imacat/mia-accounting-django
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Replaced the CashReportView list view with the cash view function, to simplify. Moved the pagination query parameter parser from the view to Pagination.

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This commit is contained in:
依瑪貓
2020-07-11 17:23:38 +08:00
parent 2f53bcfd43
commit fa7416d0f3
3 changed files with 110 additions and 158 deletions
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111
mia_core/utils.py
View File

@ -46,10 +46,10 @@ class UrlBuilder:
return
self.base_path = start_url[:pos]
self.params = []
for piece in start_url[pos+1:].split("&"):
for piece in start_url[pos + 1:].split("&"):
pos = piece.find("=")
name = urllib.parse.unquote(piece[:pos])
value = urllib.parse.unquote(piece[pos+1:])
value = urllib.parse.unquote(piece[pos + 1:])
self.params.append(self.Param(name, value))
def add_param(self, name, value):
@ -143,14 +143,11 @@ class UrlBuilder:
urllib.parse.quote(self.value))
DEFAULT_PAGE_SIZE = 10
class Pagination:
"""The pagination.
Args:
current_url (str): The current URL
request (HttpRequest): The request
records (list[Model]): All the records
page_no (int): The specified page number
page_size (int): The specified number of records per page
@ -158,8 +155,7 @@ class Pagination:
page first
Raises:
PageNoOutOfRangeError: if the specified page number is out
of range or is redundant.
PaginationException: With invalid pagination parameters
Attributes:
is_reversed (bool): Whether we should display the last
@ -182,30 +178,57 @@ class Pagination:
page_no = None
records = None
def __init__(self, current_url, records, page_no,
page_size, is_reversed=False):
DEFAULT_PAGE_SIZE = 10
def __init__(self, request, records, is_reversed=False):
current_url = request.get_full_path()
self._current_url = current_url
self._base_url = UrlBuilder(current_url).del_param("page")
self.is_reversed = is_reversed
self.page_size = page_size \
if page_size is not None \
else DEFAULT_PAGE_SIZE
# The page size
try:
self.page_size = int(request.GET["page-size"])
if self.page_size == self.DEFAULT_PAGE_SIZE:
raise PaginationException(str(
UrlBuilder(current_url).del_param("page-size")))
if self.page_size < 1:
raise PaginationException(str(
UrlBuilder(current_url).del_param("page-size")))
except KeyError:
self.page_size = self.DEFAULT_PAGE_SIZE
except ValueError:
raise PaginationException(str(
UrlBuilder(current_url).del_param("page-size")))
self.total_pages = int(
(len(records) - 1) / self.page_size) + 1
default_page_no = 1 if not is_reversed else self.total_pages
self.is_paged = self.total_pages > 1
# The page number
try:
self.page_no = int(request.GET["page"])
if not self.is_paged:
raise PaginationException(str(
UrlBuilder(current_url).del_param("page")))
if self.page_no == default_page_no:
raise PaginationException(str(
UrlBuilder(current_url).del_param("page")))
if self.page_no < 1:
raise PaginationException(str(
UrlBuilder(current_url).del_param("page")))
if self.page_no > self.total_pages:
raise PaginationException(str(
UrlBuilder(current_url).del_param("page")))
except KeyError:
self.page_no = default_page_no
except ValueError:
raise PaginationException(str(
UrlBuilder(current_url).del_param("page")))
if not self.is_paged:
self.page_no = 1
self.records = records
self._links = []
return
default_page = 1 if not is_reversed else self.total_pages
if page_no == default_page:
raise PageNoOutOfRangeException()
self.page_no = page_no \
if page_no is not None \
else default_page
if self.page_no > self.total_pages:
raise PageNoOutOfRangeException()
start_no = self.page_size * (self.page_no - 1)
self.records = records[start_no:start_no + self.page_size]
@ -294,7 +317,7 @@ class Pagination:
link.url = str(base_url)
else:
link.url = str(base_url.clone().add_param(
"page", str(self.total_pages)))
"page", str(self.total_pages)))
else:
link.url = str(base_url.clone().add_param(
"page", str(self.page_no + 1)))
@ -321,9 +344,24 @@ class Pagination:
def page_size_options(self):
base_url = UrlBuilder(self._current_url).del_param(
"page").del_param("page-size")
return [self.PageSizeOption(x, _page_size_url(base_url, x))
return [self.PageSizeOption(x, self._page_size_url(base_url, x))
for x in [10, 100, 200]]
@staticmethod
def _page_size_url(base_url, size):
"""Returns the URL for a new page size.
Args:
base_url (UrlBuilder): The base URL builder.
size (int): The new page size.
Returns:
str: The URL for the new page size.
"""
if size == Pagination.DEFAULT_PAGE_SIZE:
return str(base_url)
return str(base_url.clone().add_param("page-size", str(size)))
class PageSizeOption:
"""A page size option.
@ -343,23 +381,16 @@ class Pagination:
self.url = url
def _page_size_url(base_url, size):
"""Returns the URL for a new page size.
class PaginationException(Exception):
"""The exception thrown with invalid pagination parameters.
Args:
base_url (UrlBuilder): The base URL builder.
size (int): The new page size.
url (str): The canonical URL to redirect to.
Returns:
str: The URL for the new page size.
Attributes:
url (str): The canonical URL to redirect to.
"""
if size == DEFAULT_PAGE_SIZE:
return str(base_url)
return str(base_url.clone().add_param("page-size", str(size)))
url = None
class PageNoOutOfRangeException(Exception):
"""The error thrown when the specified page number is out of
range.
"""
pass
def __init__(self, url):
self.url = url