Django Alert Thresholds

A reusable Django package for managing multi-level alert thresholds with support for different metrics, operators, and alert levels (Info, Warning, Critical, Emergency).

Installation

From Git (Private Repository)

pip install django-multi-level-alerts

From Local Path (Development)

pip install -e /path/to/alert_thresholds

Quick Start

1. Add to INSTALLED_APPS

# settings.py
INSTALLED_APPS = [
    ...
    'alert_thresholds',
    ...
]

2. Run Migrations

python manage.py migrate alert_thresholds

3. Configure Metrics

# settings.py (or separate config file)
ALERT_THRESHOLDS = {
    'metrics': {
        'max_price_diff_pct': {
            'label': 'Max Price Difference %',
            'default_operator': 'gte',  # >=
            'description': 'Alert when price difference exceeds threshold',
            'models': ['myapp.MyModel'],
        },
        'min_balance': {
            'label': 'Minimum Balance',
            'default_operator': 'lt',  # <
            'description': 'Alert when balance drops below threshold',
            'models': ['myapp.Account'],
        },
    },
    'auto_create_thresholds': True,
}

4. Add Mixin to Models

# models.py
from django.db import models
from alert_thresholds.mixins import AlertThresholdMixin

class Account(AlertThresholdMixin, models.Model):
    name = models.CharField(max_length=100)
    balance = models.DecimalField(max_digits=20, decimal_places=2)

5. Add Mixin to Admin

# admin.py
from django.contrib import admin
from alert_thresholds.admin import AlertThresholdAdminMixin
from .models import Account

@admin.register(Account)
class AccountAdmin(AlertThresholdAdminMixin, admin.ModelAdmin):
    list_display = ['name', 'balance']

Usage in Code

Check if Threshold is Exceeded

from alert_thresholds.choices import AlertLevel

account = Account.objects.get(pk=1)

# Check threshold and get highest triggered level
alert_level = account.check_threshold_exceeded(
    metric_code='min_balance',
    current_value=account.balance
)

if alert_level == AlertLevel.EMERGENCY:
    send_emergency_alert(account)
elif alert_level == AlertLevel.CRITICAL:
    send_critical_alert(account)

Get Threshold Values

# Get specific threshold
emergency_threshold = account.get_threshold('min_balance', AlertLevel.EMERGENCY)

# Get all thresholds for a metric
thresholds = account.get_thresholds_for_metric('min_balance')
# Returns: {'info': 1000, 'warning': 500, 'critical': 100, 'emergency': 50}

Available Operators

Operator	Code	Description
Greater Than	gt	value > threshold
Greater Than or Equal	gte	value >= threshold
Less Than	lt	value < threshold
Less Than or Equal	lte	value <= threshold
Equal	eq	value == threshold
Not Equal	ne	value != threshold

Alert Levels

Level	Value	Use Case
Info	1	Informational, no action needed
Warning	2	Attention needed soon
Critical	3	Immediate attention required
Emergency	4	Critical system failure

Management Commands

Sync Metrics from Settings

python manage.py sync_alert_metrics

This is automatically run after migrate, but can be run manually if needed.

Configuration Options

Option	Type	Default	Description
metrics	dict	{}	Metric definitions
auto_create_thresholds	bool	True	Auto-create threshold records in admin

License

MIT