django页面form添加和编辑

文章转载于 https://my.oschina.net/u/2723480/blog/702874

现在要实现一个form的添加和编辑，就是说对一个数据库表的操作

def log(request,id=0):
    assert isinstance(request, HttpRequest)
    if request.method == 'POST':
        form = app.forms.LogForm(request.POST)
        if form.is_valid():
            id = form.data['id']
            if id:
                model = app.models.ChangeLog.objects.get(id=id)
            else:
                model = app.models.ChangeLog()
            model.serial_number = form.cleaned_data['serial_number']
            model.name = form.cleaned_data['name']
            model.type = form.cleaned_data['type']
            model.remark = form.cleaned_data['remark']
            model.save()            
        id = 0
    else:
        if id:
            form = app.forms.LogForm(instance = app.models.ChangeLog.objects.get(id=id))
        else:
            form = app.forms.LogForm()
    return render(request,'app/log.html',{
            'title': '变更记录',
            'form': form, #获得表单对象
            'data':app.models.ChangeLog.objects.all(),
            'id': id
            })

重点关注 form = app.forms.LogForm(instance = app.models.ChangeLog.objects.get(id=id))，通过模型实例化表单，可以实现文章再编辑