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tri.query is a library to define queries

Project description

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tri.query

tri.query makes it easy to implement searching and filtering in your Django app.

Major features:

  • Generate simple filtering GUIs easily while at the same time:
  • Supply your views with advanced query languages
  • Query language can be used stand alone without the GUI parts
  • Highly customizable GUI based on tri.form

Example

Simple view that allows the user to search for a car by choosing the make from a drop down, and search for specific model in the advanced mode:

class CarQuery(Query):
    make = Variable.choice(
        choices=['Toyota', 'Volvo', 'Ford'],
        form_field__show=True)  # Display this field in the simple style GUI
    model = Variable.text()

def cars(request):
    query = CarQuery()
    cars_query_set = query.request_to_q(request)
    form = query.form()
    return render(
        template_name='cars.html',
        context_instance=RequestContext(request, {'query_form': form, 'cars': cars_query_set}))
<!-- cars.html -->
{% include "tri_query/form.html" with form=query_form %}

<ul>
    {% for car in cars %}
        <li>{{ car }}</li>
    {% endfor %}
</ul>
simple_gui.png

After switching to the advanced mode:

advanced_gui.png

Programmatically call the search API:

query = CarQuery()
cars_query_set = query.parse('make=Toyota and (make=1991 or make=1992)')

Running tests

You need tox installed then just make test.

License

BSD

Changelog

4.0.4 (2018-10-23)

  • Support searching for quotation mark

4.0.3 (2018-10-10)

  • A more helpful error message if you didn’t specify value_to_q_lookup but you need to.
  • Removed buggy use of setdefaults. This could cause overriding of nested arguments to not take.

4.0.2 (2018-10-04)

  • Added Variable.boolean_tristate for editing boolean fields with null value allowed

4.0.1 (2018-09-21)

  • Made Query a RefinableObject

4.0.0 (2017-08-22)

  • Moved to tri.declarative 0.34 and tri.form 5.0
  • Note that gui__class to specify a constructor/callable is no longer a valid parameter, because of updated tri.form. Use gui__call_target or just gui.
  • You no longer need to specify the model parameter to choice_queryset or multi_choice_queryset if you give it a QuerySet as choices (as opposed to giving a callable)

3.3.0 (2017-04-27)

  • Move default behaviors out from the shortcuts so they can be used externally
  • Removed jquery dependency for toggling simple/advanced filtering
  • Removed support for Django 1.7

3.2.0 (2017-03-22)

  • Variable class now inherits from object, making the implementation more pythonic. (Attributes still possible to override in constructor call, see NamespaceAwareObject)

3.1.0 (2016-09-19)

  • Moved to the simplified factory system for from_model
  • Added shortcuts to Variable: url, time, datetime, date, email, decimal

3.0.0 (2016-09-14)

  • Updated to latest major tri.form

2.2.0 (2016-08-16)

  • Variable.choice_queryset handles the string “null” the same way as everything else
  • Queries that have multi-select inputs now work

2.1.1 (2016-08-08)

  • Report invalid operators for choice queryset as errors instead of crashing

2.1.0 (2016-07-12)

  • Check for dates that are out of range

2.0.0 (2016-06-02)

  • Cache form on Query
  • Render global form errors
  • Query.form() no longer takes a request parameter, since it was redundant anyway. This is a potential breaking change.
  • Correctly dispatch attr to underlying tri.form
  • Support for ajax backend. New parameter to Query: endpoint_dispatch_prefix.

1.11.0 (2016-04-25)

  • Minor bugfix for variable-from-model handling of auto fields

1.10.0 (2016-04-21)

  • Fix over-eager assert not allowing variable-less Query objects.

1.9.0 (2016-04-21)

  • Enable mixing variable definitions in both declared variables and class meta.
  • Added after attribute on Variable to enable custom variable ordering (See tri.declarative.sort_after())
  • Added Variable.from_model, Query.from_model

1.8.0 (2016-04-19)

  • Added robustness in when arguments are passed as dict(foo=dict(bar=17)) or foo__bar=17

1.7.0 (2016-04-08)

  • Add python 3 support

1.6.0 (2016-03-03)

  • Variable.float shortcut added
  • Add support for Django 1.7 and 1.8.

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