django-extra-tools 0.3.0

parse_datetime

Parse datetime from string.

{% load parse %}

{{ string_datetime|parse_datetime|date:"Y-m-d H:i" }}

parse_date

Parse date from string.

{% load parse %}

{{ string_date|parse_date|date:"Y-m-d" }}

parse_time

Parse time from string.

{% load parse %}

{{ string_time|parse_time|date:"H:i" }}

parse_duration

Parse duration (timedelta) from string.

{% load parse %}

{{ string_duration|parse_duration }}

First

Returns the first non-NULL item.

from django_extra_tools.db.models.aggregates import First

Table.objects.aggregate(First('col1', order_by='col2'))

Last

Returns the last non-NULL item.

from django_extra_tools.db.models.aggregates import Last

Table.objects.aggregate(Last('col1', order_by='col2'))

Median

Returns median value.

from django_extra_tools.db.models.aggregates import Median

Table.objects.aggregate(Median('col1'))

StringAgg

Combines the values as the text. Fields are separated by a “separator”.

from django_extra_tools.db.models.aggregates import StringAgg

Table.objects.aggregate(StringAgg('col1'))

CreatedAtMixin

Add created_at field to model.

from django.db import models
from django_extra_tools.db.models import timestampable

class MyModel(timestampable.CreatedAtMixin, models.Model):
    pass

model = MyModel()
print(model.created_at)

CreatedByMixin

Add created_by field to model.

from django.contrib.auth.models import User
from django.db import models
from django_extra_tools.db.models import timestampable

class MyModel(timestampable.CreatedByMixin, models.Model):
    pass

user = User.objects.get(username='user')
model = MyModel(created_by=user)
print(model.created_by)

UpdatedAtMixin

Add updated_at field to model.

from django.db import models
from django_extra_tools.db.models import timestampable

class MyModel(timestampable.UpdatedAtMixin, models.Model):
    operation = models.CharField(max_length=10)

model = MyModel()
print(model.updated_at)
model.operation = 'update'
model.save()
print(model.updated_at)

UpdatedByMixin

Add updated_by field to model.

from django.contrib.auth.models import User
from django.db import models
from django_extra_tools.db.models import timestampable

class MyModel(timestampable.UpdatedByMixin, models.Model):
    operation = models.CharField(max_length=10)

user = User.objects.get(username='user')
model = MyModel()
print(model.updated_by)
model.operation = 'update'
model.save_by(user)
print(model.updated_by)

DeletedAtMixin

Add deleted_at field to model.

from django.db import models
from django_extra_tools.db.models import timestampable

class MyModel(timestampable.DeletedAtMixin, models.Model):
    pass

model = MyModel()
print(model.deleted_at)
model.delete()
print(model.deleted_at)

DeletedByMixin

Add deleted_by field to model.

from django.contrib.auth.models import User
from django.db import models
from django_extra_tools.db.models import timestampable

class MyModel(timestampable.DeletedByMixin, models.Model):
    pass

user = User.objects.get(username='user')
model = MyModel()
print(model.deleted_by)
model.delete_by(user)
print(model.deleted_by)

CreatedMixin

Add created_at and created_by fields to model.

UpdatedMixin

Add updated_at and updated_by fields to model.

DeletedMixin

Add deleted_at and deleted_by fields to model.

batch_qs

Returns a (start, end, total, queryset) tuple for each batch in the given queryset.

from django_extra_tools.db.models import batch_qs

qs = Table.objects.all()
start, end, total, queryset = batch_qs(qs, 10)

pg_version

Return tuple with PostgreSQL version of a specific connection.

from django_extra_tools.db.models import pg_version

version = pg_version()

OneInstanceCommand

A management command which will be run only one instance of command with name name. No other command with name name can not be run in the same time.

from django_extra_tools.management import OneInstanceCommand

class Command(OneInstanceCommand):
    name = 'mycommand'

    def handle_instance(self, *args, **options):
        # some operations

NagiosCheckCommand

A management command which perform a Nagios check.

from django_extra_tools.management import NagiosCheckCommand

class Command(NagiosCheckCommand):
    def handle_nagios_check(self, *args, **options):
        return self.STATE_OK, 'OK'