所以我在views.py中有以下功能:
def recipe_edit(request, pk):
recipe = get_object_or_404(Recipe, pk=pk)
if request.method == "POST":
initial = {'title': recipe.title, 'description': recipe.description}
form = RecipeForm(request.POST, initial=initial)
if form.is_valid():
current_user = request.user
data = form.cleaned_data
recipe_data=Recipe.objects.create(user=current_user, title=data['title'], description=data['description'])
recipe_data.save( force_insert=False, force_update=False, using=None)
return HttpResponseRedirect('recipe_detail', pk=recipe.pk)
else:
initial = {'title': recipe.title, 'description': recipe.description}
form = RecipeForm(initial=initial)
return render(request, 'recipe_edit.html', {'form': form, 'recipe':recipe})
但是当我提交表单时,它实际上创建了一条新记录,而不是编辑旧记录。有任何建议如何更新旧记录而不是创建新记录?
答案 0 :(得分:3)
您应该明白,您在is_valid块中专门调用create
,因此您自然会创建一条记录。但是,通过这样做,您可以绕过模型形式为您提供的所有帮助。
您应该通过initial
,而不是传递instance
;然后在is_valid块中,您应该调用form.save
。
def recipe_edit(request, pk):
recipe = get_object_or_404(Recipe, pk=pk)
if request.method == "POST":
form = RecipeForm(request.POST, instance=recipe)
if form.is_valid():
recipe = form.save(commit=False)
recipe.user = request.user
recipe.save()
return redirect('recipe_detail', pk=recipe.pk)
else:
form = RecipeForm(instance=recipe)
return render(request, 'recipe_edit.html', {'form': form, 'recipe':recipe})
答案 1 :(得分:0)
使用
行Ti.App.addEventListener('resume', function(){
Ti.API.log("resume event triggered");
});
Ti.App.addEventListener('pause', function(){
Ti.API.log("paused event triggered");
});
您正在创建并保存新实例。
当您在recipe_data=Recipe.objects.create(user=current_user, title=data['title'], description=data['description'])
recipe_data.save( force_insert=False, force_update=False, using=None)
处获得旧配方时,要更新它,您只需要用以下内容替换这些行:
recipe