invalid literal for int() with base 10: '' using FormSet with File Upload

[Néstor Boscán]

Hi Django Forum

I'm working on a web application that has a page with form set that requires file upload. When I upload the files I get:

Django Version:	1.9.1
Exception Type:	ValueError
Exception Value:	invalid literal for int() with base 10: ''
Exception Location:	C:\desarrollo\Python27\lib\site-packages\django\db\models\fields\__init__.py in get_prep_value, line 976
Python Executable:	C:\desarrollo\Python27\python.exe
Python Version:	2.7.3

On this line of code:

study_form_set = DiagnosticStudyFormSet(request.POST, request.FILES, prefix='studies', queryset=DiagnosticStudy.objects.filter(diagnostic__id=pk))

My model:

class DiagnosticStudy(models.Model):

    id = models.AutoField(primary_key=True)

    name = models.CharField(verbose_name='Name', max_length=255)

    link = models.CharField(verbose_name='Link', max_length=255, blank=True, null=True)

    path = models.FileField(upload_to='files', max_length=255, blank=True, null=True)

    diagnostic = models.ForeignKey(Diagnostic, blank=True, null=True)

    study_type = models.ForeignKey(StudyType, blank=True, null=True)

    class Meta:

        managed = False

        db_table = 't_udm_diagnostic_study'

My forms:

class DiagnosticStudyForm(ModelForm):

    class Meta(object):

        model = DiagnosticStudy

        fields = [ 'id', 'name', 'link', 'path', 'study_type' ]

        widgets = {

   'id': HiddenInput(attrs={ 'class': 'campo' }),

        'name': TextInput(attrs={ 'class': 'campo', 'size': '40', 'onchange': 'validate(this)' }),

'link': TextInput(attrs={ 'class': 'campo', 'size': '40', 'onchange': 'validate(this)' }),

'path': FileInput(attrs={ 'class': 'campo', 'size': '40', 'accept': 'image/gif,image/jpeg,image/pjpeg,image/png,image/tiff,image/x-tiff,application/msword,application/vnd.openxmlformats-officedocument.wordprocessingml.document,application/vnd.ms-powerpoint,application/vnd.openxmlformats-officedocument.presentationml.presentation', 'onchange': 'validate(this)' }),

'study_type': HiddenInput(attrs={ 'class': 'campo', 'size': '40', 'onchange': 'validate(this)' }),

        }

DiagnosticStudyFormSet = modelformset_factory(DiagnosticStudy, form=DiagnosticStudyForm, extra=5, can_delete=True)

The Form does not have a IntegerField only CharFields and ForeignKeys. Any ideas on how to know which field is generating the error?

Regards,

Néstor

[Luis Zárate]

What is the value of pk in

study_form_set = DiagnosticStudyFormSet(request.POST, request.FILES, prefix='studies', queryset=DiagnosticStudy.objects.filter(diagnostic__id=pk)). ?

Is pk an int?  try print type(pk)

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