prvi kod za live uporabu

backend/modules/crm/admin.py

@@ -0,0 +1,86 @@
+from django import forms
+from django.contrib import admin
+from django.contrib.admin.widgets import FilteredSelectMultiple
+from django.utils.translation import gettext_lazy as _
+from modules.fleet.models import Crane
+from .models import Client
+
+
+class ClientAdminForm(forms.ModelForm):
+    customer_cranes = forms.ModelMultipleChoiceField(
+        label=_("Vozila kupca"),
+        queryset=Crane.objects.filter(is_active=True, asset_type='crane').order_by('registration_number'),
+        required=False,
+        widget=FilteredSelectMultiple(_("Dizalice"), is_stacked=False),
+        help_text=_("Odaberite postojeće dizalice koje pripadaju kupcu."),
+    )
+
+    class Meta:
+        model = Client
+        fields = '__all__'
+
+    def __init__(self, *args, **kwargs):
+        super().__init__(*args, **kwargs)
+        if self.instance.pk:
+            self.fields['customer_cranes'].initial = Crane.objects.filter(client=self.instance, is_active=True, asset_type='crane')
+
+
+@admin.register(Client)
+class ClientAdmin(admin.ModelAdmin):
+    form = ClientAdminForm
+    # Polja koja se prikazuju u listi
+    list_display = ('name', 'tax_id', 'city', 'client_type', 'vehicle_count', 'is_active', 'created_at')
+    
+    # Polja koja omogućuju klik na objekt
+    list_display_links = ('name', 'tax_id')
+    
+    # Filteri sa strane (vrlo korisno za ERP)
+    list_filter = ('client_type', 'is_active', 'created_at')
+    
+    # Polja po kojima admin može pretraživati
+    search_fields = ('name', 'tax_id', 'email')
+
+    readonly_fields = ('created_at', 'updated_at', 'linked_cranes_preview')
+
+    # Grupiranje polja u formi za ljepši pregled
+    fieldsets = (
+        (_('Osnovni podaci'), {
+            'fields': ('name', 'client_type', 'tax_id')
+        }),
+        (_('Kontakt podaci'), {
+            'fields': ('email', 'phone', 'address', 'city', 'postal_code')
+        }),
+        (_('Vozila kupca'), {
+            'fields': ('customer_cranes', 'linked_cranes_preview')
+        }),
+        (_('Sustavni podaci'), {
+            'fields': ('is_active', 'created_at', 'updated_at'),
+            'classes': ('collapse',)
+        }),
+    )
+
+    list_per_page = 50
+
+    @admin.display(description="Dizalice")
+    def vehicle_count(self, obj):
+        return obj.vehicles.filter(asset_type='crane').count()
+
+    @admin.display(description="Povezane dizalice")
+    def linked_cranes_preview(self, obj):
+        if not obj.pk:
+            return _("Spremite klijenta za prikaz povezanih dizalica.")
+        cranes = Crane.objects.filter(client=obj, is_active=True, asset_type='crane').order_by('registration_number')
+        if not cranes.exists():
+            return _("Nema povezanih dizalica.")
+        return ", ".join(str(crane) for crane in cranes)
+
+    def save_related(self, request, form, formsets, change):
+        super().save_related(request, form, formsets, change)
+        selected_cranes = form.cleaned_data.get('customer_cranes')
+        if selected_cranes is None:
+            return
+
+        selected_ids = list(selected_cranes.values_list('id', flat=True))
+        Crane.objects.filter(client=form.instance, asset_type='crane').exclude(pk__in=selected_ids).update(client=None)
+        if selected_ids:
+            Crane.objects.filter(pk__in=selected_ids).update(client=form.instance, is_company_vehicle=False, asset_type='crane')