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  • django组件-forms组件

    forms组件

    校验字段功能

    针对一个实例:注册用户讲解。

    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">用户名</label>
            <p><input type="text" name="name" id="name"></p>
        </div>
        <div>
            <label for="pwd">密码</label>
            <p><input type="password" name="pwd" id="pwd"></p>
        </div>
        <div>
            <label for="r_pwd">确认密码</label>
            <p><input type="password" name="r_pwd" id="r_pwd"></p>
        </div>
         <div>
            <label for="email">邮箱</label>
            <p><input type="text" name="email" id="email"></p>
        </div>
        <input type="submit">
    </form>
    
    </body>
    </html>

    视图函数:register

    # forms组件
    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)       # 所有干净的字段以及对应的值
            else:
                print(form.cleaned_data)       #
                print(form.errors)             # ErrorDict : {"校验错误的字段":["错误信息",]}
                print(form.errors.get("name")) # ErrorList ["错误信息",]
            return HttpResponse("OK")
        form=UserForm()
        return render(request,"register.html",locals())

    渲染标签功能 

    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" integrity="sha384-BVYiiSIFeK1dGmJRAkycuHAHRg32OmUcww7on3RYdg4Va+PmSTsz/K68vbdEjh4u" crossorigin="anonymous">
    </head>
    <body>
    <h3>注册页面</h3>
    <div class="container">
        <div class="row">
            <div class="col-md-6 col-lg-offset-3">
    
                    <form action="" method="post">
                        {% csrf_token %}
                        <div>
                            <label for="">用户名</label>
                            {{ form.name }}
                        </div>
                        <div>
                            <label for="">密码</label>
                            {{ form.pwd }}
                        </div>
                        <div>
                            <label for="">确认密码</label>
                            {{ form.r_pwd }}
                        </div>
                        <div>
                            <label for=""> 邮箱</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>

    显示错误与重置输入信息功能

    视图

    def register(request):
    
        if request.method=="POST":
            form=UserForm(request.POST)
            if form.is_valid():
                print(form.cleaned_data)       # 所有干净的字段以及对应的值
            else:
                print(form.cleaned_data)       #
                print(form.errors)             # ErrorDict : {"校验错误的字段":["错误信息",]}
                print(form.errors.get("name")) # ErrorList ["错误信息",]
            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" style="color: red">{{ field.errors.0 }}</span>
            </div>
        {% endfor %}
        <input type="submit" class="btn btn-default">
    
    </form>

     

    局部钩子与全局钩子

    模板

    # forms组件
    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)
    
    
        # 局部钩子
        def clean_name(self):
            val=self.cleaned_data.get("name")
            if not val.isdigit():
                return val
            else:
                raise ValidationError("用户名不能是纯数字!")
    
        # 全局钩子
    
        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('两次密码不一致!')
    
    
    def register(request):
    
        if request.method=="POST":
            form=UserForm(request.POST)
            if form.is_valid():
                print(form.cleaned_data)       # 所有干净的字段以及对应的值
            else:
                clean_error=form.errors.get("__all__")
    
            return render(request,"register.html",locals())
        form=UserForm()
        return render(request,"register.html",locals())

    视图

    <form action="" method="post" novalidate>
                {% csrf_token %}
    
                {% for field in form %}
                    <div>
                        <label for="">{{ field.label }}</label>
                        {{ field }}
                        <span class="pull-right" style="color: red">
                              {% 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>
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  • 原文地址:https://www.cnblogs.com/xihuxiangri/p/9897369.html
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