#121 Deferred parcels

* improves filtering by gmrkng and krs
* implements deferred loading of parcels on spatial referenced data objects
* adds HTMX to project
* improves detail view layout (mainly interesting for smaller displays/mobile)

konova/filters/mixins.py

@@ -185,7 +185,7 @@ class GeoReferencedTableFilterMixin(django_filters.FilterSet):
 
         """
         matching_districts = District.objects.filter(
-            krs=value
+            krs__icontains=value
         )
         matching_parcels = Parcel.objects.filter(
             district__in=matching_districts
@@ -209,7 +209,7 @@ class GeoReferencedTableFilterMixin(django_filters.FilterSet):
         Returns:
 
         """
-        queryset = self._filter_parcel_reference(queryset, name, value, "gmrkng__istartswith")
+        queryset = self._filter_parcel_reference(queryset, name, value, "gmrkng__icontains")
         return queryset
 
     def filter_parcel(self, queryset, name, value) -> QuerySet:

konova/templates/konova/includes/parcel_table.html

@@ -0,0 +1,32 @@
+{% load i18n %}
+<div class="table-container w-100 scroll-300">
+    {% if parcels|length == 0 %}
+    <article class="alert alert-info">
+        {% trans 'Parcels can not be calculated, since no geometry is given.' %}
+    </article>
+    {% else %}
+    <table class="table table-hover">
+        <thead>
+            <tr>
+                <th scope="col">{% trans 'Kreis' %}</th>
+                <th scope="col">{% trans 'Gemarkung' %}</th>
+                <th scope="col">{% trans 'Parcel' %}</th>
+                <th scope="col">{% trans 'Parcel counter' %}</th>
+                <th scope="col">{% trans 'Parcel number' %}</th>
+            </tr>
+        </thead>
+        <tbody>
+        {% for parcel in parcels %}
+            <tr>
+                <td>{{parcel.district.krs|default_if_none:"-"}}</td>
+                <td>{{parcel.gmrkng|default_if_none:"-"}}</td>
+                <td>{{parcel.flr|default_if_none:"-"}}</td>
+                <td>{{parcel.flrstck_zhlr|default_if_none:"-"}}</td>
+                <td>{{parcel.flrstck_nnr|default_if_none:"-"}}</td>
+            </tr>
+        {% endfor %}
+
+        </tbody>
+    </table>
+    {% endif %}
+</div>

konova/templates/konova/includes/parcels.html

@@ -1,37 +1,8 @@
 {% load i18n %}
-<div>
+<div class="col-sm-12">
     <h3>{% trans 'Spatial reference' %}</h3>
-</div>
-<div class="table-container w-100 scroll-300">
-    {% if parcels|length == 0 %}
-    <article class="alert alert-info">
-        {% blocktrans %}
-        If the geometry is not empty, the parcels are currently recalculated. Please refresh this page in a few moments.
-        {% endblocktrans %}
-    </article>
-    {% else %}
-    <table class="table table-hover">
-        <thead>
-            <tr>
-                <th scope="col">{% trans 'Kreis' %}</th>
-                <th scope="col">{% trans 'Gemarkung' %}</th>
-                <th scope="col">{% trans 'Parcel' %}</th>
-                <th scope="col">{% trans 'Parcel counter' %}</th>
-                <th scope="col">{% trans 'Parcel number' %}</th>
-            </tr>
-        </thead>
-        <tbody>
-        {% for parcel in parcels %}
-            <tr>
-                <td>{{parcel.district.krs|default_if_none:"-"}}</td>
-                <td>{{parcel.gmrkng|default_if_none:"-"}}</td>
-                <td>{{parcel.flr|default_if_none:"-"}}</td>
-                <td>{{parcel.flrstck_zhlr|default_if_none:"-"}}</td>
-                <td>{{parcel.flrstck_nnr|default_if_none:"-"}}</td>
-            </tr>
-        {% endfor %}
-
-        </tbody>
-    </table>
-    {% endif %}
+    <div class="align-middle" hx-trigger="every 2s" hx-get="{% url 'geometry-parcels' geom_form.instance.geometry.id %}">
+        <span class="spinner-border rlp-r-inv" role="status"></span>
+        <span>{% trans 'Loading...' %}</span>
+    </div>
 </div>

konova/urls.py

@@ -23,7 +23,7 @@ from konova.autocompletes import EcoAccountAutocomplete, \
     ShareUserAutocomplete, BiotopeExtraCodeAutocomplete, CompensationActionDetailCodeAutocomplete, ShareTeamAutocomplete
 from konova.settings import SSO_SERVER, SSO_PUBLIC_KEY, SSO_PRIVATE_KEY, DEBUG
 from konova.sso.sso import KonovaSSOClient
-from konova.views import logout_view, home_view
+from konova.views import logout_view, home_view, get_geom_parcels
 
 sso_client = KonovaSSOClient(SSO_SERVER, SSO_PUBLIC_KEY, SSO_PRIVATE_KEY)
 urlpatterns = [
@@ -39,6 +39,7 @@ urlpatterns = [
     path('cl/', include("codelist.urls")),
     path('analysis/', include("analysis.urls")),
     path('api/', include("api.urls")),
+    path('geom/<id>/parcels', get_geom_parcels, name="geometry-parcels"),
 
     # Autocomplete paths for all apps
     path("atcmplt/eco-accounts", EcoAccountAutocomplete.as_view(), name="accounts-autocomplete"),

konova/views.py

@@ -7,20 +7,17 @@ Created on: 16.11.20
 """
 from django.contrib.auth import logout
 from django.contrib.auth.decorators import login_required
-from django.http import HttpRequest, FileResponse
+from django.http import HttpRequest, HttpResponse
 from django.shortcuts import redirect, render, get_object_or_404
 from django.template.loader import render_to_string
 from django.utils import timezone
 from django.utils.translation import gettext_lazy as _
 
-from codelist.models import KonovaCode
-from codelist.settings import CODELIST_COMPENSATION_ACTION_ID
 from compensation.models import Compensation, EcoAccount
 from intervention.models import Intervention
 from konova.contexts import BaseContext
 from konova.decorators import any_group_check
-from konova.forms import RemoveModalForm
-from konova.models import Deadline
+from konova.models import Deadline, Geometry
 from konova.sub_settings.context_settings import TAB_TITLE_IDENTIFIER
 from news.models import ServerMessage
 from konova.settings import SSO_SERVER_BASE
@@ -102,6 +99,46 @@ def home_view(request: HttpRequest):
     return render(request, template, context)
 
 
+@login_required
+def get_geom_parcels(request: HttpRequest, id: str):
+    """ Getter for HTMX
+
+    Returns all parcels of the requested geometry rendered into a simple HTML table
+
+    Args:
+        request (HttpRequest): The incoming request
+        id (str): The geometry's id
+
+    Returns:
+
+    """
+    # HTTP code 286 states that the HTMX should stop polling for updates
+    # https://htmx.org/docs/#polling
+    status_code = 286
+    template = "konova/includes/parcel_table.html"
+    geom = get_object_or_404(Geometry, id=id)
+    parcels = geom.get_underlying_parcels()
+    geos_geom = geom.geom
+
+    parcels_are_currently_calculated = geos_geom is not None and geos_geom.area > 0 and len(parcels) == 0
+    parcels_available = len(parcels) > 0
+    no_geometry_given = geos_geom is None
+
+    if parcels_are_currently_calculated:
+        # Parcels are being calculated right now. Change the status code, so polling stays active for fetching
+        # resutls after the calculation
+        status_code = 200
+
+    if parcels_available or no_geometry_given:
+        context = {
+            "parcels": parcels,
+        }
+        html = render_to_string(template, context, request)
+        return HttpResponse(html, status=status_code)
+    else:
+        return HttpResponse(None, status=404)
+
+
 def get_404_view(request: HttpRequest, exception=None):
     """ Returns a 404 handling view