On Fri, Jul 10, 2009 at 6:08 PM, Michael <newmani...@gmail.com> wrote:
> On Fri, Jul 10, 2009 at 5:54 PM, sjtirtha <sjtir...@gmail.com> wrote:
>
>> Hi,
>>
>> I have a problem calling manage.py syncdb for my models.
>> Here is my models:
>> from django.db import models
>> from django.contrib.auth.models import User
>>
>> # Create your models here.
>> class DocumentType(models.Model):
>> name = models.CharField(max_length=20, unique=True)
>> description = models.CharField(max_length=200)
>> assignedType = models.ForeignKey('self')
>>
>> class Category(models.Model):
>> name = models.CharField(max_length=20, unique=True)
>> type = DocumentType()
>> relatedCategories = models.ForeignKey('self',
>> related_name='relatedCategories')
>> description = models.CharField(max_length=200)
>>
>> class Document(models.Model):
>> type = DocumentType()
>> viewed = models.PositiveIntegerField(max_length=7)
>> #rating =
>> #ranking =
>> created_by = User()
>> changed_by = User()
>> created_at = models.DateTimeField()
>> changed_at = models.DateTimeField()
>> categories = models.ManyToManyField(Category,
>> related_name='categories') #n to m relationship
>> assignedDocuments = models.ForeignKey('self',
>> related_name='assignedDocuments')
>> parentDocument = models.ForeignKey('self',
>> related_name='parentDocument') #1 to n relationship
>>
>> The error that I got is:
>> Error: One or more models did not validate:
>> common.category: Accessor for field 'relatedCategories' clashes with field
>> 'Category.relatedCategories'. Add a related_name argument to the definition
>> for 'relatedCategories'.
>> common.category: Reverse query name for field 'relatedCategories' clashes
>> with field 'Category.relatedCategories'. Add a related_name argument to the
>> definition for 'relatedCategories'.
>> common.document: Accessor for field 'assignedDocuments' clashes with field
>> 'Document.assignedDocuments'. Add a related_name argument to the definition
>> for 'assignedDocuments'.
>> common.document: Reverse query name for field 'assignedDocuments' clashes
>> with field 'Document.assignedDocuments'. Add a related_name argument to the
>> definition for 'assignedDocuments'.
>> common.document: Accessor for field 'parentDocument' clashes with field
>> 'Document.parentDocument'. Add a related_name argument to the definition for
>> 'parentDocument'.
>> common.document: Reverse query name for field 'parentDocument' clashes
>> with field 'Document.parentDocument'. Add a related_name argument to the
>> definition for 'parentDocument'.
>>
>> What is wrong with my model.
>>
>
> You have related name conflicts. Read about it in the docs:
> http://docs.djangoproject.com/en/dev/topics/db/models/#be-careful-with-related-name
>
> Hope that helps,
>
> Mn
>
Could help if I look at the links I send out. Any way, you need to specify a
unique related_name:
http://docs.djangoproject.com/en/dev/ref/models/fields/#foreign-key-arguments
this is so you can properly have reverse relations as are described here:
http://docs.djangoproject.com/en/dev/topics/db/queries/#backwards-related-objects
Hope that really helps,
Mn
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