RQL search bar
Starting from CubicWeb version 4.0 all code related to generating html views has been moved to the Cube cubicweb_web.
If you want to migrate a project from 3.38 to 4.* while still using all the
html views you need to both install the cubicweb_web cube AND add it to
your dependencies and run
cubicweb_web can be installed from pypi this way:
pip install cubicweb_web
In the long run cubicweb_api will be merged inside of CubicWeb.
RQL search bar#
The RQL search bar is a visual component, hidden by default, the tiny search input being enough for common use cases.
An autocompletion helper is provided to help you type valid queries, both in terms of syntax and in terms of schema validity.
How search is performed#
You can use the rql search bar to either type RQL queries, plain text queries or standard shortcuts such as <EntityType> or <EntityType> <attrname> <value>.
Ultimately, all queries are translated to rql since it’s the only
language understood on the server (data) side. To transform the user
query into RQL, CubicWeb uses the so-called magicsearch component,
cubicweb.web.views.magicsearch, which in turn
delegates to a number of query preprocessor that are responsible of
interpreting the user query and generating corresponding RQL.
The code of the main processor loop is easy to understand:
for proc in self.processors: try: return proc.process_query(uquery, req) except (RQLSyntaxError, BadRQLQuery): pass
The idea is simple: for each query processor, try to translate the query. If it fails, try with the next processor, if it succeeds, we’re done and the RQL query will be executed.