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這篇文章將為大家詳細講解有關forms組件如何在Django中使用，文章內容質量較高，因此小編分享給大家做個參考，希望大家閱讀完這篇文章后對相關知識有一定的了解。
一，forms組件：
校驗字段功能
針對一個實例：注冊用戶講解。
模型：models.py
class UserInfo(models.Model): name=models.CharField(max_length=32) pwd=models.CharField(max_length=32) email=models.EmailField() tel=models.CharField(max_length=32)
模板: register.html:
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Title</title>
</head>
<body>
<form action="" method="post">
{% csrf_token %}
<div>
<label for="user">用戶名</label>
<p><input type="text" name="name" id="name"></p>
</div>
<div>
<label for="pwd">密碼</label>
<p><input type="password" name="pwd" id="pwd"></p>
</div>
<div>
<label for="r_pwd">確認密碼</label>
<p><input type="password" name="r_pwd" id="r_pwd"></p>
</div>
<div>
<label for="email">郵箱</label>
<p><input type="text" name="email" id="email"></p>
</div>
<input type="submit">
</form>
</body>
</html>視圖函數：register
# forms組件
from django.forms import widgets
wid_01=widgets.TextInput(attrs={"class":"form-control"})
wid_02=widgets.PasswordInput(attrs={"class":"form-control"})
class UserForm(forms.Form):
name=forms.CharField(max_length=32,
widget=wid_01
)
pwd=forms.CharField(max_length=32,widget=wid_02)
r_pwd=forms.CharField(max_length=32,widget=wid_02)
email=forms.EmailField(widget=wid_01)
tel=forms.CharField(max_length=32,widget=wid_01)
def register(request):
if request.method=="POST":
form=UserForm(request.POST)
if form.is_valid():
print(form.cleaned_data) # 所有干凈的字段以及對應的值
else:
print(form.cleaned_data) #
print(form.errors) # ErrorDict : {"校驗錯誤的字段":["錯誤信息",]}
print(form.errors.get("name")) # ErrorList ["錯誤信息",]
return HttpResponse("OK")
form=UserForm()
return render(request,"register.html",locals())1，渲染標簽功能
渲染方式1
<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <title>Title</title> <!-- 最新版本的 Bootstrap 核心 CSS 文件 --> <link rel="stylesheet" href="https://cdn.bootcss.com/bootstrap/3.3.7/css/bootstrap.min.css" rel="external nofollow" integrity="sha384-BVYiiSIFeK1dGmJRAkycuHAHRg32OmUcww7on3RYdg4Va+PmSTsz/K68vbdEjh5u" crossorigin="anonymous"> </head> <body> <h4>注冊頁面</h4> <div class="container"> <div class="row"> <div class="col-md-6 col-lg-offset-3"> <form action="" method="post"> {% csrf_token %} <div> <label for="">用戶名</label> {{ form.name }} </div> <div> <label for="">密碼</label> {{ form.pwd }} </div> <div> <label for="">確認密碼</label> {{ form.r_pwd }} </div> <div> <label for=""> 郵箱</label> {{ form.email }} </div> <input type="submit" class="btn btn-default pull-right"> </form> </div> </div> </div> </body> </html>
渲染方式2
<form action="" method="post">
{% csrf_token %}
{% for field in form %}
<div>
<label for="">{{ field.label }}</label>
{{ field }}
</div>
{% endfor %}
<input type="submit" class="btn btn-default pull-right">
</form>渲染方式3
<form action="" method="post">
{% csrf_token %}
{{ form.as_p }}
<input type="submit" class="btn btn-default pull-right">
</form>2，顯示錯誤與重置輸入信息功能
視圖
def register(request):
if request.method=="POST":
form=UserForm(request.POST)
if form.is_valid():
print(form.cleaned_data) # 所有干凈的字段以及對應的值
else:
print(form.cleaned_data) #
print(form.errors) # ErrorDict : {"校驗錯誤的字段":["錯誤信息",]}
print(form.errors.get("name")) # ErrorList ["錯誤信息",]
return render(request,"register.html",locals())
form=UserForm()
return render(request,"register.html",locals())模板
<form action="" method="post" novalidate>
{% csrf_token %}
{% for field in form %}
<div>
<label for="">{{ field.label }}</label>
{{ field }} <span class="pull-right" >{{ field.errors.0 }}</span>
</div>
{% endfor %}
<input type="submit" class="btn btn-default">
</form>3，局部鉤子與全局鉤子
模板
# forms組件
from django.forms import widgets
wid_01=widgets.TextInput(attrs={"class":"form-control"})
wid_02=widgets.PasswordInput(attrs={"class":"form-control"})
from django.core.exceptions import ValidationError
class UserForm(forms.Form):
name=forms.CharField(max_length=32,
widget=wid_01
)
pwd=forms.CharField(max_length=32,widget=wid_02)
r_pwd=forms.CharField(max_length=32,widget=wid_02)
email=forms.EmailField(widget=wid_01)
tel=forms.CharField(max_length=32,widget=wid_01)
# 局部鉤子
def clean_name(self):
val=self.cleaned_data.get("name")
if not val.isdigit():
return val
else:
raise ValidationError("用戶名不能是純數字!")
# 全局鉤子
def clean(self):
pwd=self.cleaned_data.get("pwd")
r_pwd=self.cleaned_data.get("r_pwd")
if pwd==r_pwd:
return self.cleaned_data
else:
raise ValidationError('兩次密碼不一致!')
def register(request):
if request.method=="POST":
form=UserForm(request.POST)
if form.is_valid():
print(form.cleaned_data) # 所有干凈的字段以及對應的值
else:
clean_error=form.errors.get("__all__")
return render(request,"register.html",locals())
form=UserForm()
return render(request,"register.html",locals())視圖
<form action="" method="post" novalidate>
{% csrf_token %}
{% for field in form %}
<div>
<label for="">{{ field.label }}</label>
{{ field }}
<span class="pull-right" >
{% if field.label == 'R pwd' %}
<span>{{ clean_error.0 }}</span>
{% endif %}
{{ field.errors.0 }}
</span>
</div>
{% endfor %}
<input type="submit" class="btn btn-default">
</form>關于forms組件如何在Django中使用就分享到這里了，希望以上內容可以對大家有一定的幫助，可以學到更多知識。如果覺得文章不錯，可以把它分享出去讓更多的人看到。
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