分页器
分页器对象
from django.core.paginator import Paginator
Paginator对象： paginator = Paginator(user_list, 10)
per_page: 每页显示条目数量
count: 数据总个数
num_pages:总页数
page_range:总页数的索引范围，如: (1,10),(1,200)
page: page对象
page对象
page对象：page=paginator.page(页码) 生成page对象，传页码，会生成对应页码数据
has_next 是否有下一页
next_page_number 下一页页码
has_previous 是否有上一页
previous_page_number 上一页页码
object_list 分页之后的数据列表
number 当前页
paginator paginator对象
views中
def page_text(request):
book_list = Books.objects.all()
paginator = Paginator(book_list, 5)
try:
current_page = int(request.GET.get('page', 1))
page = paginator.page(current_page)
except Exception:
current_page = 1
page = paginator.page(current_page)
if paginator.num_pages < 12:
page_list = paginator.page_range
else:
if current_page < 6:
page_list = range(1, 12)
elif current_page > paginator.num_pages - 5:
page_list = range(paginator.num_pages - 10, paginator.num_pages + 1)
else:
page_list = range(current_page - 5, current_page + 6)
return render(request, 'page_text.html',locals())
html中
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<link rel="stylesheet" href="/static/bootstrap-3.3.7-dist/css/bootstrap.min.css">
<link rel="stylesheet" href="/static/css/page_text.css">
<title>page_text</title>
</head>
<body>
<div class="container">
<ul class="page_info">
{% for book in page %}
<li><span>书名：{{ book.name }}</span> <span>信息：{{ book.info }}</span></li>
{% endfor %}
</ul>
<nav aria-label="Page navigation">
<ul class="pagination">
<li>
{% if page.has_previous %}
<a href="?page={{ page.previous_page_number }}" aria-label="Previous">
<span aria-hidden="true">上一页</span>
{% else %}
<span aria-hidden="true">上一页</span>
{% endif %}
</a>
</li>
{% for page in page_list %}
{% if current_page == page %}
<li class="active"><a href="/page_text/?page={{ page }}">{{ page }}</a></li>
{% else %}
<li><a href="/page_text/?page={{ page }}">{{ page }}</a></li>
{% endif %}
{% endfor %}
<li>
{% if page.has_next %}
<a href="?page={{ page.next_page_number }}" aria-label="Previous"></a>
<span aria-hidden="true">下一页</span>
{% else %}
<span aria-hidden="true">下一页</span>
{% endif %}
</li>
</ul>
</nav>
</div>
</body>
</html>
form组件
模板层
class UserInfo(models.Model):
name=models.CharField(max_length=32)
pwd=models.CharField(max_length=32)
email=models.EmailField(
views层
from django import forms
from django.forms import widgets
from django.core.exceptions import ValidationError
class RegForm(forms.Form):
name = forms.CharField(required=True, max_length=10, min_length=1, label='用户名', error_messages=
{'required': '该字段必填', 'max_length': '太长了', 'min_length': '太短了'},
widget=widgets.TextInput(attrs={'class': 'form-control error'}))
pwd = forms.CharField(required=True, max_length=10, min_length=1, label='密码', error_messages=
{'required': '该字段必填', 'max_length': '太长了', 'min_length': '太短了'},
widget=widgets.PasswordInput(attrs={'class': 'form-control error'}))
re_pwd = forms.CharField(required=True, max_length=10, min_length=1, label='确认密码', error_messages=
{'required': '该字段必填', 'max_length': '太长了', 'min_length': '太短了'},
widget=widgets.PasswordInput(attrs={'class': 'form-control error'}))
email = forms.EmailField(required=True, label='邮箱', error_messages=
{'required': '该字段必填', 'invalid': '不符合邮箱格式'},
widget=widgets.PasswordInput(attrs={'class': 'form-control error'}))
def clean_name(self): # 局部钩子（多了一个我自己写校验规则的方式)
name = self.cleaned_data.get('name')
user = UserInfo.objects.filter(name=name).first()
if user:
raise ValidationError('用户已经存在')
else:
if name.startswith('sb'):
raise ValidationError('不能以sb开头')
return name
def clean(self): # 全局钩子
pwd = self.cleaned_data.get('pwd')
re_pwd = self.cleaned_data.get('re_pwd')
if pwd and re_pwd:
if pwd == re_pwd:
return self.cleaned_data
else:
raise ValidationError('两次密码不一致')
def form_test(request):
form_obj = RegForm()
# from类里没有的字段，不会做校验，而且，一旦校验通过，cleaned_data 里面也没有这个字段
if request.method == 'POST':
form_obj = RegForm(request.POST)
if form_obj.is_valid(): # is_valid 返回一个布尔类型，true代表，里面所有字段，都校验通过
UserInfo.objects.create(**form_obj.cleaned_data) # cleaned_data 校验通过的字段，放在里面
# return HttpResponse('ok')
else:
print(form_obj.errors.as_data())
errors = form_obj.errors.get('__all__', '')
# print(form_obj['name'].errors)
# return HttpResponse('失败')
return render(request, 'forms_test.html', locals())
html中
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<link rel="stylesheet" href="/static/bootstrap-3.3.7-dist/css/bootstrap.min.css">
<title>Title</title>
</head>
<body>
<div class="container-fluid">
<div class="row">
<div class="col-md-6 col-md-offset-3">
<form action="" method="post">
<p>用户名：<input type="text" name="name" class="form-control" aa="ddd"></p>
<p>密码：<input type="password" name="pwd" class="form-control"></p>
<p>确认密码：<input type="password" name="re_pwd" class="form-control"></p>
<p>邮箱<input type="text" name="email" class="form-control"></p>
<input type="submit">
</form>
<h3>方法一</h3>
<form action="" method="post" novalidate> # novalidate代表不使用前端验证
<p>{{ form_obj.name.label }}:{{ form_obj.name }} <span
class="danger">{{ form_obj.name.errors.0 }}</span></p>
<p>{{ form_obj.pwd.label }}:{{ form_obj.pwd }} <span class="danger">{{ form_obj.pwd.errors.0 }}</span>
</p>
<p>{{ form_obj.re_pwd.label }}:{{ form_obj.re_pwd }} <span
class="danger">{{ form_obj.re_pwd.errors.0 }}{{ errors }}</span></p>
<p>{{ form_obj.email.label }}:{{ form_obj.email }} <span
class="danger">{{ form_obj.email.errors.0 }}</span></p>
<input type="submit">
</form>
<h3>方法二</h3>
<form action="" method="post" novalidate>
{% for foo in form_obj %}
<p>{{ foo.label }}:{{ foo }}<span class="danger">{{ foo.errors.0 }}</span></p>
{% endfor %}
{{ errors }}
<input type="submit">
</form>
<h3>方法三</h3>
<form action="" method="post" novalidate>
{{ form_obj.as_p }}
<input type="submit">
</form>
</div>
</div>
</div>
</body>
</html>