First, make sure that the whitespace is the same in all of your methods (in
python whitespace is significant, which means that you should indent all
files the same amount, I wrote my example in my email, so I only indented
twice, you seem to have 4 blankspaces in your file, so make sure the
indentation is the same).
Secondly, I think that you should add the code I sent to the __init__.py
file in the project itself (in the same directory that you have you
models.py). That way it will be run during startup (which needs to be done).
Regards,
Andréas
2015-03-24 14:20 GMT+01:00 Akash Patni <akash.pa...@ranosys.com>:
> i had made the changes in model .py but its not working
>
> here is model.py
>
>
> from django.db import models
> import django.forms as forms
> from virtualenv import REQUIRED_FILES
> from _mysql import NULL
> from datetime import datetime, date, time, timedelta
> import time
> import calendar
> from django.contrib.auth.models import User
> import os
> from uuid import uuid4
> from django.core.files.storage import default_storage as storage
> from django.db.models.signals import pre_save
>
>
> def path_and_rename(path):
> def wrapper(instance, filename):
> ext = filename.split('.')[-1]
> # get filename
> if instance.pk:
> filename = '{}.{}'.format(instance.pk, ext)
> else:
> # set filename as random string
> filename = '{}.{}'.format(uuid4().hex, ext)
> # return the whole path to the file
> return os.path.join(path, filename)
> return wrapper
>
> def image_delete(sender, instance, *args, **kwargs):
> if instance.pk:
> old_instance = User.objects.get(pk=instance.pk)
>
> if old_instance.image != instance.image and instance.image:
> storage.delete(old_instance.image.name)
>
> pre_save.connect(image_delete, sender=User)
>
> class Publisher(models.Model):
> name = models.CharField(max_length=30)
> address = models.CharField(max_length=50)
> city = models.CharField(max_length=60)
> state_province = models.CharField(max_length=30)
> country = models.CharField(max_length=50)
> website = models.URLField()
>
> def __unicode__(self):
> return self.name
>
> class Author(models.Model):
> first_name = models.CharField(max_length=30)
> last_name = models.CharField(max_length=40)
> email = models.EmailField()
>
> def __unicode__(self):
> return u'%s %s' % (self.first_name, self.last_name)
>
> class Book(models.Model):
> title = models.CharField(max_length=100)
> authors = models.ManyToManyField(Author)
> publisher = models.ForeignKey(Publisher)
> publication_date = models.DateField()
>
> def __unicode__(self):
> return self.title
>
> class User(models.Model):
> first_name=models.CharField(verbose_name = "First Name
> *",max_length=20,blank=False)
> last_name=models.CharField(verbose_name = "Last Name
> *",max_length=20,blank=False)
> username=models.EmailField(verbose_name = "Email
> *",max_length=30,blank=False)
> password=models.CharField(verbose_name = "Password
> *",max_length=15,blank=False)
> dob=models.DateField(verbose_name = "DOB *" ,blank=True,null=True)
> mobileno=models.CharField(verbose_name = "Mobile No
> *",max_length=20,blank=False)
> houseno=models.CharField(verbose_name = "House
> No",max_length=10,blank=True)
> address1=models.CharField(verbose_name =
> "Adress1",max_length=30,blank=True)
> city=models.CharField(verbose_name = "City",max_length=20,blank=True)
> state=models.CharField(verbose_name = "State",max_length=30,blank=True)
> pincode=models.CharField(verbose_name =
> "Pincode",max_length=20,blank=True)
> country=models.CharField(verbose_name =
> "Country",max_length=30,blank=True)
> comment=models.CharField(verbose_name =
> "Comment",max_length=200,blank=True)
> sex=models.CharField(verbose_name = "Sex *",max_length=5,blank=False)
> image=models.FileField(verbose_name = "Image(limit 1Mb)
> *",blank=True,upload_to=path_and_rename(''))
>
> def __unicode__(self):
> return self.first_name
>
>
>
>
> On Tue, Mar 24, 2015 at 6:47 PM, Akash Patni <akash.pa...@ranosys.com>
> wrote:
>
>> is there any other changes that i have to made in model like how this
>> above mentioned function will be call.
>>
>> Please suggest
>>
>> On Tue, Mar 24, 2015 at 6:43 PM, Andreas Kuhne <
>> andreas.ku...@suitopia.com> wrote:
>>
>>> Hi,
>>>
>>> You shouldn't do it in the view, do it in the database model instead. It
>>> won't do anything to any other fields than the image field the way I wrote
>>> the function (all other fields are untouched).
>>>
>>> The reason you shouldn't do it in the view, is because if you were to
>>> update the image any other place than via the view, the code wouldn't run.
>>> It's more sensible and more DRY to do it in the model.
>>>
>>> Regards,
>>>
>>> Andréas
>>>
>>> 2015-03-24 14:10 GMT+01:00 Akash Patni <akash.pa...@ranosys.com>:
>>>
>>>> Hey,
>>>> I am new to django. I have other feilds also other than image field in
>>>> my form, so will you please tell me how to use above mentioned function in
>>>> edit_profile function in view, Can i call another function from another
>>>> function in views.py, if yes please tell me
>>>>
>>>> On Tue, Mar 24, 2015 at 6:11 PM, Andreas Kuhne <
>>>> andreas.ku...@suitopia.com> wrote:
>>>>
>>>>> Hi,
>>>>>
>>>>> Ok, so what you should do is add a signal to pre save and then delete
>>>>> the old image if the new image is attached.
>>>>>
>>>>> Something like this should work:
>>>>>
>>>>> from django.core.files.storage import default_storage as storage
>>>>> from django.db.models.signals import pre_save
>>>>>
>>>>>
>>>>> def image_delete(sender, instance, *args, **kwargs):
>>>>> if instance.pk:
>>>>> old_instance = User.objects.get(pk=instance.pk)
>>>>>
>>>>> if old_instance.image != instance.image and instance.image:
>>>>> storage.delete(old_instance.image.name)
>>>>>
>>>>> pre_save.connect(image_delete, sender=User)
>>>>>
>>>>> You can see more information about signals here:
>>>>> https://docs.djangoproject.com/en/1.7/topics/signals/
>>>>>
>>>>> Regards,
>>>>>
>>>>> Andréas
>>>>>
>>>>> 2015-03-24 11:40 GMT+01:00 <akash.pa...@ranosys.com>:
>>>>>
>>>>>> When i edit image that is when i upload new image,the old image
>>>>>> should get deleted
>>>>>>
>>>>>> On Tuesday, March 24, 2015 at 2:40:35 PM UTC+5:30,
>>>>>> akash...@ranosys.com wrote:
>>>>>>>
>>>>>>> hi..
>>>>>>> Can anyone please tell me how to handle old image after uploading
>>>>>>> new image.
>>>>>>>
>>>>>> --
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>>>>>>
>>>>>
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>>>>>
>>>>
>>>>
>>>>
>>>> --
>>>> *Best Regards,*
>>>> Akash Patni
>>>> Software Engineer
>>>>
>>>>
>>>>
>>>>
>>>> *[image: ranosys] <http://ranosys.com/> [image: facebook]
>>>> <https://www.facebook.com/ranosys>[image: twitter]
>>>> <https://twitter.com/ranosys>[image: linkedin]
>>>> <https://www.linkedin.com/company/741079?trk=prof-exp-company-name>[image:
>>>> googleplus] <https://plus.google.com/+Ranosys> Head Office: Oxley Bizhub,
>>>> #06-48 | 73 Ubi Road 1 | Singapore - 408733Tel: +65 66331556 | HP: +65
>>>> 98573420Global Offices:San Francisco, USA | Jaipur, India | Bikaner, India*
>>>>
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>>>
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>>
>>
>>
>> --
>> *Best Regards,*
>> Akash Patni
>> Software Engineer
>>
>>
>>
>>
>> *[image: ranosys] <http://ranosys.com/> [image: facebook]
>> <https://www.facebook.com/ranosys>[image: twitter]
>> <https://twitter.com/ranosys>[image: linkedin]
>> <https://www.linkedin.com/company/741079?trk=prof-exp-company-name>[image:
>> googleplus] <https://plus.google.com/+Ranosys> Head Office: Oxley Bizhub,
>> #06-48 | 73 Ubi Road 1 | Singapore - 408733Tel: +65 66331556 | HP: +65
>> 98573420Global Offices:San Francisco, USA | Jaipur, India | Bikaner, India*
>>
>
>
>
> --
> *Best Regards,*
> Akash Patni
> Software Engineer
>
>
>
>
> *[image: ranosys] <http://ranosys.com/> [image: facebook]
> <https://www.facebook.com/ranosys>[image: twitter]
> <https://twitter.com/ranosys>[image: linkedin]
> <https://www.linkedin.com/company/741079?trk=prof-exp-company-name>[image:
> googleplus] <https://plus.google.com/+Ranosys> Head Office: Oxley Bizhub,
> #06-48 | 73 Ubi Road 1 | Singapore - 408733Tel: +65 66331556 | HP: +65
> 98573420Global Offices:San Francisco, USA | Jaipur, India | Bikaner, India*
>
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>
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