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from django.db import models
from django.contrib.auth import get_user_model
from django.utils.translation import ugettext_lazy as _

from baseapp.models import AbstractDateTimeBaseModel

from localflavor.br.br_states import STATE_CHOICES

# Create your models here.

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print('código com erro')

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import psycopg2


class ConexaoDB:

    def conectar(self):
        conexao = psycopg2.connect(
            host='localhost',
            database='senacwebdb',
            user='senacwebuser',

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select m.id as matricula, a.nome as aluno, c.nome as curso, m.data_matricula as data_matricula 
from matricula as m left join aluno as a on m.aluno_id = a.id 
left join curso as c on m.curso_id = c.id;

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class BannerHome(models.Model):
    title = models.CharField(verbose_name=_('Título do banner'), max_length=150)
    description = models.TextField(verbose_name=_('Descrição'), null=True, blank=True, help_text=_('Opcional'))
    image = models.ImageField(verbose_name=_('Banner'), upload_to='banners/home')

    class Meta:
        verbose_name = _('Banner Página Inicial')
        verbose_name_plural = _('Banners Página Inicial')

    def __str__(self):

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# models.py
class User(AbstractBaseUser, PermissionsMixin):
    username_validator = UnicodeUsernameValidator()

    id = models.UUIDField(verbose_name=_('ID'), primary_key=True, default=uuid.uuid4, editable=False)
    username = models.CharField(
        _('Usuário'),
        max_length=150,
        unique=True,
        help_text=_('Obrigatório. 150 caracteres ou menos. Letras, números e os símbolos @/./+/-/_ são permitidos.'),

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class Customer(models.Model):
    content_type = models.ForeignKey(ContentType, on_delete=models.CASCADE)
    object_id = models.IntegerField()
    content_object = GenericForeignKey()


class Individual(models.Model):
    user = models.ForeignKey(User, on_delete=models.CASCADE)
    name = models.CharField('Nome', max_length=200)
    brazilian_cpf = models.CharField('CPF', max_length=14, unique=True, blank=True, null=True)

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def user_login(request):
    template_name = 'accounts/login.html'
    if request.method == 'POST':
        form = UserLogin(request.POST)
        if form.is_valid():
            username = form.cleaned_data['username']
            password = form.cleaned_data['password']
            user = authenticate(request, username=username, password=password)
            if user is not None:
                login(request, user)

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import math
math.sqrt(9)

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def clean(self):
        model = self.__class__
        if model.objects.count() > 0 and self.id != model.objects.get().id:
            raise ValidationError("Você já tem um perfil cadastrado.")