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https://gitlab2.federez.net/re2o/re2o
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64 lines
2.4 KiB
Python
64 lines
2.4 KiB
Python
# -*- mode: python; coding: utf-8 -*-
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# Re2o est un logiciel d'administration développé initiallement au Rézo Metz. Il
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# se veut agnostique au réseau considéré, de manière à être installable en
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# quelques clics.
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#
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# Copyright © 2018 Maël Kervella
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#
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# This program is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation; either version 2 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License along
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# with this program; if not, write to the Free Software Foundation, Inc.,
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# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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"""Defines the pagination classes used in the API to paginate the results.
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"""
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from rest_framework import pagination
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class PageSizedPagination(pagination.PageNumberPagination):
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"""Provide the possibility to control the page size by using the
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'page_size' parameter. The value 'all' can be used for this parameter
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to retrieve all the results in a single page.
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Attributes:
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page_size_query_param: The string to look for in the parameters of
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a query to get the page_size requested.
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all_pages_strings: A set of strings that can be used in the query to
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request all results in a single page.
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max_page_size: The maximum number of results a page can output no
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matter what is requested.
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"""
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page_size_query_param = "page_size"
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all_pages_strings = ("all",)
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max_page_size = 10000
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def get_page_size(self, request):
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"""Retrieve the size of the page according to the parameters of the
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request.
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Args:
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request: the request of the user
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Returns:
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A integer between 0 and `max_page_size` that represent the size
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of the page to use.
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"""
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try:
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page_size_str = request.query_params[self.page_size_query_param]
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if page_size_str in self.all_pages_strings:
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return self.max_page_size
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except KeyError:
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pass
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return super(PageSizedPagination, self).get_page_size(request)
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