SqlAlchemy support of ZomboDb

This extension provides support of ZomboDb query language for python sqlalchemy ORM

ZomboDb project: https://github.com/zombodb/zombodb

Examples

Phrase query:

from sa_zdb import zdb_query, ZdbPhrase

pg_session.query(Post.text)\
    .filter(zdb_query(Post.text == ZdbPhrase('hey joe')))


SELECT post.text AS post_text
FROM post
WHERE zdb('post', ctid) ==> 'text:"hey joe"'

Boolean query:

pg_session.query(Post.text)\
    .filter(zdb_query(or_(Post.text == 'foo', and_(Post.text == 'bar', Post.text == 'fuzz'))))

SELECT post.text AS post_text
FROM post
WHERE zdb('post', ctid) ==> '(text:foo or (text:bar and text:fuzz))'

more_like_this:

pg_session.query(Post.text)\
    .filter(zdb_query(Post.text.match('foo')))

SELECT post.text AS post_text
FROM post
WHERE zdb('post', ctid) ==> 'text:@foo'

Comparison operations:

pg_session.query(Post.text)\
    .filter(zdb_query(Post.comments > 1))

SELECT post.text AS post_text
FROM post
WHERE zdb('post', ctid) ==> 'comments > 1'

Raw query:

pg_session.query(Post.text)\
    .filter(zdb_query(Post, 'text:(sports,box) or long_description:(wooden w/5 away) and comments < 10'))

SELECT post.text AS post_text
FROM post
WHERE zdb('post', ctid) ==> 'text:(sports,box) or long_description:(wooden w/5 away) and comments < 10'

Also, regexp supports through like operation