SearchBackend API

class SearchBackend(site=None)

The SearchBackend class handles interaction directly with the backend. The search query it performs is usually fed to it from a SearchQuery class that has been built for that backend.

This class must be at least partially implemented on a per-backend basis and is usually accompanied by a SearchQuery class within the same module.

Unless you are writing a new backend, it is unlikely you need to directly access this class.

Method Reference

update

SearchBackend.update(self, index, iterable)

Updates the backend when given a SearchIndex and a collection of documents.

This method MUST be implemented by each backend, as it will be highly specific to each one.

remove

SearchBackend.remove(self, obj_or_string)

Removes a document/object from the backend. Can be either a model instance or the identifier (i.e. app_name.model_name.id) in the event the object no longer exists.

This method MUST be implemented by each backend, as it will be highly specific to each one.

clear

SearchBackend.clear(self, models=[])

Clears the backend of all documents/objects for a collection of models.

This method MUST be implemented by each backend, as it will be highly specific to each one.

prep_value

SearchBackend.prep_value(self, value)

Hook to give the backend a chance to prep an attribute value before sending it to the search engine.

By default, just force it to unicode.

more_like_this

SearchBackend.more_like_this(self, model_instance)

Takes a model object and returns results the backend thinks are similar.

This method MUST be implemented by each backend, as it will be highly specific to each one.

build_schema

SearchBackend.build_schema(self, fields)

Takes a dictionary of fields and returns schema information.

This method MUST be implemented by each backend, as it will be highly specific to each one.

build_registered_models_list

SearchBackend.build_registered_models_list(self)

Builds a list of registered models for searching.

The search method should use this and the django_ct field to narrow the results (unless the user indicates not to). This helps ignore any results that are not currently registered models and ensures consistent caching.

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