Issue Django, in insert session login user data in database?

Actually I want to insert session login user data in database but I when I put this code I get all register user in Dropdown but I want to only current login user data not all and also I want to hide this field value.please help.

model.py

from django.conf import settings  from django.core.urlresolvers import reverse  from django.db import models  from django.db.models.signals import post_save  from django.contrib.auth.models import User           class Product(models.Model):  title = models.CharField(max_length=120)  description = models.TextField(null=True, blank=True,max_length=200)  category = models.ManyToManyField(Category, null=True, blank=True)  price = models.DecimalField(decimal_places=2, max_digits=100, default=29.99)  sale_price = models.DecimalField(decimal_places=2, max_digits=100,\                                              null=True, blank=True)  slug = models.SlugField(unique=True)  timestamp = models.DateTimeField(auto_now_add=True, auto_now=False)  updated = models.DateTimeField(auto_now_add=False, auto_now=True)  active = models.BooleanField(default=True)  update_defaults = models.BooleanField(default=False)  user = models.ForeignKey(User)        def __unicode__(self):      return self.title    class Meta:      unique_together = ('title', 'slug')    def get_price(self):      return self.price    def get_absolute_url(self):      return reverse("single_product", kwargs={"slug": self.slug})

view.py

class DealsForm(ModelForm):  class Meta:      model = Product        fields = ['title','description','category','price','sale_price','slug','active','update_defaults','user']

last field user where I want to Insert current session login user data..how..?

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