首先初始化model,建表
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class
Book(models.Model):
name
=
models.CharField(max_length
=
20
)
def
__str__(
self
):
return
self
.name
class
Meta:
db_table
=
'books'
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然后用pycharm的数据库模块可视化插入
分页思路
url传递参数http://127.0.0.1:8000/books/?page=5比如这样传递的参数就是5,就显示第五页,
1.get到所有图书对象
2.计算好每一页应该有几个数据
3.根据不同的page值传递
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def
books(request):
#取从url传递的参数
page_num
=
request.GET.get(
'page'
)
page_num
=
int
(page_num)
start
=
(page_num
-
1
)
*
5
end
=
page_num
*
5
#总页码数是?
per_page
=
5
total
=
models.Book.objects.
all
().count()
total,more
=
divmod
(total,per_page)
if
more:
total
+
=
1
all_books
=
models.Book.objects.
all
()[start:end]
#自己拼接分页的html代码
html_str_list
=
[]
for
i
in
range
(
1
,total):
tmp
=
'<li><a href="/books/?page={}" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" >{}</li>'
.
format
(i,i)
html_str_list.append(tmp)
page_html
=
"".join(html_str_list)
return
render(request,
'books.html'
,{
'books'
:all_books,
'total_page'
:total,
'page_html'
:page_html})
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拿到数据总量的值,每一页的数量为5,如果有余数则total+1也就是增加一个页面.
建立一个列表,去拼接a标签,最后传递给前端
前端
前端的样式用到了boottrap,可以直接看文档.
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<!DOCTYPE html>
<
html
lang
=
"en"
>
<
head
>
<
meta
charset
=
"UTF-8"
>
<
title
>书记列表</
title
>
<
link
rel
=
"stylesheet"
href
=
"/static/bootstrap/css/bootstrap.css"
rel
=
"external nofollow"
>
</
head
>
<
body
>
<
div
class
=
"container"
>
<
table
class
=
"table table-bordered"
>
<
thead
>
<
tr
>
<
th
>序号</
th
>
<
th
>id</
th
>
<
th
>书名</
th
>
</
tr
>
</
thead
>
<
tbody
>
{% for book in books %}
<
tr
>
<
td
>{{ forloop.counter }}</
td
>
<
td
>{{ book.id }}</
td
>
<
td
>{{ book.name }}</
td
>
</
tr
>
{% endfor %}
</
tbody
>
</
table
>
<
nav
aria-label
=
"Page navigation"
>
<
ul
class
=
"pagination"
>
<
li
>
<
a
href
=
"#"
rel
=
"external nofollow"
rel
=
"external nofollow"
aria-label
=
"Previous"
>
<
span
aria-hidden
=
"true"
>«</
span
>
</
a
>
</
li
>
{{ page_html|safe }}
<
li
>
<
a
href
=
"#"
rel
=
"external nofollow"
rel
=
"external nofollow"
aria-label
=
"Next"
>
<
span
aria-hidden
=
"true"
>»</
span
>
</
a
>
</
li
>
</
ul
>
</
nav
>
</
div
>
</
body
>
</
html
>
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{{ page_html|safe }}
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传递过来的page_html要用safe过滤器,不然无法转移成html.
最终效果
分页优化
设置一个首页一个尾页,以及显示局部的页面
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def
books(request):
# 取从url传递的参数
page_num
=
request.GET.get(
'page'
)
page_num
=
int
(page_num)
start
=
(page_num
-
1
)
*
5
end
=
page_num
*
5
# 总页码数是?
per_page
=
5
# 页面上总共展示多少页面
max_page
=
11
half_max_page
=
max_page
/
/
2
# 页面上展示的页面从哪开始
page_start
=
page_num
-
half_max_page
if
page_start <
=
1
:
page_start
=
1
total
=
models.Book.objects.
all
().count()
# 页面到哪结束
page_end
=
page_num
+
half_max_page
if
page_end > total:
page_end
=
total
page_start
=
total
-
max_page
total, more
=
divmod
(total, per_page)
if
more:
total
+
=
1
all_books
=
models.Book.objects.
all
()[start:end]
# 自己拼接分页的html代码
html_str_list
=
[]
html_str_list.append(
'<li><a href="/books/?page={}" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" >首页</li>'
.
format
(
1
,
1
))
for
i
in
range
(page_start, page_end
+
1
):
tmp
=
'<li><a href="/books/?page={}" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" >{}</li>'
.
format
(i, i)
html_str_list.append(tmp)
html_str_list.append(
'<li><a href="/books/?page={}" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" >最后一页</li>'
.
format
(total))
page_html
=
"".join(html_str_list)
return
render(request,
'books.html'
, {
'books'
: all_books,
'total_page'
: total,
'page_html'
: page_html})
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