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pyramid_georest, extension for pyramid web frame work to provide rest interface for sql-alchemy mappers

Project description

Pyramid REST interface

This little package gives shortcuts to create a restful api to database sources. It provides a url pattern to serve the
It is meant to be used in a pyramid web framework eco system. It uses pyramid and sqlalchemy logic as well. Its goal is
to extend the database usage in pyramid frameworks. This way, it will be possible to serve data sources from
different databases from a single pyramid application.
I used a simple class system to make this api as adaptable as possible.

Main features:

* read (json, geojson, xml) + filtering via json parameters - also for geographic attributes
* read one / show (json, geojson, xml)
* create one
* update one
* delete one
* data model description (json, geojson, xml) => This provides a description to implement client side forms bound to the underlying data.

Special thing of this api: It can serve geometric extension objects too (It's only limited by geoalchemy2).

* pyramid (tested with 1.7.3)
* SQLAlchemy (tested with 1.0.15)
* GeoAlchemy2 (tested with 0.3.0)
* Shapely (tested with 1.5.17)
* dicttoxml (tested with 1.7.4)
* simplejson (tested with 3.8.2)

Usage in a standard pyramid web app

The pyramid framework for web apps provides an easy way for including
standalone packages in its eco system. To learn
more about that, please refer to the [extending guide]( 'extending guide').

In a nutshell (inside the of your pyramids project in the
main method ):

Configure the services which you want to be served via this api. Look
at the following example to see how:

from import Api, Service
from application.model import TestModel
def main(global_config, **settings):
""" This function returns a Pyramid WSGI application."""
config = Configurator(settings=settings)
config.include('pyramid_georest', route_prefix='api')
test_api = Api(
test_service = Service(TestModel)
return config.make_wsgi_app()

Calling the config.include method with the package name will do some
initializing stuff (Note that the optional
parameter 'route_prefix' can be used to set the restful interface below
a fix name space. This may be helpful especially
in big applications).

Main concept

The main goal of this library is to reduce the consumption of memory ,
url spaces and cpu usage. In big applications with a lot of services
this is a real big problem. In this context we have some central points
to take care of.

1. number of database connections
2. number of defined dedicated urls
3. adaptability of the several parts which a API consist of

Therefor this api ships with a mechanism which takes care of reusing
database connections as long as their definition is exactly the same
(we use the connections string for this as a key).
To reduce the number of constructed urls on server startup we create
only one set of restful urls per api. So every service added to an api
will fit in this set and will be identified by a match pattern.

Often you have some bigger applications and it is necessary to do some
more dedicated and more structured organization of api's.
Especially if you are using the possibility of pyramid plugins which
you include in the pyramid way ([pyramid include]( 'pyramid include')).
This kind of api object creates its own url scope and will respect the
route_prefix of the including application. This is much more flexible
in big applications which have different scopes to use the rest api.
Of cause it is possible to have several levels of includes. All
combined route_prefixes will be taken into account.

**One dedicated API for a specific plugin**

If you have some plugin which you like to include in your pyramid
application (cause this is the most generic way you can extend pyramid)
you probably like to have a restful api dedicated to this plugin in
matter of url spaces and naming. The code to achieve this might look
like the following:

In your main pyramid application:

def main(global_config, **settings):
""" This function returns a Pyramid WSGI application."""
config = Configurator(settings=settings)
config.include('my_plugin', route_prefix='my_plugin')
return config.make_wsgi_app()

In your plugins includeme mehtod:

from import Api, Service
from my_plugin.model import PluginModel
def includeme(config):
dedicated_api = Api(
dedicated_service = Service(PluginModel)

Please note also that the route prefix in the include method is not
mandatory but useful for the api created by this package.

Looking at the code above you will get an api which is running under
the prefix '/my_plugin/' and with the name 'api'.
So you will find each service bound to this api under /my_plugin/api/...

Pyramid REST Changelog

## 3.0.34

* fix bug on geojson point and multipoint formatting

## 3.0.33

* fix bug in filter iteration

## 3.0.32

* improve code styling
* add python 3 compatibility

## 3.0.31

* add a commit to the configuration of the api

## 3.0.30

* fix url name spacing bug

## 3.0.29

* remove trailing print

## 3.0.28

* fix api naming bug

## 3.0.27

* fix import bug

## 3.0.26

* add route prefix to api names, they are unique per pyramid plugin then

## 3.0.25

* implement an easier way to extend the parmas of the adapter proxy
which are sent to the template

## 3.0.24

* add not equals operator '!=' to filter

## 3.0.22

* remove default client side adapter, it is not useful to have it

## 3.0.21

* implement the possibility to add client side adapters via mako
* remove the central api solution to avoid confusion, there are only
stand alone api's from now

## 3.0.20

* set renderers under a more specific name space to avoid interferences
with other plugins

## 3.0.19

* fix problem where the geometry was not set as valid value in
update/create after flush

## 3.0.18

* deliver the persisted/deleted feature as response on update/create/delete

## 3.0.17

* implement correct export of geometry for polygons in geojson

## 3.0.16

* fix bug when rendering polygon types to geojson

## 3.0.15

* fix bug when creating multiple stand alone api's

## 3.0.14

* improve output for geojson format
* now it is possible to send data as geojson for create and update services

## 3.0.13

* handle NULL values for geometry

## 3.0.12

* set default value to None if it is a callable
* set srid automatically dependent on the model

## 3.0.11

* provide link between relationship and foreign key

## 3.0.10

* use srid from model definitions for write operations

## 3.0.9

* change urls with primary keys

## 3.0.8

* use a now

## 3.0.7

* bugfix the problem that bad requests weren't catched and iteration
over dict was not correctly implemented

## 3.0.6

* bugfix to make the http methods for stand alone api configurable too

## 3.0.5

* bugfix for add renderer problem, implement create, update, delete

## 3.0.4

* implement a flag which makes it possible to create global and
dedicated api's for more flexibility.

## 3.0.3

* fix bug

## 3.0.2

* fix the add_view problem when rest api is included in other

## 3.0.1

* fix the issue with geometric filtering
* make all geometric filter methods overwritable

## 3.0.0

* redesign complete behaviour (straight classes for more flexibility)
* redesign url creation
* complete independent api creation

## 2.0.4

Fixed issues:

* improve session handling
* use zope extension for sessions
* catch broad band errors to handle unknown behavior on db connections

## 2.0.3

Fixed issues:

* [#2]( Fixed problem where the relationship properties wasn't
loaded correctly .

## 2.0.2

Fixed issues:

* [#2]( Fixed lost m to n handling.

## 2.0.1

Fixed issues:

* [#1]( Fixed encoding issue in filter parameter.

## 2.0.0

First usable version of this package (propably not pip save).

This version ships with the basic parts of REST and some updates which mainly belong to the sqlalchemy
session handling and the filtering system.

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