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How to index binary files in django haystack

Now we are going to index text content which is stored in structured files such as PDFs, Microsoft Office documents, images, etc using haystack and sorl's

In order to read and store the data, we can use SearchBackend.extract_file_contents(self, file_obj) method. It takes the file object, returns a dictionary containing two keys: metadata and contents. The contents value will be a string containing all of the text which the backend managed to extract from the file contents.

Django search with haystack and whoosh

Haystack is a Django plugin to allow text search, while Whoosh is a pure Python search backend and it provides a library of classes and functions for indexing text and then searching the index. It allows you to develop custom search engines for your content.

Generating PDF Files in Python using xhtml2pdf

There are many ways for generating PDF in python. In this post I will be presenting PDF files generation with xhtml2pdf.

xhtml2pdf: xhtml2pdf is a HTML/CSS to PDF converter written in Python and therefore platform independent. xhtml2pdf supports for frameworks like Django and simple integration into Python programs. It is also usable as stand alone command line tool.

pisa: pisa is a html2pdf converter using the ReportLab Toolkit, the HTML5lib and pyPdf.

Understanding django serializers with examples

Serializers are used for “translating” Django models into other formats like xmi,json,yaml(YAML Ain’t a Markup Language)

from django.core import serializers
data = serializers.serialize("xml", SomeModel.objects.all())

Introduction to Django's Class based views - Understanding how a class based view works

Django has MVT architecture. A view in django is just a callable that takes a request and returns a response. But this can be more than just a function, that contains the actual business logic of an URL. In addition to normal funcation based views Django provides of some classes which can be used as views. These allow you to structure your views and reuse code by inheriting them.

Generating CSV, Excel files Using Python

In most of the cases, you need to export the data from your database to different formats. In this post I will show you how to create functions in your Django applications which export data as files. Here I will be covering the mostly used formats: CSV and Excel.

Django Hosting on Amazon EC2 with wordpress on same domain

Configuring the Wordpress as subdirectory can be tricky. In this tutorial we will Setup a Django Website alongside a wordpress blog.

Django permissions and Groups

Django comes with a simple permissions system. It provides a way to assign permissions to specific users and groups of users. We can have permissions for add, edit, deleting a model.

Django permissions are of 2 types:
1.Model level permissions
2.object level permissions

Celery With Supervisor

Celery is a task queue with focus on real-time processing, while also supports task scheduling. Task queues are used as mechanisms to distribute work across multiple threads or machines. A task queues input is a unit of work called a task,dedicated worker processes and constantly moniter the queue for new work to perform. Celery communicates via messages using a broker to mediate between workers and clients.

Inclusion Tags

Django’s template system comes with a wide variety of built-in tags and filters designed to address the presentation logic needs of your application. You can extend the template engine by defining custom tags and filters using Python, and then make them available to your templates using the {% load %} tag.

Custom template tags and filters must be inside a Django app. If they relate to an existing app it makes sense to create them there; otherwise, you should create a new app to hold them.

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