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INSERT INTO producto (nombre, atributos) VALUES (
    'Bicicleta',
    'color    => "verde",
     ruedas   => 2,
     tipo     => "monareta"'
    );

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-- Obtener las llaves como arreglo
SELECT nombre, akeys(atributos) FROM producto;

-- Saber si un producto tiene cierta característica
SELECT nombre, atributos -> talla FROM producto WHERE atributos ? 'talla';

-- Obtener el conjunto de características y sus valores para un producto
SELECT each(atributos) FROM producto  WHERE name='pizza';

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img {
    -webkit-transition: -webkit-filter 1s;
    -webkit-filter: grayscale(1);  /* Chrome */
    filter: url(filters.svg#grayscale); /* Firefox 3.5+ */
    filter: gray; /* IE6-9 */
}
img:hover {
    -webkit-filter: grayscale(0); /* Chrome */
    filter: none; /* Applies to FF + IE */
}

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pip install django-autocomplete-light

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url(r'autocomplete/', include('autocomplete_light.urls')),

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import autocomplete_light
autocomplete_light.autodiscover()

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{% extends "admin/base.html" %}

{% block extrahead %}
    <script src="https://ajax.googleapis.com/ajax/libs/jquery/1.7.2/jquery.min.js" type="text/javascript"></script>
    {% include 'autocomplete_light/static.html' %}
{% endblock %}

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import autocomplete_light

from cities_light.models import City

autocomplete_light.register(City, search_fields=('search_names',),
    autocomplete_js_attributes={'placeholder': 'city name ..'})

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from django.contrib import admin

import autocomplete_light

from models import Address

class AddressAdmin(admin.ModelAdmin):
    form = autocomplete_light.modelform_factory(Address)

admin.site.register(Address, AddressAdmin)

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class CartSale(models.Model):
    first_name = models.CharField(
        max_length=100,
    )
    last_name = models.CharField(
        max_length=100,
    )
    date_sale = models.DateTimeField(
        auto_now_add=True,
    )