Django不调用model clean方法 [英] Django doesn't call model clean method

问题描述

我有一个视图，它从CSV文件创建模型。我已经在模型类定义中添加了干净的方法，但是在创建模型时不会调用。

这里是models.py的示例：

  class Run（models.Model）：
 name = models.CharField（max_length = 120）
 tested_build = models。 ForeignKey（'apps.Build'）
 timestamp_start = models.DateTimeField（）
 timestamp_end = models.DateTimeField（）
 
 class CommonMeasurement（models.Model）：
时间戳= models.DateTimeField（）
 value = models.FloatField（）
 run = models.ForeignKey（运行）
 
 def clean（self）：
 super CommonMeasurement，self）.clean（）
 print'here we go'
 if self.timestamp< self.run.timestamp_start或self.timestamp> self.run.timestamp_end：
 raise django_excetions.ValidationError（'Measurement is outside the run'）
 
 
 class ClientMeasurement（CommonMeasurement）：
 metric = models.ForeignKey （ClientMetric）
 account = models.CharField（max_length = 120，blank = True）
  

<这是我的表单视图代码示例：

  class BaseMeasurementsUpload（generic_views.FormView）：
 template_name ='upload.html '
 models_to_upload = None 
 
 def get_success_url（self）：
 return self.request.get_full_path（）
 
 def form_valid（self，form）： 
 uploader = getattr（importers，form.cleaned_data ['uploader']）
 try：
 the_uploader = uploader（form.cleaned_data，self.models_to_upload）
 upload_results = the_uploader.get_result_info （）
除了django_exceptions.ValidationError为e：
 custom_errors = e 
返回render_to_response（self.template_name，
 {'upload_results'：upload_results，
'custom_errors'：custom_errors}，
 context_instance = RequestContext（self.request））
 
 
 class ClientMeasurementsUploadView（BaseMeasurementsUpload）：
 form_class = forms.ClientMeasurementsUploadForm 
 models_to_upload = models.ClientMeasurement 
 
 def get_form（self，form_class）：
 uploaders = （（'MeasurementsSimpleCsv'，importers.MeasurementsSimpleCsv .__ doc__），
（'ClientMeasurementsBulkCsv'，importers.ClientMeasurementsBulkCsv .__ doc__，））
如果self.request.POST：
＃get bound form 
 return self.form_class（uploaders，
 self.request.POST，
 self.request.FILES）
 else：
返回form.ClientMeasurementsUploadForm（上传者）
  

进口商为每个模型执行实际的验证和调用create方法。 p>

解决方案

我找到了解决方法来覆盖方法：

  class CommonMeasurement（models.Model）：
 timestamp = models.DateTimeField（）
 value = models.FloatField（）
 run = models.ForeignKey（Run）
 
对象= models.Manager（）
 analyze = managers.MeasureStatManager（）
 
 def save（self，** kwargs）：
 self.clean （）
返回超级（CommonMeasurement，self）.save（** kwargs）
 
 def clean（self）：
 super（CommonMeasurement，self）.clean（）
 print'here we go'
 if self.timestamp< self.run.timestamp_start或self.timestamp> self.run.timestamp_end：
 raise django_excetions.ValidationError（'测量超出运行'）
  

但我不知道这可以是一个很好的决定。

I have a view, which creates models from CSV file. I've added clean method to the model class definition, but it isn't called when model is created.

Here is example of models.py:

class Run(models.Model):
    name = models.CharField(max_length=120)
    tested_build = models.ForeignKey('apps.Build')
    timestamp_start = models.DateTimeField()
    timestamp_end = models.DateTimeField()

class CommonMeasurement(models.Model):
    timestamp = models.DateTimeField()
    value = models.FloatField()
    run = models.ForeignKey(Run)

    def clean(self):
        super(CommonMeasurement, self).clean()
        print 'here we go'
        if self.timestamp < self.run.timestamp_start or self.timestamp > self.run.timestamp_end:
            raise django_excetions.ValidationError('Measurement is outside the run')


class ClientMeasurement(CommonMeasurement):
    metric = models.ForeignKey(ClientMetric)
    account = models.CharField(max_length=120, blank=True)

Here is my Form View code examples:

class BaseMeasurementsUpload(generic_views.FormView):
    template_name = 'upload.html'
    models_to_upload = None   

    def get_success_url(self):
        return self.request.get_full_path()

    def form_valid(self, form):
        uploader = getattr(importers, form.cleaned_data['uploader'])
        try:
            the_uploader = uploader(form.cleaned_data, self.models_to_upload)
            upload_results = the_uploader.get_result_info()
        except django_exceptions.ValidationError as e:
            custom_errors = e
        return render_to_response(self.template_name,
                                  {'upload_results': upload_results,
                                   'custom_errors': custom_errors},
                                  context_instance=RequestContext(self.request))


class ClientMeasurementsUploadView(BaseMeasurementsUpload):
    form_class = forms.ClientMeasurementsUploadForm
    models_to_upload = models.ClientMeasurement

    def get_form(self, form_class):
        uploaders = (('MeasurementsSimpleCsv', importers.MeasurementsSimpleCsv.__doc__),
                     ('ClientMeasurementsBulkCsv', importers.ClientMeasurementsBulkCsv.__doc__,))
        if self.request.POST:
            # get bound form
            return self.form_class(uploaders,
                                   self.request.POST,
                                   self.request.FILES)
        else:
            return forms.ClientMeasurementsUploadForm(uploaders)

importers perform actual validation and call create method for each model.

解决方案

I've found a solution to override method:

class CommonMeasurement(models.Model):
    timestamp = models.DateTimeField()
    value = models.FloatField()
    run = models.ForeignKey(Run)

    objects = models.Manager()
    analyzes = managers.MeasureStatManager()

    def save(self, **kwargs):
        self.clean()
        return super(CommonMeasurement, self).save(**kwargs)

    def clean(self):
        super(CommonMeasurement, self).clean()
        print 'here we go'
        if self.timestamp < self.run.timestamp_start or self.timestamp > self.run.timestamp_end:
            raise django_excetions.ValidationError('Measurement is outside the run')

But I'm not sure that it can be a good decision.

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