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 the file contents.

Here we are overriding NewsIndex prepare method to include the extracted content along with information retrieved from the database:

class NewsIndex(indexes.SearchIndex, indexes.Indexable):
    text = CharField(document=True, use_template=True, analyzer='synonym_analyzer')
    content = indexes.CharField(model_attr='content')

def prepare(self, obj):
        data = super(NewsIndex, self).prepare(obj)
        file_data = self._get_backend(None).extract_file_contents(obj.new_file)
        template = loader.select_template(
            ("search/indexes/proj/new_text.txt", ),
        )
        data["text"] = template.render(Context({
            "object": obj,
            "file_data": var,
        }))
        return data

This allows you to insert the extracted text at the appropriate place in your template, 

{{ file_data.contents|striptags|safe }}

To index the documents, we need to generate a schema.xml about our models

./manage.py build_solr_schema >schema.xml

In order to tell sorl about our models schema, just copy the schema.xml and put it in /etc/solr/conf

sudo cp /home/git-projs/elasticproject/schema.xml  /etc/solr/conf

and we can run solr using the following command in which folder you have downloaded 

java -jar start.jar
    By Posted On
SENIOR DEVELOPER at MICROPYRAMID

Need any Help in your Project?Let's Talk

Latest Comments
Related Articles
How to create Periodic Tasks in Celery? Nikhila Mergu

Celery provides asynchronous job queues, which allows you to run Python functions in the background. Celery is on the Python Package Index (PyPi), and can ...

Continue Reading...
How to Create initial django migrations for existing DB schema. Chaitanya Kattineni

Django provides the comfort database migrations from its version 1.8, with which we can avoid the usage of third party packages like south. Adding migrations ...

Continue Reading...
Setting Up Coveralls for Django Project Ravi Kumar Gadila

Coveraslls will check the code coverage for your test cases. To use coveralls.io your code must be hosted on GitHub or BitBucket.

install coveralls
...

Continue Reading...
open source packages

Subscribe To our news letter

Subscribe and Stay Updated about our Webinars, news and articles on Django, Python, Machine Learning, Amazon Web Services, DevOps, Salesforce, ReactJS, AngularJS, React Native.
* We don't provide your email contact details to any third parties