https://github.com/maprihoda/simple_pagination

Simple pagination for Google App Engine (GAE) Python
https://github.com/maprihoda/simple_pagination

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Simple pagination for Google App Engine (GAE) Python

• Host: GitHub
• URL: https://github.com/maprihoda/simple_pagination
• Owner: maprihoda
• Created: 2011-09-18T16:32:17.000Z (over 13 years ago)
• Default Branch: master
• Last Pushed: 2012-03-16T11:43:20.000Z (almost 13 years ago)
• Last Synced: 2024-12-31T17:06:14.768Z (25 days ago)
• Language: Python
• Homepage:
• Size: 93.8 KB
• Stars: 2
• Watchers: 2
• Forks: 1
• Open Issues: 0
• Metadata Files:
  • Readme: README.md

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README

        
# Simple Pagination

A utility class, a pager method and a jinja2 macro for paging query results and generating page links. Can be used with Google App Engine (GAE).

The utility class is the PageLinks class found in the page_links.py file. The class's initialization method accepts the following parameters:

    page:           The current page

    total_items:    The total number of items

    per_page:       The number of items per page

    url_root:       The start of the URL assigned to each page.

    page_field:     The name of the URL parameter to use for pages

    page_range:     The number of pages to show (should be odd)

## Example Usage (GAE specific)

Simply copy the page_links.py file into your GAE project root.

In your project's base handler (base controller) class, create a pager method:

    form page_links import PageLinks

    class BaseHandler(webapp.RequestHandler):

        # ...other code...

        def pager(self, query, page, total_items, per_page, url_root, page_field='pg', page_range= 9):

            try:

                page = int(page)

            except ValueError:

                page = 1

            entities = query.fetch(per_page, (page - 1) * per_page)

            pagination_links = PageLinks(

                page,

                total_items,

                per_page,

                url_root,

                page_field,

                page_range

            )

            pagination_links = pagination_links.get_links()

            return entities, pagination_links

Then, in your handlers, you can use the pager method as follows:

    class Recruiters(BaseHandler):

        per_page = 20

        def get(self):

            # ...other code...

            page = self.request.get('pg')

            query = company.recruiters

            recruiters, pagination_links = self.pager(

                query,

                page,

                query.count(),

                self.per_page,

                '/a/recruiters',

            )

You can also use the following Jinja2 macro in your templates:

    {% macro pagelinks(pagination_links) %}

    


    {% for link in pagination_links %}

       {{ link }}

    {% endfor %}

    

    {% endmacro %}


You can see Simple Pagination in action on [Aktuální nabídky práce](http://www.aktualninabidkyprace.cz/). It's a simple job board built on [Google App Engine](http://code.google.com/appengine/).

## Credits

The PageLinks class is an adapted version of a utility class from the he3-appengine-lib project (http://code.google.com/p/he3-appengine-lib/wiki/PageLinks)