A simple query builder for Amazon Cloudsearch Structured query parser.

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.. contents:: :local: :depth: 1

Features

• Provide a simple query builder for Amazon Cloudsearch Structured query parser.

• Please refer to the following link regarding Structured Search Syntax .

  • http://docs.aws.amazon.com/cloudsearch/latest/developerguide/search-api.html

Caution

• At the moment, this library is compatible only to Structured Search Syntax .

• It does not have any plans corresponding to the other query parser(lucene, dismax, simple).

• If you want the lucene query builder, it's a good idea is to use the following library.

  • https://pypi.python.org/pypi/lucene-querybuilder

• This library does not handle to generate queries that are not related to Structured Search Syntax. Ex) size, facets ...

Set up

Make environment with pip::

$ pip install csquery

Usage

and

Syntax: (and boost=N EXPRESSION EXPRESSION ... EXPRESSIONn)

.. code-block:: python

from csquery.structured import and_, field

q = and_(title='star', actors='Harrison Ford', year=('', 2000)) q() #=> (and title:'star' actors:'Harrison Ford' year:{,2000])

with option

q = and_({'title': 'star'}, {'title': 'star2'}, boost=2) q() #=> (and boost=2 title:'star' title:'star2')

another writing

and_({'title': 'star'}, {'actors': 'Harrison Ford'}, {'year': ('', 2000)}) and_(field('star', 'title'), field('Harrison Ford', 'actors'), field(('', 2000), 'year'))

or

Syntax: (or boost=N EXPRESSION1 EXPRESSION2 ... EXPRESSIONn)

.. code-block:: python

from csquery.structured import or_, field

q = or_(title='star', actors='Harrison Ford', year=('', 2000)) q() #=> (or title:'star' actors:'Harrison Ford' year:{,2000])

with option

q = or_({'title': 'star'}, {'title': 'star2'}, boost=2) q() #=> (or boost=2 title:'star' title:'star2')

not

Syntax: (not boost=N EXPRESSION)

.. code-block:: python

from csquery.structured import not_, and_

q = not_(and_(actors='Harrison Ford', year=('', 2010))) q() #=> (not (and actors:'Harrison Ford' year:{,2010]))

with option

q = not_(and_(actors='Harrison Ford', year=('', 2010)), boost=2) q() #=> (not boost=2 (and actors:'Harrison Ford' year:{,2010]))

near

Syntax: (near field=FIELD distance=N boost=N 'STRING')

.. code-block:: python

from csquery.structured import near

q = near('teenage vampire', boost=2, field='plot', distance=2) q() #=> (near field=plot distance=2 boost=2 'teenage vampire')

phrase

Syntax: (phrase field=FIELD boost=N 'STRING')

.. code-block:: python

from csquery.structured import phrase

q = phrase('star', boost=2, field='title') q() #=> (phrase field=title boost=2 'star')

prefix

Syntax: (prefix field=FIELD boost=N 'STRING')

.. code-block:: python

from csquery.structured import prefix

q = prefix('star', boost=2, field='title') q() #=> (prefix field=title boost=2 'star')

range

Syntax: (range field=FIELD boost=N RANGE)

.. code-block:: python

from csquery.structured import range_

q = range_((1990, 2000)) q() #=> (range [1990,2000]) q = range_((None, 2000)) q() #=> (range {,2000]) q = range_((1990,)) q() #=> (range [1990,})

with opition

q = range_((1990, 2000), field='date', boost=2) q() #=> (range field=date boost=2 [1990,2000])

another writing

q = range_('[1990,2000]') q() #=> (range [1990,2000])

q = range_(('', 2000)) q() #=> (range {,2000]) q = range_('{,2000]') q() #=> (range {,2000])

q = range_((1990, None)) q() #=> (range [1990,}) q = range_((1990, '')) q() #=> (range [1990,}) q = range_('[1990,}') q() #=> (range [1990,})

term

Syntax: (term field=FIELD boost=N 'STRING'|VALUE)

.. code-block:: python

from csquery.structured import term

q = term(2000, field='year', boost=2) q() #=> (term field=year boost=2 2000)

q = term('star', field='title', boost=2) q() #=> (term field=title boost=2 'star')

Complex query sample

.. code-block:: python

from csquery.structured import and_, or_, not_, term

q = and_( not_('test', field='genres'), or_( term('star', field='title', boost=2), term('star', field='plot') ) ) q() #=> (and (not field=genres 'test') (or (term field=title boost=2 'star') (term field=plot 'star')))

Using with boto

http://boto.readthedocs.org/en/latest/ref/cloudsearch2.html

.. code-block:: python

from csquery.structured import and_ from boto.cloudsearch2.layer2 import Layer2

conn = Layer2( region='ap-northeast-1', aws_access_key_id=[AWS ACCESSS KEY ID], aws_secret_access_key=[AWS SECRET KEY], ) domain = conn.lookup('search_domain_name') search_service = domain.get_search_service()

q = and_(title='star', actors='Harrison Ford', year=('', 2000)) result = search_service.search(q=q(), parser='structured')

Python Support

• Python 2.7, 3,3, 3.4 or later.

License

• Source code of this library Licensed under the MIT License.

See the LICENSE.rst file for specific terms.

Authors

• tell-k <ffk2005 at gmail.com>

Contributors

Thanks.

• @podhmo
• @furi

History

0.1.4(Nov 25, 2015)

• Fixed unquoted field value. #4 <https://github.com/tell-k/csquery/pull/4>_.

0.1.3(Nov 20, 2015)

• Fixed over escaped expression. #3 <https://github.com/tell-k/csquery/pull/3>_.

0.1.2(Nov 18, 2015)

• Fixed escape bug. #2 <https://github.com/tell-k/csquery/pull/2>_.

0.1.1(Nov 6, 2015)

• Fixed bug. #1 <https://github.com/tell-k/csquery/pull/1>_.

0.1.0(Jun 8, 2015)

• First release

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