ModelForms والتحقق من المجال

from django.conf import settings
settings.configure(
    SECRET_KEY="synthetic-course-key",
    USE_I18N=False, USE_TZ=True,
    INSTALLED_APPS=[],
    DATABASES={"default": {"ENGINE": "django.db.backends.sqlite3", "NAME": ":memory:"}},
    DEFAULT_AUTO_FIELD="django.db.models.AutoField",
    ALLOWED_HOSTS=["testserver"],
)
import django
django.setup()

from django import forms

class IntervalForm(forms.Form):
    start = forms.IntegerField(min_value=0)
    end = forms.IntegerField(min_value=0)
    def clean(self):
        data = super().clean()
        start, end = data.get("start"), data.get("end")
        if start is not None and end is not None and end <= start:
            raise forms.ValidationError("End must be after start.")
        return data

good = IntervalForm({"start": "2", "end": "5"})
bad = IntervalForm({"start": "2", "end": "2"})
print(good.is_valid(), good.cleaned_data["end"])
print(bad.is_valid(), bool(bad.non_field_errors()))

True 5
False True

الأعداد صحيحة لكن التساوي يخالف الثابت وينتج خطأ عاما.

from django import forms
from django.contrib.auth.decorators import login_required
from django.shortcuts import redirect, render
from django.views.decorators.http import require_http_methods
from .models import Course

class CourseForm(forms.ModelForm):
    class Meta:
        model = Course
        fields = ["title", "seats"]

@login_required
@require_http_methods(["GET", "POST"])
def create_course(request):
    form = CourseForm(request.POST if request.method == "POST" else None)
    if request.method == "POST" and form.is_valid():
        course = form.save(commit=False)
        course.owner = request.user
        course.save()
        return redirect("course-detail", course_id=course.pk)
    return render(request, "catalog/course_form.html", {"form": form})

Valid authorized POST in the declared app: save with current user as owner, then redirect.

يتطلب المخطط والمسارات والوسيط والقالب وCSRF ويعين الخادم المالك ولا ينفذ المقطع.