First version

backend/app/admin.py

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+from django.contrib import admin
+from app.models import Order, Waiter, Meal
+
+# Register your models here.
+
+admin.site.register([Meal, Order, Waiter])

backend/app/apps.py

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+from django.apps import AppConfig
+
+
+class AppConfig(AppConfig):
+    default_auto_field = 'django.db.models.BigAutoField'
+    name = 'app'

backend/app/consumers.py

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+from channels.db import database_sync_to_async
+from channels.generic.websocket import AsyncJsonWebsocketConsumer
+from django.urls import reverse

backend/app/migrations/0001_initial.py

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+# Generated by Django 5.1.4 on 2024-12-12 14:12
+
+import django.db.models.deletion
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    initial = True
+
+    dependencies = [
+    ]
+
+    operations = [
+        migrations.CreateModel(
+            name='Waiter',
+            fields=[
+                ('id', models.BigAutoField(auto_created=True, primary_key=True, serialize=False, verbose_name='ID')),
+                ('name', models.CharField(max_length=120, verbose_name='Imię i nazwisko')),
+            ],
+        ),
+        migrations.CreateModel(
+            name='Order',
+            fields=[
+                ('id', models.BigAutoField(auto_created=True, primary_key=True, serialize=False, verbose_name='ID')),
+                ('created_on', models.DateTimeField(auto_now_add=True, verbose_name='Utworzono')),
+                ('updated_on', models.DateTimeField(auto_now=True, verbose_name='Zaktualizowano')),
+                ('data', models.JSONField(default=dict, verbose_name='Dane zamówienia')),
+                ('status', models.PositiveSmallIntegerField(choices=[(1, 'Zamówienie złożone'), (2, 'Zamówienie w trakcie przygotowywania'), (3, 'Zamówienie gotowe'), (4, 'Zamówienie skończone')], default=1, verbose_name='Status zamówienia')),
+                ('waiter', models.ForeignKey(null=True, on_delete=django.db.models.deletion.SET_NULL, related_name='orders', to='app.waiter', verbose_name='Kelner')),
+            ],
+        ),
+    ]

backend/app/migrations/0002_meal.py

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+# Generated by Django 5.1.4 on 2024-12-16 13:56
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('app', '0001_initial'),
+    ]
+
+    operations = [
+        migrations.CreateModel(
+            name='Meal',
+            fields=[
+                ('id', models.BigAutoField(auto_created=True, primary_key=True, serialize=False, verbose_name='ID')),
+                ('name', models.TextField(verbose_name='Danie')),
+            ],
+        ),
+    ]

backend/app/models.py

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+from django.db import models
+from django.utils.translation import gettext_lazy as _
+
+# Create your models here.
+
+
+class Waiter(models.Model):
+    name = models.CharField(_('Imię i nazwisko'), max_length=120)
+
+    def __str__(self):
+        return self.name
+
+    class Meta:
+        verbose_name = _("Kelner")
+        verbose_name_plural = _("Kelnerzy")
+
+
+class Meal(models.Model):
+    name = models.TextField(_('Danie'))
+
+    def __str__(self):
+        return self.name
+
+    class Meta:
+        verbose_name = _("Danie")
+        verbose_name_plural = _("Dania")
+
+
+class Order(models.Model):
+    created_on = models.DateTimeField(_('Utworzono'), auto_now_add=True)
+    updated_on = models.DateTimeField(_('Zaktualizowano'), auto_now=True)
+    waiter = models.ForeignKey(
+        Waiter, models.SET_NULL, related_name='orders', verbose_name=_('Kelner'), null=True
+    )
+    data = models.JSONField(_('Dane zamówienia'), default=dict)
+
+    class StatusChoices(models.IntegerChoices):
+        ORDERED = (1, _('Zamówienie złożone'))
+        IN_PROGRESS = (2, ('Zamówienie w trakcie przygotowywania'))
+        READY = (3, _('Zamówienie gotowe'))
+        FINALIZED = (4, _('Zamówienie skończone'))
+
+    status = models.PositiveSmallIntegerField(
+        _('Status zamówienia'),
+        choices=StatusChoices.choices,
+        default=StatusChoices.ORDERED,
+    )
+
+    def __str__(self):
+        return self.id
+
+    class Meta:
+        verbose_name = _("Zamówienie")
+        verbose_name_plural = _("Zamówienia")

backend/app/routing.py

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+# app/routing.py
+
+from django.urls import re_path
+
+from . import consumers
+
+websocket_urlpatterns = []

backend/app/tests.py

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+from django.test import TestCase
+
+# Create your tests here.

backend/app/views.py

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+from django.shortcuts import render
+
+# Create your views here.
+
+