age") VALUES (%s, %s) ON CONSTRAINT ("name") DO NOTHING',
  ("dog", 12),
]

As a standalone function

import django_pg_upsert

pet = Pet(name='dog', age='12')

django_pg_upsert.insert_conflict(pet)
django_pg_upsert.insert_conflict(pet, constraint='pet_name_uniq')
django_pg_upsert.insert_conflict(pet, fields='name')

Update

Pet.objects.insert_conflict(
  data={"name": "dog", "age": 100},
  fields=["name"],
  update=["age"]
)

django_pg_upsert.insert_conflict(pet, fields='name', update=["age"])

[
  'INSERT INTO "pets" ("name", "age") VALUES (%s, %s) ON CONFLICT ("name") DO UPDATE SET age = EXCLUDED.age',
  ("dog", 100),
]

Motivation

django-postgres-extra has a pg upsert method as well, but this package requires redefinition for DB backed in Django settings which sometimes is not possible.

django-pg-upsert is designed to solve only one problem (depends only from django) and is not a Swiss knife.

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