boulangerie/maintenance/admin.py

from django.contrib import admin
from django import forms
from .models import Fournisseur, Technicien, Machine, Intervention, Panne


@admin.register(Fournisseur)
class FournisseurAdmin(admin.ModelAdmin):
    list_display = ['nom_fournisseur']


@admin.register(Technicien)
class TechnicienAdmin(admin.ModelAdmin):
    list_display = ['nom_technicien', 'ref_fournisseur']


class PanneInline(admin.TabularInline):
    model = Panne
    extra = 1


@admin.register(Machine)
class MachineAdmin(admin.ModelAdmin):
    list_display = ['numero_serie', 'nom_machine', 'ref_fournisseur']
    inlines = [PanneInline]


class InterventionAdminForm(forms.ModelForm):
    class Meta:
        model = Intervention
        fields = '__all__'

    def __init__(self, *args, **kwargs):
        super(InterventionAdminForm, self).__init__(*args, **kwargs)
        if self.instance:
            try:
                technicians = Technicien.objects.filter(
                    ref_fournisseur=self.
                    instance.
                    ref_panne.
                    ref_machine.
                    ref_fournisseur)
                self.fields['ref_technicien'].queryset = technicians
            except Panne.DoesNotExist:
                self.fields['ref_technicien'].queryset = Technicien. \
                                                         objects. \
                                                         none()


@admin.register(Intervention)
class InterventionAdmin(admin.ModelAdmin):
    form = InterventionAdminForm
    list_display = ['moment_intervention', 'description_intervention',
                    'ref_panne', 'ref_technicien']


@admin.register(Panne)
class PanneAdmin(admin.ModelAdmin):
    list_display = ['moment_panne', 'description_panne', 'ref_machine']