django笔记（五）form表单组件

今年回不了家了，看不到农村老家CBD的繁华了，去年在家呆了一个月
今年算是还回去了，出来混迟早都是要还的，只是想不到回来的这么快，哈哈
在深圳第三次过年，本来计划春节前写完15篇django笔记，现在看来是完不成了，
提前祝大家新年快乐
希望明年疫情早点结束，口罩真是带的够够的了。。。

1.基于模型的form

models.py

sex_choice = (

    ('男', 'Male'),

    ('女', 'Famale'),

)

# form表单测试 20200109

class Userinfo(models.Model):

    name=models.CharField(max_length=100)

    age=models.IntegerField(blank=True,null=True)

    sex = models.CharField(max_length=3, choices=sex_choice)  #默认为male

    def __str__(self):

        """Return a string representation of the model."""

        return self.name

forms.py

from django import forms

from .models import Userinfo,sex_choice

class UserinfoForm(forms.ModelForm):

    class Meta:

        model = Userinfo

        fields='__all__'

        #fields=['name','sex']

        #exclude=('age',)

        help_texts = {

            'name': '请输入姓名',

            'sex':'请选择性别',

            'age':'请输入年龄'

        }

        # 在页面上显示的label名称，加*表示必填，因为age可以为空

        labels = {"name": "*姓名","age":"年龄","sex":"*性别"}

        # widgets = {

        #     'name': forms.Textarea(attrs={'cols': 80, 'rows': 20}),

        # }

views.py

from .forms import UserinfoForm

def userinfo(request):

    if request.method == 'GET':

        form = UserinfoForm()

    else:

        form = UserinfoForm(data=request.POST)

        if form.is_valid():

            new_user=form.save(commit=False)  #commit=false表示暂时不提交

            new_user.age=100  #设置其他字段的值，然后保存

            new_user.save()

            return HttpResponse('<h3>新增用户信息成功</h3>')

            #return redirect("myapp:titles")

    content = {'form': form}

    return render(request, 'myapp/userinfo.html', content)

userinfo.hrml

<h1>新增用户</h1>

  <form action="{% url 'myapp:userinfo'%}"  method="post">

        {% csrf_token %}

      {{ form.as_p }}

<input type="submit" value="提交">

    </form>

url.py

    path('userinfo/',views.userinfo,name='userinfo'),

    path('userinfo2/',views.userinfo2,name='userinfo2'),

    path('userinfo3/',views.userinfo2,name='userinfo3'),

2.自定义form

forms.py

# 自定义forms2

from .models import sex_choice

class UserinfoFrom2(forms.Form):

    name = forms.CharField(max_length=100)

    age = forms.IntegerField(required=False,max_value=100,min_value=1)

    sex = forms.CharField(max_length=3,

                          widget=forms.Select(choices=sex_choice))  # 默认为male

  views.py

#2.表单测试2

from .forms import UserinfoFrom2

from .models import Userinfo

def userinfo2(request):

    if request.method == 'GET':

        form = UserinfoFrom2()

    else:

        form = UserinfoFrom2(data=request.POST)

        if form.is_valid():

            data=form.cleaned_data

            Userinfo.objects.create(**data)

            return HttpResponse('<h3>新增用户信息成功</h3>')

    content = {'form': form}

    return render(request, 'myapp/userinfo2.html', content)

userinfo2.html

h1>新增用户</h1>

  <form action="{% url 'myapp:userinfo2'%}"  method="post">

        {% csrf_token %}

      {{ form.as_p }}

<input type="submit" value="提交">

    </form>

3.不使用form组件，直接写表单

userinfo3.html

<h1>新增用户</h1>

  <form action="{% url 'myapp:userinfo3'%}"  method="post">

        {% csrf_token %}

     <p>姓名：<input type="text" name="name"></p>

    <p>年龄：<input type="text" name="age"></p>

    <p>性别：<select name='age'>

   <option value ="男">male</option>

<option value ="女">famle</option>

    </select>

<input type="submit" value="提交">

    </form>

userinfo3.html

from .forms import UserinfoFrom2

from .models import Userinfo

def userinfo3(request):

    if request.method == 'GET':

        return render(request, 'myapp/userinfo3.html')

    else:

        # name=request.POST['name']

        # age=request.POST['age']

        # sex = request.POST['sex']

        Userinfo.objects.create(**request.POST)

        return HttpResponse('<h3>新增用户信息成功</h3>')

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