Simple Web-site with tree pages¶
This is an example of using pyramid_pages in just one file (pyramid_pages_example.py). Full code you can see there.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 | #! /usr/bin/env python
# -*- coding: utf-8 -*-
# vim:fenc=utf-8
#
# Copyright © 2014 uralbash <root@uralbash.ru>
#
# Distributed under terms of the MIT license.
"""
Main for example
"""
import os
import json
import transaction
from sqlalchemy import (
Date,
Text,
Column,
String,
Integer,
ForeignKey,
engine_from_config
)
from pyramid.config import Configurator
from pyramid.events import BeforeRender
from sqlalchemy.orm import relationship, sessionmaker, scoped_session
from sqlalchemy.sql import func
from pyramid.session import SignedCookieSessionFactory
from sqlalchemy_mptt import mptt_sessionmaker
from zope.sqlalchemy import ZopeTransactionExtension
from sqlalchemy.ext.declarative import declarative_base
from pyramid_pages.models import FlatPageMixin, MpttPageMixin, RedirectMixin
from pyramid_pages.resources import (
BasePageResource,
resource_of_node,
resources_of_config
)
Base = declarative_base()
DBSession = scoped_session(
mptt_sessionmaker(
sessionmaker(extension=ZopeTransactionExtension())
)
)
CONFIG_SQLALCHEMY_URL = 'sqlalchemy.url'
CONFIG_PYRAMID_PAGES_MODELS = 'pyramid_pages.models'
CONFIG_PYRAMID_PAGES_DBSESSION = 'pyramid_pages.dbsession'
class BasePage(Base, RedirectMixin):
__tablename__ = 'base_pages'
id = Column(Integer, primary_key=True)
page_type = Column(String(50))
__mapper_args__ = {
'polymorphic_identity': 'base_page',
'polymorphic_on': page_type,
'with_polymorphic': '*'
}
@classmethod
def get_pk_name(cls):
return 'id'
@classmethod
def get_pk_with_class_name(cls):
return 'BasePage.id'
class WebPage(BasePage, MpttPageMixin):
__tablename__ = 'mptt_pages'
id = Column(Integer, ForeignKey('base_pages.id'), primary_key=True)
__mapper_args__ = {
'polymorphic_identity': 'web_page',
}
class NewsPage(BasePage, FlatPageMixin):
__tablename__ = 'flat_news'
id = Column(Integer, ForeignKey('base_pages.id'), primary_key=True)
date = Column(Date, default=func.now())
__mapper_args__ = {
'polymorphic_identity': 'news_page',
}
class Gallery(BasePage, MpttPageMixin):
__tablename__ = 'mptt_gallery'
id = Column(Integer, ForeignKey('base_pages.id'), primary_key=True)
__mapper_args__ = {
'polymorphic_identity': 'gallery_page',
}
class Photo(Base):
__tablename__ = 'photos'
id = Column('id', Integer, primary_key=True)
path = Column('path', Text)
gallery_id = Column(Integer, ForeignKey('mptt_gallery.id'))
gallery = relationship('Gallery', backref='photos')
class GalleryResource(BasePageResource):
model = Gallery
template = 'gallery/index.jinja2'
class NewsResource(BasePageResource):
model = NewsPage
template = 'news/index.jinja2'
class Fixtures(object):
def __init__(self, session):
self.session = session
def add(self, model, fixtures):
here = os.path.dirname(os.path.realpath(__file__))
file = open(os.path.join(here, fixtures))
fixtures = json.loads(file.read(), encoding='utf-8')
for fixture in fixtures:
self.session.add(model(**fixture))
self.session.flush()
transaction.commit()
models = {
'': WebPage,
'pages': WebPage,
'news': NewsResource,
'gallery': GalleryResource,
}
def add_globals(event):
class Menu(object):
resources = resources_of_config(models)
def __init__(self, model):
self.nodes = DBSession.query(model)
self.template = 'pyramid_pages/menu/flat.jinja2'
if hasattr(model, 'parent'):
self.nodes = self.nodes.filter_by(parent=None)\
.order_by(model.tree_id)
self.template = 'pyramid_pages/menu/mptt.jinja2'
def __iter__(self):
for node in self.nodes:
yield resource_of_node(self.resources, node)(node)
event['pages_menu'] = Menu(WebPage)
event['news_menu'] = Menu(NewsPage)
event['gallery_menu'] = Menu(Gallery)
def main(global_settings, **settings):
config = Configurator(
settings=settings,
session_factory=SignedCookieSessionFactory('itsaseekreet')
)
config.include('pyramid_jinja2')
config.add_jinja2_search_path('pyramid_pages_example:templates')
config.add_static_view('pyramid_pages_example_static',
'static')
# Database
settings = config.get_settings()
settings[CONFIG_SQLALCHEMY_URL] =\
settings.get(CONFIG_SQLALCHEMY_URL,
'sqlite:///example.sqlite')
engine = engine_from_config(settings)
DBSession.configure(bind=engine)
Base.metadata.drop_all(engine)
Base.metadata.create_all(engine)
fixture = Fixtures(DBSession)
fixture.add(WebPage, 'fixtures/pages.json')
fixture.add(WebPage, 'fixtures/country.json')
fixture.add(NewsPage, 'fixtures/news.json')
fixture.add(Gallery, 'fixtures/gallery.json')
fixture.add(Photo, 'fixtures/photos.json')
# pyramid_pages
settings[CONFIG_PYRAMID_PAGES_DBSESSION] =\
settings.get(CONFIG_PYRAMID_PAGES_DBSESSION,
DBSession)
settings[CONFIG_PYRAMID_PAGES_MODELS] =\
settings.get(CONFIG_PYRAMID_PAGES_MODELS, models)
config.include("pyramid_pages")
config.add_subscriber(add_globals, BeforeRender)
return config.make_wsgi_app()
if __name__ == '__main__':
settings = {}
app = main({}, **settings)
from wsgiref.simple_server import make_server
httpd = make_server('0.0.0.0', 6543, app)
httpd.serve_forever()
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