multi-objective weights

app/static/scss/layouts/_moo.scss

@@ -0,0 +1,22 @@
+.padding-1 {
+  padding: 1rem;
+  width: 35%;
+  align-self: center;
+}
+
+.center-text {
+  text-align: center;
+}
+
+.inp-default {
+  width: initial;
+}
+
+.no-bullet ul {
+  list-style-type: none;
+}
+
+.error {
+  color: red;
+  font-weight: bold;
+}

app/static/scss/main.scss

@@ -21,6 +21,7 @@
 @import 'layouts/general-layout';
 @import 'layouts/gui';
 @import 'layouts/homepage';
+@import 'layouts/moo';
 @import 'layouts/project';
 @import 'layouts/scenario-create';
 @import 'layouts/signup';

app/templates/wefe/steps/moo_setup.html

@@ -0,0 +1,51 @@
+{% extends 'wefe/steps/step_progression.html' %}
+{% load crispy_forms_tags %}
+{% load i18n %}
+
+{% block progression_content %}
+  <div class="padding-1">
+    <div class="center-text">
+      <input id="inp-moo" type="checkbox" class="inp-default" onchange="update_weights()" {% if custom_weights or form.errors %}checked{% endif %}>
+      <label for="inp-moo">{% translate 'Use Multi-Objective Optimization' %}</label>
+    </div>
+    <form id="form" method="post">
+      {% csrf_token %}
+      <div>
+        {{ form | crispy }}
+      </div>
+    </form>
+  </div>
+{% endblock progression_content %}
+
+{% block next_btn %}
+<button class="btn btn--medium" onclick="document.getElementById('form').submit()">{% translate "Next" %}</button>
+{% endblock next_btn %}
+
+{% block end_body_scripts %}
+<script>
+  // init weights
+  var weights = {};
+  for (let inp of $(':input[type="number"]'))
+      weights[inp.id] = inp.value;
+
+  function update_weights() {
+    let form = document.getElementById('form');
+    let check = document.getElementById('inp-moo');
+    let inputs = $(':input[type="number"]');
+    form.style.display = check.checked ? '' : 'none';
+    for (let inp of inputs) {
+      if (check.checked) {
+        // multi-objective: restore weight
+        inp.value = weights[inp.id];
+      } else {
+        // single objective: reset weight
+        weights[inp.id] = inp.value;
+        inp.value = inp.getAttribute('default');
+      }
+    }
+  }
+  // initialize state
+  update_weights();
+
+</script>
+{% endblock end_body_scripts %}

app/wefe/forms.py

@@ -9,7 +9,7 @@
 from projects.forms import OpenPlanForm, OpenPlanModelForm
 from projects.models import Project, EconomicData, Scenario
 from projects.requests import request_exchange_rate
-from wefe.models import SurveyQuestion
+from wefe.models import MOOWeights, SurveyQuestion
 
 from wefe.survey import SURVEY_STRUCTURE, SURVEY_CATEGORIES, TYPE_STRING
 
@@ -367,3 +367,38 @@ def clean(self):
         else:
             raise ValidationError("This form cannot be blank")
         return cleaned_data
+
+
+class MOOForm(forms.ModelForm):
+    # multi-objective optimization setup
+    class Meta:
+        model = MOOWeights
+        exclude = ["scenario"]
+
+    total_cost = forms.FloatField(
+        min_value=0, max_value=1, initial=1,
+        widget=forms.NumberInput(attrs={'step': 0.1, 'default': 1})
+    )
+    co2_emissions = forms.FloatField(
+        min_value=0, max_value=1, initial=0,
+        widget=forms.NumberInput(attrs={'step': 0.1, 'default': 0})
+    )
+    land_requirements = forms.FloatField(
+        min_value=0, max_value=1, initial=0,
+        widget=forms.NumberInput(attrs={'step': 0.1, 'default': 0})
+    )
+    water_footprint = forms.FloatField(
+        min_value=0, max_value=1, initial=0,
+        widget=forms.NumberInput(attrs={'step': 0.1, 'default': 0})
+    )
+
+    def clean(self):
+        # check that weights add up to 1
+        cleaned_data = super().clean()
+        cost = cleaned_data.get("total_cost")
+        co2 = cleaned_data.get("co2_emissions")
+        land = cleaned_data.get("land_requirements")
+        water = cleaned_data.get("water_footprint")
+        if cost is not None and co2 is not None and land is not None and water is not None:
+            if round(cost + co2 + land + water, 4) != 1:
+                raise ValidationError("Weights must add up to 1")

app/wefe/migrations/0004_mooweights.py

@@ -0,0 +1,26 @@
+# Generated by Django 5.1.3 on 2025-11-04 14:49
+
+import django.db.models.deletion
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ("projects", "0027_alter_economicdata_currency"),
+        ("wefe", "0003_wefesimulation"),
+    ]
+
+    operations = [
+        migrations.CreateModel(
+            name="MOOWeights",
+            fields=[
+                ("id", models.AutoField(auto_created=True, primary_key=True, serialize=False, verbose_name="ID")),
+                ("total_cost", models.FloatField(default=1)),
+                ("co2_emissions", models.FloatField(default=0)),
+                ("land_requirements", models.FloatField(default=0)),
+                ("water_footprint", models.FloatField(default=0)),
+                ("scenario", models.OneToOneField(on_delete=django.db.models.deletion.CASCADE, to="projects.scenario")),
+            ],
+        ),
+    ]

app/wefe/models.py

@@ -80,3 +80,12 @@ def copy_energy_system_from_usecase(usecase_name, scenario):
     # assign the assets and busses to the given scenario
     assign_assets(scenario, assets)
     assign_busses(scenario, busses)
+
+
+class MOOWeights(models.Model):
+    # multi-objective optimization weights
+    scenario = models.OneToOneField(Scenario, on_delete=models.CASCADE)
+    total_cost = models.FloatField(default=1)
+    co2_emissions = models.FloatField(default=0)
+    land_requirements = models.FloatField(default=0)
+    water_footprint = models.FloatField(default=0)

app/wefe/views.py

@@ -5,27 +5,26 @@
 from django.conf import settings
 from django.contrib import messages
 from django.contrib.auth.decorators import login_required
+from django.core.exceptions import ObjectDoesNotExist, PermissionDenied
+from django.db.models import Q, F, Avg, Max
 from django.http import JsonResponse
-from django.utils.translation import gettext_lazy as _
 from django.shortcuts import *
 from django.urls import reverse
-from django.core.exceptions import PermissionDenied
+from django.utils.translation import gettext_lazy as _
 from django.views.decorators.http import require_http_methods
-from django.db.models import Q, F, Avg, Max
 from jsonview.decorators import json_view
 
-from epa.settings import WEFESIM_GET_URL
-from projects.constants import DONE, ERROR
-from .forms import *
-from .helpers import *
 from business_model.forms import *
+from business_model.models import *
+from projects.constants import DONE, ERROR
+from projects.forms import UploadFileForm, ProjectShareForm, ProjectRevokeForm, UseCaseForm
 from projects.models import *
 from projects.models.base_models import Timeseries
 from projects.views import project_duplicate, project_delete
-from business_model.models import *
-from projects.forms import UploadFileForm, ProjectShareForm, ProjectRevokeForm, UseCaseForm
 
-from wefe.models import SurveyAnswer, WEFESimulation
+from wefe.forms import *
+from wefe.helpers import *
+from wefe.models import MOOWeights, SurveyAnswer, WEFESimulation
 from wefe.requests import (
     fetch_wefedemand_simulation_results,
     wefedemand_simulation_request,
@@ -36,8 +35,6 @@
 from wefe.survey import SURVEY_CATEGORIES, SURVEY_QUESTIONS_CATEGORIES, get_survey_question_by_id
 
 import logging
-
-
 logger = logging.getLogger(__name__)
 
 
@@ -597,10 +594,28 @@ def wefe_optimization_weighting(request, proj_id, step_id=STEP_MAPPING["optimiza
     }
 
     if request.method == "GET":
-        return render(request, "wefe/steps/step_progression.html", context)
+        try:
+            # weights already defined: get values
+            weights = scenario.mooweights
+            context["form"] = MOOForm(initial=vars(weights))
+            context["custom_weights"] = weights.total_cost != 1
+        except ObjectDoesNotExist:
+            # no weights yet: use defaults
+            context["form"] = MOOForm()
+        return render(request, "wefe/steps/moo_setup.html", context)
 
     if request.method == "POST":
-        # TODO
+        form = MOOForm(request.POST)
+        if not form.is_valid():
+            context["form"] = form
+            return render(request, "wefe/steps/moo_setup.html", context)
+
+        # save form data (1 to 1 relation between scenario and weights)
+        # weights might already exist -> maybe just update -> saving ModelForm does not work
+        MOOWeights.objects.update_or_create(
+            scenario=scenario,
+            defaults=form.cleaned_data,
+        )
         return HttpResponseRedirect(reverse("wefe_steps", args=[proj_id, step_id + 1]))
 
 
@@ -626,7 +641,7 @@ def wefe_simulation(request, proj_id, step_id=STEP_MAPPING["simulation"]):
             "step_id": step_id,
             "step_list": WEFE_STEP_VERBOSE,
             "page_information": page_information,
-            "WEFESIM_GET_URL": WEFESIM_GET_URL,
+            "WEFESIM_GET_URL": settings.WEFESIM_GET_URL,
         }
 
         qs = WEFESimulation.objects.filter(scenario=project.scenario, app="wefesim")