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=========
Django QR
=========
Information
===========
Django QR is a simple Django application that provides some templatetags
that allows to include automatically QR codes on the Django site.
Installation
============
Once is installed from PyPI, you just need to add it to your settings as
'qrcode':
::
INSTALLED_APPS = (..., 'qrcode', ...)
Usage
=====
Its usage is very simple. You just need to use the templatetag as follows:
::
{% load qr_tags %}
...
{% qr_from_text "text" "size" %}
or
{% qr_from_mail "mail_address" "size" %}
Example when looping on a list of QR codes to generate::
{% for qrcode in qrcode_list %}
<p class="qrcodeImage">{% qr_from_text "text" "size" %}
{% endfor %}
Where:
* Size is not mandatory, and defines the dimensions of the QR code as following: 's' (120x120 pixels), 'm' (230x230 pixels), 'l' (350x350) or an integer with the size that you want to give to the QR-code (like 40, 80 or 500). Any other option will be ignored and will use 'm' as default.
* qr_from_mail tag just add a simple "mailto:" at the beggining, because some qr scanners can detect that as an email address in order to send it an email.
QR-code for contact information
-------------------------------
There's also a templatetag to render a QR-code that allows to store
some contact information, such as name, phone number, email address or
our company name.
Its usage is similiar to the basics:
::
{% qr_from contact contact "size" %}
Where:
* Size is the same as previously
* contact should be a Python dictionary (or any other hash structure) that could contain the following elements:
* *name* - Complete name
* *phone_number*
* *email*
* *url* - some url address, your blog or personal webpage
* *company*
For instance, you could create a contact dictionary like the following:
::
contact = {
'name': 'Pablo Recio',
'phone_number': '00000000',
'email': 'foo@example.com',
'url': 'http://www.zocolab.es',
'company': 'Zocolab',
}
QR-code of Django object URL
----------------------------
Another templatetag can be used to render a QR-code that links to a Django object URL. As
the previous templatetags, the usage is very simple:
::
{% qr_from_object object "size" %}
Where:
* Size is the same as previously
* Object it's an instance of a Django model, that must implements the 'get_absolute_url' method in order to get the object's address.
Change service for QR generating
--------------------------------
By default, django-qr uses Google Chart for generating the QR-code. But this can be changed with a new template. The default
template *qrcode/qr_tag.html* contains the following:
::
<img src="http://chart.googleapis.com/chart?cht=qr&chs={{ size }}x{{ size }}&chl={{ text }}" />
But if you want to use some other service, like *qrserver*, you just need to add a new template in your templates dirs with
the following code:
::
<img src="http://api.qrserver.com/v1/create-qr-code/?size={{ size }}x{{ size }}&data={{ text }}" />
The idea is that your *qrcode/qr_tag.html* contains an img tag and the call to the service that you want, mantaining the
variables *size* and *data*.