django-models

问题 I got a model field object using field_object = MyModel._meta.get_field(field_name) . How can I get the value (content) of the field object? 回答1: Use value_from_object: field_name = 'name' obj = MyModel.objects.first() field_object = MyModel._meta.get_field(field_name) field_value = field_object.value_from_object(obj) Which is the same as getattr : field_name = 'name' obj = MyModel.objects.first() field_object = MyModel._meta.get_field(field_name) field_value = getattr(obj, field_object

问题 I have been trying to post data in my Django application using ajax post. The data is getting saved but in the terminal I am coming up against the following error: AttributeError: 'ModelFormOptions' object has no attribute 'concrete_model' Here are the relevant codes intended to achieve my goal: Views.py: def saveMaterial(request): if request.is_ajax and request.method == "POST": form = CreateMaterialForm(request.POST) # It's a ModelForm mat_bom_list = CreateBomMatListFormset(request.POST,

问题 I have been trying to post data in my Django application using ajax post. The data is getting saved but in the terminal I am coming up against the following error: AttributeError: 'ModelFormOptions' object has no attribute 'concrete_model' Here are the relevant codes intended to achieve my goal: Views.py: def saveMaterial(request): if request.is_ajax and request.method == "POST": form = CreateMaterialForm(request.POST) # It's a ModelForm mat_bom_list = CreateBomMatListFormset(request.POST,

问题 I have been trying to post data in my Django application using ajax post. The data is getting saved but in the terminal I am coming up against the following error: AttributeError: 'ModelFormOptions' object has no attribute 'concrete_model' Here are the relevant codes intended to achieve my goal: Views.py: def saveMaterial(request): if request.is_ajax and request.method == "POST": form = CreateMaterialForm(request.POST) # It's a ModelForm mat_bom_list = CreateBomMatListFormset(request.POST,

问题 I have been trying to post data in my Django application using ajax post. The data is getting saved but in the terminal I am coming up against the following error: AttributeError: 'ModelFormOptions' object has no attribute 'concrete_model' Here are the relevant codes intended to achieve my goal: Views.py: def saveMaterial(request): if request.is_ajax and request.method == "POST": form = CreateMaterialForm(request.POST) # It's a ModelForm mat_bom_list = CreateBomMatListFormset(request.POST,

问题 I am using Django filter and using it in normal view it is working as expected now I want to download the filtered data so for this I am writing one download view where I am trying to use the same FilterClass but no luck. It is giving me an ERROR( Exception Value: type object 'CTSFilter' has no attribute 'values_list' ). Can anyone please help/suggest how to use filtered queryset in filter class more than one view OR pass the data of filtered query to the download views. Please find my code.

问题 Reverse for 'blog_detail' with no arguments not found. Reverse for 'blog_detail' with no arguments not found. 1 pattern(s) tried: ['blog/(?P[0-9]+)$'] models.py class Blog(models.Model): author = models.ForeignKey(settings.AUTH_USER_MODEL, on_delete=models.CASCADE) title = models.CharField(max_length=80) slug = models.SlugField(max_length=80, unique=True, db_index=True, blank=True, null=True) description = models.TextField(max_length=1080, blank=True, null=True) image = models.ImageField

问题 Reverse for 'blog_detail' with no arguments not found. Reverse for 'blog_detail' with no arguments not found. 1 pattern(s) tried: ['blog/(?P[0-9]+)$'] models.py class Blog(models.Model): author = models.ForeignKey(settings.AUTH_USER_MODEL, on_delete=models.CASCADE) title = models.CharField(max_length=80) slug = models.SlugField(max_length=80, unique=True, db_index=True, blank=True, null=True) description = models.TextField(max_length=1080, blank=True, null=True) image = models.ImageField

问题 I have two models, field of one of them pointing to the other as shown below: class Group(models.Model): group_company_id = models.CharField(primary_key=True, ...) class Company(models.Model): company_id = models.CharField(primary_key=True, ...) group_company = models.ForeignKey(Group, related_name="related_grp_company", ...) I am trying to get all the Companies that have been created for a particular Group . So I am trying to get the company_id (and other) values in Djnago UpdateView as a

问题 when i add new record from admin panel it should appear in html page , but it doesn't do that how to fix it models.py : class BestArticals(models.Model): name = models.CharField(max_length=240) url = models.URLField(default="",max_length=240) image = models.ImageField(upload_to='images/',null=True, blank=True) def get_image(self): if self.image and hasattr(self.image, 'url'): return self.image.url else: return '/path/to/default/image' def __str__(self): return self.name views.py : from