Overhaul PLZ

pflaenzli/pflaenzli/admin.py

@@ -1,5 +1,5 @@
 from django.contrib import admin
-from .models import Offer, Wish, PflaenzliUser
+from .models import Offer, Wish, PflaenzliUser, Plz
 
 
 @admin.register(Offer)
@@ -15,3 +15,8 @@ class WishAdmin(admin.ModelAdmin):
 @admin.register(PflaenzliUser)
 class UserAdmin(admin.ModelAdmin):
     list_display = ['id', 'username', 'email', 'zipcode', 'language_code', 'date_joined']
+
+
+@admin.register(Plz)
+class PlzAdmin(admin.ModelAdmin):
+    list_display = ['id', 'name', 'plz', 'lat', 'lon']

pflaenzli/pflaenzli/management/commands/getplzindex.py

@@ -5,36 +5,52 @@ from urllib import request
 import pandas as pd
 from django.core.management.base import BaseCommand
 from pflaenzli_django.settings import BASE_DIR
+from pflaenzli.models import Plz
 
 
 class Command(BaseCommand):
     help = 'Get the zip code index from post and compile it to a dataframe pickle'
 
-    def handle(self, *args, **options):
-        self.parse_data(self.download_geojson(api='v2', data='v2'))
-        self.stdout.write(self.style.SUCCESS('Done!'))
+    def add_arguments(self, parser):
+        parser.add_argument("--force", action="store_true", required=False)
 
-    def download_geojson(self, api, data):
+    def handle(self, *args, **options):
+        self.parse_data(*self.download_geojson(api='v2', data='v2', force=options["force"]), force=options["force"])
+
+    def download_geojson(self, api, data, force=False):
         file = f'plz_verzeichnis_{data}.json'
-        if os.path.exists(file):
-            self.stdout.write('File already downloaded. Skipping...\n')
+        if os.path.exists(file) and not force:
+            self.stdout.write('File already downloaded.')
+            self.stdout.write(self.style.SUCCESS(
+                'Skipping...\n'))
+            exists = True
         else:
             self.stdout.write('Downloading geojson...')
             url = f'https://swisspost.opendatasoft.com/api/{api}/catalog/datasets/plz_verzeichnis_{data}/exports/geojson'
             request.urlretrieve(url, file)
             self.stdout.write(self.style.SUCCESS('Done!\n'))
+            exists = False
 
-        return file
+        return file, exists
+
+    def parse_data(self, file, exists, force=False):
+        if exists and not force:
+            self.stdout.write(self.style.WARNING(
+                'Nothing was done, if you want to redownload the PLZ index, use the --force option.\n'))
+            return
 
-    def parse_data(self, file):
         self.stdout.write('Opening file...')
         # Load the GeoJSON data for the zip codes
         with open(file, encoding='UTF-8') as f:
             full_data = json.load(f)
         self.stdout.write(self.style.SUCCESS('Done!\n'))
 
-        self.stdout.write('Parsing file...')
-        zip_dict = {}
+        self.stdout.write('Deleting existing data...')
+        Plz.objects.all().delete()
+        self.stdout.write(self.style.SUCCESS('Done!\n'))
+
+        self.stdout.write('Parsing file and add new data...')
+
         for plz_entry in full_data['features']:
             plz_entry = plz_entry['properties']
             try:
@@ -51,14 +67,12 @@ class Command(BaseCommand):
             if plz is None or lat is None or lon is None:
                 continue
 
-            zip_dict[int(plz)] = [lat, lon]
-        self.stdout.write(self.style.SUCCESS('Done!\n'))
+            try:
+                name = plz_entry['ortbez27']
+            except (KeyError, AttributeError, TypeError):
+                name = None
 
-        df = pd.DataFrame.from_dict(zip_dict, orient='index')
-        df.columns = ['lat', 'lon']
+            plz, _ = Plz.objects.get_or_create(plz=int(plz), lat=lat, lon=lon, name=name)
 
-        self.stdout.write('Saving pickle...')
-        destination = os.path.join(BASE_DIR, 'pflaenzli', 'utils', 'plz.pkl')
-        df.to_pickle(destination)
-
-        self.stdout.write(self.style.SUCCESS(f'Wrote pickle to {destination}\n'))
+        self.stdout.write(self.style.SUCCESS('Wrote PLZ data to the databse successfully\n'))
+        self.stdout.write(self.style.SUCCESS('Done!'))

pflaenzli/pflaenzli/migrations/0006_plz.py

@@ -0,0 +1,31 @@
+# Generated by Django 4.2.5 on 2023-09-13 15:09
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ("pflaenzli", "0005_pflaenzliuser_language_code_alter_offer_category"),
+    ]
+
+    operations = [
+        migrations.CreateModel(
+            name="Plz",
+            fields=[
+                (
+                    "id",
+                    models.BigAutoField(
+                        auto_created=True,
+                        primary_key=True,
+                        serialize=False,
+                        verbose_name="ID",
+                    ),
+                ),
+                ("plz", models.IntegerField(verbose_name="PLZ")),
+                ("lat", models.DecimalField(decimal_places=6, max_digits=8)),
+                ("lon", models.DecimalField(decimal_places=6, max_digits=8)),
+                ("name", models.CharField(max_length=27)),
+            ],
+        ),
+    ]

pflaenzli/pflaenzli/models.py

@@ -14,6 +14,13 @@ class PflaenzliUser(AbstractUser):
     language_code = models.CharField(max_length=2, default='de')
 
 
+class Plz(models.Model):
+    plz = models.IntegerField(verbose_name='PLZ')
+    lat = models.DecimalField(max_digits=8, decimal_places=6)
+    lon = models.DecimalField(max_digits=8, decimal_places=6)
+    name = models.CharField(max_length=27)
+
+
 class Offer(models.Model):
     CATEGORIES = [
         ('PLNT', _('Plant')),

pflaenzli/pflaenzli/templates/offer/detail.html

@@ -1,5 +1,6 @@
 {% extends 'base.html' %}
 {% load i18n %}
+{% load plz %}
 {% block title %}Offer: {{ offer.title }}{% endblock %}
 {% block meta %}
     <meta name="description"
@@ -30,7 +31,7 @@
                     {% endif %}
                 </p>
                 <p class="mr-3">
-                    <i class="fas fa-map-marker-alt"></i> {{ offer.zipcode }}
+                    {% with plz=offer|get_plz %}<i class="fas fa-map-marker-alt"></i> {{ plz.plz }} {{ plz.name }}{% endwith %}
                 </p>
                 {% if dist %}
                     <p class="pr-3">
@@ -90,7 +91,7 @@
         </div>
         <form method="post" action="{% url 'offer_trade' %}">
             {% csrf_token %}
-            <input type="hidden" name="offer" value="{{ offer.id }}"/>
+            <input type="hidden" name="offer" value="{{ offer.id }}" />
             <button class="btn btn-pfl mb-3" data-umami-event="Trade offer">{% trans "Offer trade" %}</button>
         </form>
     {% endif %}

pflaenzli/pflaenzli/templatetags/plz.py

@@ -0,0 +1,14 @@
+from django import template
+from pflaenzli.models import Plz
+
+register = template.Library()
+
+
+@register.filter
+def get_plz(offer):
+    try:
+        return Plz.objects.get(plz=offer.zipcode)
+    except Plz.MultipleObjectsReturned:
+        return Plz.objects.filter(plz=offer.zipcode).first()
+    except Plz.DoesNotExist:
+        return None

pflaenzli/pflaenzli/utils/distance.py

@@ -2,28 +2,34 @@ from geopy.distance import distance
 import os
 from pandas import read_pickle
 from django.db.models import F, Func
+from pflaenzli.models import Plz
 
 path = os.path.dirname(os.path.abspath(__file__))
 
 df = read_pickle(os.path.join(path, 'plz.pkl'))
 
 
-def calculate_distance(zip_1, zip_2):
-    if zip_1 == zip_2:
+def calculate_distance(plz_1: Plz, plz_2: Plz):
+    if plz_1 == plz_2:
         return 0
 
-    zip_1_coords = tuple(df[df.index == zip_1].values)
-    zip_2_coords = tuple(df[df.index == zip_2].values)
-
-    dist = round(distance((zip_1_coords), (zip_2_coords)).kilometers)
+    dist = round(distance((plz_1.lat, plz_1.lon), (plz_2.lat, plz_2.lon)).kilometers)
 
     return None if dist > 400 else dist
 
 
 def filter_by_distance(qs, filter_zipcode, max_dist):
     filtered_offers = []
+
+    try:
+        filter_plz = Plz.objects.get(plz=filter_zipcode)
+    except Plz.DoesNotExist:
+        return filtered_offers
+
     for offer in qs:
-        d = calculate_distance(int(offer.zipcode), int(filter_zipcode))
+        offer_plz = Plz.objects.get(plz=offer.zipcode)
+
+        d = calculate_distance(offer_plz, filter_plz)
         if d is not None and d <= max_dist:
             filtered_offers.append(offer)
     return filtered_offers

pflaenzli/pflaenzli/views.py

@@ -12,7 +12,7 @@ from django.views.decorators.http import require_POST
 
 from .forms import CreateOfferForm, FilterForm, RegistrationForm, WishForm
 from .mail import send_offer_email
-from .models import Offer, PflaenzliUser, Wish
+from .models import Offer, PflaenzliUser, Wish, Plz
 from .upload import generate_unique_filename
 from .utils.compress_image import compress_image
 from .utils.distance import calculate_distance, filter_by_distance
@@ -59,7 +59,7 @@ def offer_detail(request, offer_id):
             if offer.zipcode == request.user.zipcode:
                 dist = 0
             else:
-                dist = calculate_distance(offer.zipcode, request.user.zipcode)
+                dist = calculate_distance(Plz.objects.get(plz=offer.zipcode), Plz.objects.get(plz=request.user.zipcode))
         else:
             dist = None
     else: