本文介绍了Django不调用model clean方法的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
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)
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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