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Python SQL query generation without the ORM.

Project description

Mason
====

.. image:: https://travis-ci.org/vail130/mason.svg?branch=master

Mason is a nice, light-weight, SQL query builder. It lets you use objects instead of SQL strings without
having an ORM take over your database model.

Example
-------
.. code-block:: python

# Annoying :/
query = """
SELECT purchases.id,
purchases.product_name,
(purchases.product_price)::NUMERIC(10, 2),
(purchases.datetime_purchased)::DATE
FROM purchases
INNER JOIN users ON purchases.purchaser_id = users.user_id
WHERE purchases.datetime_purchased BETWEEN %(start)s AND %(end)s
AND (purchases.purchaser_id = %(user_id)s OR purchases.purchaser_id IS NULL)
ORDER BY purchases.datetime_purchased ASC
LIMIT 10
OFFSET 10
"""

# Convenient :)
from mason import Table, Param, SELECT, AND, OR, DATE, NUMERIC

purchases = Table('purchases')
users = Table('users')
user_id = Param('user_id')
start = Param('start')
end = Param('end')

query = str(
SELECT(purchases.id, purchases.product_name,
NUMERIC(purchases.product_price, 10, 2),
DATE(purchases.datetime_purchased))
.FROM(purchases)
.INNER_JOIN(users.ON(purchases.purchaser_id == users.user_id))
.WHERE(AND(purchases.datetime_purchased.BETWEEN(start).AND(end),
OR(purchases.purchaser_id == user_id,
purchases.purchaser_id.IS_NULL)))
.ORDER_BY(purchases.datetime_purchased.ASC)
.LIMIT(10)
.OFFSET(10)
)

Install
-------
.. code-block:: sh

pip install mason

Develop
-------
.. code-block:: sh

cd path/to/repos
git clone git@github.com:vail130/mason.git
cd mason
mkvirtualenv mason
pip install -r requirements.txt
make test

Project details


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