Taşıma Django form.save() ValueError

Question

Django hata işlemcisinin yeni üyesiyim ve bir hafta boyunca Django formlarını kullanarak bir MySQL tablosunu güncellemeye çalışırken tam olarak neyin yanlış gittiğini anlamaya çalıştım. Ben ValueError: invalid literal for int() with base 10: '\x01' hatası ile biter. Hatalı kodu, catch catch bloğu yakalama valueError ve satır sql sorgusuyla silmeyi denedim, ve işte şunu elde ettim.

kodu:

def updateTask(request, task_id): 
#cur_usr_sale_point = PersonUnique.objects.filter(employees__employeeuser__auth_user = request.user.id).values_list('agreementemployees__agreement_unique__sale_point_id',flat=True) 
selected_task = Tasks.objects.get(id=task_id)  
responsible_people = TaskResponsiblePeople.objects.get(task_id = task_id) 
task_table = Tasks. objects.all() 
if request.method == 'POST': 
    task_form = TaskForm(request.POST,instance=selected_task) 
    responsible_people_form = TaskResponsiblePeopleForm(request.POST, instance = responsible_people) 
    if task_form.is_valid() and responsible_people_form.is_valid(): 
     responsible_people_instance = responsible_people_form.save(commit=False) 
     try: 
      responsible_people_instance.task = task_form.save() 
      responsible_people_form.save() 
     except ValueError: 
      from django.db import connection 
      print connection.queries[-1] 
     return HttpResponseRedirect(reverse('task_list')) 

Baskı bana kesinlikle geçerli MySQL Select-deyimi verir (benim surpise için, ben bir güncelleme-ekstre beklenen). try-catch bloğu olmadan

geri izleme:

Internal Server Error: /task_list/update_task/200/ 
Traceback (most recent call last): 
    File "C:\Python27\lib\site-packages\django\core\handlers\base.py", line 149, in get_response 
    response = self.process_exception_by_middleware(e, request) 
    File "C:\Python27\lib\site-packages\django\core\handlers\base.py", line 147, in get_response 
    response = wrapped_callback(request, *callback_args, **callback_kwargs) 
    File "\\10.8.0.1\share\djprj\djprj\djprj\task\views.py", line 101, in updateTask 
    task_form.save(); 
    File "C:\Python27\lib\site-packages\django\forms\models.py", line 451, in save 
    self.instance.save() 
    File "C:\Python27\lib\site-packages\django\db\models\base.py", line 700, in save 
    force_update=force_update, update_fields=update_fields) 
    File "C:\Python27\lib\site-packages\django\db\models\base.py", line 728, in save_base 
    updated = self._save_table(raw, cls, force_insert, force_update, using, update_fields) 
    File "C:\Python27\lib\site-packages\django\db\models\base.py", line 793, in _save_table 
    forced_update) 
    File "C:\Python27\lib\site-packages\django\db\models\base.py", line 843, in _do_update 
    return filtered._update(values) > 0 
    File "C:\Python27\lib\site-packages\django\db\models\query.py", line 645, in _update 
    return query.get_compiler(self.db).execute_sql(CURSOR) 
    File "C:\Python27\lib\site-packages\django\db\models\sql\compiler.py", line 1149, in execute_sql 
    cursor = super(SQLUpdateCompiler, self).execute_sql(result_type) 
    File "C:\Python27\lib\site-packages\django\db\models\sql\compiler.py", line 837, in execute_sql 
    sql, params = self.as_sql() 
    File "C:\Python27\lib\site-packages\django\db\models\sql\compiler.py", line 1117, in as_sql 
    val = field.get_db_prep_save(val, connection=self.connection) 
    File "C:\Python27\lib\site-packages\django\db\models\fields\__init__.py", line 728, in get_db_prep_save 
    prepared=False) 
    File "C:\Python27\lib\site-packages\django\db\models\fields\__init__.py", line 720, in get_db_prep_value 
    value = self.get_prep_value(value) 
    File "C:\Python27\lib\site-packages\django\db\models\fields\__init__.py", line 1853, in get_prep_value 
    return int(value) 
ValueError: invalid literal for int() with base 10: '\x01' 
[10/Apr/2016 11:15:46] "POST /task_list/update_task/200/ HTTP/1.1" 500 126245 

bana lütfen yardım edin !!!

DÜZENLEME: katma is_valid yöntem

Önce formun is_valid yöntemi kullanmak gerekir

Answer 1

:

bir form örneği tüm alanlar için doğrulama rutinleri çalışan bir is_valid() yöntemi vardır. Bu yöntem çağrıldığında, tüm alanlar geçerli veri içeriyorsa.

from django.shortcuts import render 
from django.http import HttpResponseRedirect 
from .forms import NameForm 

def get_name(request): 
    # if this is a POST request we need to process the form data 
    if request.method == 'POST': 
     # create a form instance and populate it with data from the request: 
     form = NameForm(request.POST) 
     # check whether it's valid: 
     if form.is_valid(): 
      # process the data in form.cleaned_data as required 
      # ... 
      # redirect to a new URL: 
      return HttpResponseRedirect('/thanks/') 

    # if a GET (or any other method) we'll create a blank form 
    else: 
     form = NameForm() 

    return render(request, 'name.html', {'form': form}) 

Kaynak: Django Docs: Working with forms

Ben yukarıdaki belgelere okumanızı öneriyoruz.