Created fuel section and the user can create categories

expenses_manager/expenses/forms.py

@@ -1,5 +1,5 @@
 from django import forms
-from .models import Expense, Category, Income, Tag, Account
+from .models import Expense, Category, Income, Tag, Account, FuelEntry
 
 class ExpenseForm(forms.ModelForm):
     
@@ -55,4 +55,27 @@ class IncomeForm(forms.ModelForm):
         self.fields['account'].queryset = Account.objects.filter(
             owner=user,
             active=True,
-        )
+        )
+
+class FuelEntryForm(forms.Form):
+    # Expense fields
+    date = forms.DateField(widget=forms.DateInput(attrs={'type': 'date'}))
+    amount = forms.DecimalField(max_digits=10, decimal_places=2)
+    account = forms.ModelChoiceField(queryset=None)
+    
+    # Specifics fuel fields
+    odometer = forms.IntegerField(label='kilometraje actual')
+    liters = forms.DecimalField(max_digits=8, decimal_places=2)
+    
+    def __init__(self, *args, **kwargs):
+        user = kwargs.pop('user')
+        super().__init__(*args, **kwargs)
+        
+        self.fields['account'].queryset = (
+            user.accounts.filter(active=True)
+        )
+
+class CategoryForm(forms.ModelForm):
+    class Meta:
+        model = Category
+        fields = ['name', 'parent']

expenses_manager/expenses/migrations/0005_fuelentry.py

@@ -0,0 +1,27 @@
+# Generated by Django 5.2.10 on 2026-02-17 11:58
+
+import django.db.models.deletion
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('expenses', '0004_income'),
+    ]
+
+    operations = [
+        migrations.CreateModel(
+            name='FuelEntry',
+            fields=[
+                ('id', models.BigAutoField(auto_created=True, primary_key=True, serialize=False, verbose_name='ID')),
+                ('odometer', models.PositiveIntegerField()),
+                ('liters', models.DecimalField(decimal_places=2, max_digits=8)),
+                ('created_at', models.DateTimeField(auto_now_add=True)),
+                ('expense', models.OneToOneField(on_delete=django.db.models.deletion.CASCADE, related_name='fuel_data', to='expenses.expense')),
+            ],
+            options={
+                'ordering': ['odometer'],
+            },
+        ),
+    ]

expenses_manager/expenses/migrations/0006_category_slug.py

@@ -0,0 +1,18 @@
+# Generated by Django 5.2.10 on 2026-02-17 12:14
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('expenses', '0005_fuelentry'),
+    ]
+
+    operations = [
+        migrations.AddField(
+            model_name='category',
+            name='slug',
+            field=models.SlugField(blank=True),
+        ),
+    ]

expenses_manager/expenses/migrations/0007_alter_category_options_and_more.py

@@ -0,0 +1,23 @@
+# Generated by Django 5.2.10 on 2026-02-17 12:23
+
+from django.conf import settings
+from django.db import migrations
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('expenses', '0006_category_slug'),
+        migrations.swappable_dependency(settings.AUTH_USER_MODEL),
+    ]
+
+    operations = [
+        migrations.AlterModelOptions(
+            name='category',
+            options={'ordering': ['name'], 'verbose_name_plural': 'categories'},
+        ),
+        migrations.AlterUniqueTogether(
+            name='category',
+            unique_together={('name', 'parent', 'owner', 'slug')},
+        ),
+    ]

expenses_manager/expenses/models.py

@@ -5,9 +5,12 @@ from django.conf import settings
 from django.db.models import Sum
 from django.db.models.fields import related
 from django.db.models.functions import ExtractMonth
+from django.utils.text import slugify
 
 class Category(models.Model):
     name = models.CharField(max_length=100)
+    slug = models.SlugField(blank=True)
+    
     owner = models.ForeignKey(
         settings.AUTH_USER_MODEL,
         on_delete=models.CASCADE,
@@ -23,13 +26,19 @@ class Category(models.Model):
     )
     
     class Meta:
-        unique_together = ("name", "parent", "owner")
+        unique_together = ("name", "parent", "owner", "slug")
         verbose_name_plural = "categories"
+        ordering = ["name"]
     
     def __str__(self):
         return self.name
 
-
+    def save(self, *args, **kwargs):
+        if not self.slug:
+            from django.utils.text import slugify
+            self.slug = slugify(self.name)
+        super().save(*args, **kwargs)
+    
 class Account(models.Model):    
     owner = models.ForeignKey(
         settings.AUTH_USER_MODEL,
@@ -211,3 +220,41 @@ class Income(models.Model):
     
     def __str__(self):
         return f'{self.name} - {self.amount}'
+    
+
+class FuelEntry(models.Model):
+    expense = models.OneToOneField(
+        Expense,
+        on_delete=models.CASCADE,
+        related_name="fuel_data"
+    )
+    
+    odometer = models.PositiveIntegerField() # kilometers 
+    liters = models.DecimalField(max_digits=8, decimal_places=2)
+    
+    created_at = models.DateTimeField(auto_now_add=True)
+    
+    class Meta:
+        ordering = ['odometer']
+
+    def km_since_previous(self):
+        previous = FuelEntry.objects.filter(
+            expense__owner=self.expense.owner,
+            odometer__lt=self.odometer
+        ).order_by('-odometer').first()
+        
+        if previous:
+            return self.odometer - previous.odometer
+        
+        return None
+    
+    def price_per_liter(self):
+        if self.liters:
+            return self.expense.amount / self.liters
+        return 0
+    
+    def consumption(self):
+        km = self.km_since_previous()
+        if km and km > 0:
+            return (self.liters / km) * 100
+        return None

expenses_manager/expenses/templates/categories/list.html

@@ -0,0 +1,38 @@
+{% extends "expenses/base.html" %}
+
+{% block title %}
+    Categorías
+{% endblock %}
+
+{% block content %}
+
+    <h1>Mis categorías</h1>
+
+    <h3> Nueva categoría</h3>
+    <form method="post">
+        {% csrf_token %}
+        {{ form.as_p }}
+        <button type="submit">Crear</button>   
+    </form>
+
+    <hr>
+
+    <h3>Listado</h3>
+    <table>
+        <thead>
+            <tr>
+                <th>Categoría</th>
+                <th>Categoría padre</th>
+            </tr>
+        </thead>
+        <tbody>
+            {% for category in categories %}
+                <tr>
+                    <td>{{ category.name }}</td>
+                    <td>{% if category.parent %}{{ category.parent.name }}{% endif %}</td>
+                </tr>
+            {% endfor %}
+        </tbody>
+    </table>    
+
+{% endblock %}

expenses_manager/expenses/templates/expenses/base.html

@@ -19,12 +19,13 @@
                     <a href="{% url 'account_list' %}" class="nav-item {% if active_menu == 'accounts' %}active{% endif %} ">Cuentas</a>
                     <a href="{% url 'income_list' %}" class="nav-item {% if active_menu == 'incomes' %}active{% endif %} ">Ingresos</a>
                     <a href="{% url 'tag_list' %}" class="nav-item {% if active_menu == 'tags' %}active{% endif %} ">Etiquetas</a>
+                    <a href="{% url 'fuel_list' %}" class="nav-item {% if active_menu == 'fuel' %}active{% endif %} ">Repostajes</a>
 
                     <span class="spacer"></span>
 
-                    <span class="user">
+                    <a href="{% url 'category_list' %}">
                         Hola {{ request.user.username }}
-                    </span>
+                    </a>
 
                     <form method="post" action="{% url 'logout' %}" class="logout-form">
                         {% csrf_token %}

expenses_manager/expenses/templates/fuel/create.html

@@ -0,0 +1,21 @@
+{% extends "expenses/base.html" %}
+
+{% block title %}
+    Nuevo repostaje
+{% endblock %}
+
+{% block content %}
+    <h1>
+        Nuevo repostaje
+    </h1>
+
+    <form method="post">
+        {% csrf_token %}
+        {{ form.as_p }}
+        <button type="submit">
+            Crear repostaje
+        </button>            
+    </form>
+
+    <a href="{% url 'fuel_list' %}">Volver</a>
+{% endblock %}

expenses_manager/expenses/templates/fuel/list.html

@@ -0,0 +1,82 @@
+{% extends "expenses/base.html" %}
+
+{% block title %}
+    Repostajes
+{% endblock %}
+
+{% block content %}
+
+    <h1>Mis repostajes</h1>
+
+    <a class="btn" href="{% url 'fuel_create' %}">➕ Nuevo repostaje</a>
+
+    </div>
+
+    <table>
+        <thead>
+            <tr>
+                <th>Fecha</th>
+                <th>Kilometraje</th>
+                <th>Litros</th>
+                <th>Gasto</th>
+                <th>€/L</th>
+                <th>Km desde anterior</th>
+            </tr>
+        </thead>
+        <tbody>
+            {% for fuel in fuels %}
+                <tr>
+                    <td>{{ fuel.expense.date }}</td>
+                    <td>{{ fuel.odometer }}</td>
+                    <td>{{ fuel.liters }}</td>
+                    <td>{{ fuel.expense.amount }}</td>
+                    <td>{{ fuel.price_per_liter|floatformat:2 }}</td>
+                    <td>{{ fuel.km_since_previous }}</td>
+                </tr>
+            {% endfor %}
+        </tbody>
+    </table>
+
+    <form method="get">
+        <select name="year" onchange="this.form.submit()">
+            {% for y in year_list %}
+                <option value="{{ y }}" {% if y == selected_year %}selected{% endif %}>
+                    {{ y }}
+                </option>
+            {% endfor %}
+        </select>
+    </form>
+
+    <canvas id="monthlyChart"></canvas>
+    <canvas id="kmChart"></canvas>    
+    
+    <script>
+        const monthlyData = {{ monthly_data|safe }};
+
+        new Chart(document.getElementById('monthlyChart'), {
+            type: 'bar',
+            data: {
+                labels: ['Ene','Feb','Mar','Abr','May','Jun','Jul','Ago','Sep','Oct','Nov','Dic'],
+                datasets: [{
+                    label: 'Gasto mensual',
+                    data: monthlyData
+                }]
+            }
+        });
+
+        const kmData = {{ km_data|safe }};
+        const kmDates = {{ km_dates|safe }};
+
+        new Chart(document.getElementById('kmChart'), {
+            type: 'line',
+            data: {
+                labels: kmDates,
+                datasets: [{
+                    label: 'Km entre repostajes',
+                    data: kmData
+                }]
+            }
+        });
+    </script>
+
+{% endblock %}

expenses_manager/expenses/urls.py

@@ -20,4 +20,7 @@ urlpatterns = [
     path('incomes/new/', views.income_create, name='income_create'),
     path('incomes/<int:pk>/edit/', views.income_edit, name='income_edit'),
     path('incomes/<int:pk>/delete/', views.income_delete, name='income_delete'),
+    path('fuel/', views.fuel_list, name='fuel_list'),
+    path('fuel/create/', views.fuel_create, name='fuel_create'),
+    path('categories/', views.category_list, name='category_list'),
 ]

expenses_manager/expenses/views.py

@@ -1,8 +1,8 @@
-from datetime import date
 from operator import truediv
+from datetime import date, datetime
 from django.contrib import messages
-from .models import Account, Category, Expense, Tag, Income
+from .models import Account, Category, Expense, FuelEntry, Tag, Income
-from .forms import ExpenseForm, IncomeForm, TagForm, AccountForm
+from .forms import ExpenseForm, IncomeForm, TagForm, AccountForm, FuelEntryForm, CategoryForm
 # from dateutli.relativedelta import relativedelta
 
 from django.db.models import Sum
@@ -748,3 +748,107 @@ def income_delete(request, pk):
         {'active_menu': 'incomes','income':income}
     )
 
+@login_required
+def fuel_create(request):
+    if request.method == 'POST':
+        form = FuelEntryForm(request.POST, user=request.user)
+        
+        if form.is_valid():
+            expense = Expense.objects.create(
+                owner=request.user,
+                date=form.cleaned_data['date'],
+                amount=form.cleaned_data['amount'],
+                account=form.cleaned_data['account'],
+                category=Category.objects.get(slug='gasolina'),
+                description='Repostaje',
+            )
+            
+            FuelEntry.objects.create(
+                expense=expense,
+                odometer=form.cleaned_data['odometer'],
+                liters=form.cleaned_data['liters'],
+            )
+            
+            return redirect('fuel_list')
+    
+    else:
+        form = FuelEntryForm(user=request.user)
+        
+        return render(request, 'fuel/create.html',{
+            'active_menu': 'fuel',
+            'form': form
+        })
+
+@login_required
+def fuel_list(request):
+    selected_year = request.GET.get('year')
+    
+    current_year = datetime.now().year
+    
+    if selected_year:
+        selected_year = int(selected_year)
+    else:
+        selected_year = current_year
+    
+    fuels = FuelEntry.objects.filter(
+        expense__owner=request.user,
+        expense__date__year=selected_year
+    ).select_related('expense').order_by('expense__date')
+    
+    monthly_expenses = (
+        fuels
+        .annotate(month=ExtractMonth('expense__date'))
+        .values('month')
+        .annotate(total=Sum('expense__amount'))
+    )
+    
+    month_map = {m['month']: float(m['total']) for m in monthly_expenses}
+    
+    monthly_data = [
+        month_map.get(month, 0)
+        for month in range(1, 13)
+    ]
+    
+    km_data = []
+    dates = []
+    
+    for fuel in fuels:
+        km = fuel.km_since_previous()
+        if km:
+            km_data.append(km)
+            dates.append(fuel.expense.date.strftime('%Y-%m-%d'))
+    
+    return render( request, 'fuel/list.html', 
+        {
+            'active_menu': 'fuel',
+            'fuels': fuels,
+            'monthly_data': monthly_data,
+            'km_data': km_data,
+            'km_dates': dates,
+            'selected_year': selected_year,
+            'year_list': range(current_year - 5, current_year + 1),
+        }
+    )
+
+@login_required
+def category_list(request):
+    categories = Category.objects.filter(
+        owner=request.user
+    )
+    
+    if request.method == "POST":
+        form = CategoryForm(request.POST)
+        if form.is_valid():
+            category = form.save(commit=False)
+            category.owner = request.user
+            category.save()
+            return redirect('category_list')
+    else:
+        form = CategoryForm()
+        
+    return render(request, 'categories/list.html', {
+        'active_menu': 'categories',
+        'categories': categories,
+        'form': form,        
+    })
+