Help me! Error in Django. Migrate mysql, datetime and more.

[Ricardo Felipe Ríos Higueras]

Hi.

I am learning Django, but, I have major problems because I don´t know much 
about python/Django.

Here this problem:

*problem one : the databases backend does not accept 0 as a ' valueError: 
The databases backend does not accept 0 as value for AutoField.*
*problem two: TypeError: int() argument must be a string or a number, not 
'datetime.datetime'*

Here my models.py


*from __future__ import unicode_literals*
*from django.db import models*
*from django.contrib import admin*
*from django.contrib import **
*from tinymce import models as tinymce_models*
*from PIL import Image*
*from django.contrib.auth.models import User*


*ESTADO_VISIBLE = [1,2]*

*class ManejadorPost(models.Manager):*
* def get_query_set(self):*
* default_queryset = super(ManejadorPost, self).get_query_set()*
* return default_queryset.filter(status__in=ESTADO_VISIBLE)*

*class Categorias(models.Model):*
* nombre = models.CharField(max_length=50)*
* slug = models.SlugField(max_length=50, unique=True, default='slug')*
* descripcion = models.TextField()*

* creada_en = models.DateTimeField(auto_now_add=True)*
* actualizada_al = models.DateTimeField(auto_now=True)*


*class Meta:*
* db_table = 'categorias'*
* verbose_name_plural = 'Categorias'*

*def __unicode__(self):*
* return self.nombre*


*class BlogPost(models.Model):*
* ESTADOS=((1,"Publicado"), (2, 'Archivado'), (3,'Nesecita editarse'), 
(4,'Nesecita aprobacion'))*
* status = models.IntegerField(choices=ESTADOS,default=4)*
* objetos_panel = models.Manager()*
* objects = ManejadorPost()*
* title=models.CharField(max_length=150)*
* author = models.ForeignKey(User)*
* time = models.DateTimeField(auto_now=True)*
* categorias_post = models.ManyToManyField(Categorias)*
* body = tinymce_models.HTMLField()*
* imagen = models.ImageField(upload_to = "photos")*

*class Meta:*
* db_table = 'entradas'*
* verbose_name_plural = 'Posts'*

*def __unicode__(self):*
* return self.title*

*def __unicode__(self):*
* return self.body*



I hope you will join me. 
Thanks....

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# -*- coding: utf-8 -*-
from __future__ import unicode_literals
from django.db import models
from django.contrib import admin
from django.contrib import *
from tinymce import models as tinymce_models
from PIL import Image
from django.contrib.auth.models import User
import time
from datetime import date

# Create your models here.

ESTADO_VISIBLE = [1,2]

class ManejadorPost(models.Manager):
	def get_query_set(self):
		default_queryset = super(ManejadorPost, self).get_query_set()
		return default_queryset.filter(status__in=ESTADO_VISIBLE)

class Categorias(models.Model):
	nombre = models.CharField(max_length=50)
	slug = models.SlugField(max_length=50, unique=True, default='slug')
	descripcion = models.TextField()

	creada_en = date.today()
	actualizada_al = date.today()


class Meta:
	db_table = 'categorias'
	verbose_name_plural = 'Categorias'

def __unicode__(self):
	return self.nombre


class BlogPost(models.Model):
	ESTADOS=((1,"Publicado"), (2, 'Archivado'), (3,'Nesecita editarse'), (4,'Nesecita aprobacion'))
	status = models.IntegerField(choices=ESTADOS,default=4)
	objetos_panel = models.Manager()
	objects = ManejadorPost()
	title=models.CharField(max_length=150)
	author = models.ForeignKey(User)
	time = date.today()
	categorias_post = models.ManyToManyField(Categorias)
	body = tinymce_models.HTMLField()
	imagen = models.ImageField(upload_to = "photos")

class Meta:
	db_table = 'entradas'
	verbose_name_plural = 'Posts'

def __unicode__(self):
	return self.title

def __unicode__(self):
	return self.body