Django Forms实例 | 易学教程

# Django的Form主要具有一下几大功能：
#
#     生成HTML标签
#     验证用户数据（显示错误信息）
#     HTML Form提交保留上次提交数据
#     初始化页面显示内容

# forms组件生成HTML标签格式
# class 表名Form(Form):
#     字段名 = fields.字段类型(
#         初始值,
#         widgets=widgets.插件(attrs={html属性标签 字典格式})
#     )

1.urls.py

url(r'^student', student),

2.models.py

from django.db import models

# Create your models here.
class Class(models.Model):
    title = models.CharField(max_length=32)
    teachers = models.ManyToManyField("Teacher")

    def __str__(self):
        return self.title


class Teacher(models.Model):
    name = models.CharField(max_length=32)

    def __str__(self):
        return self.name


class Student(models.Model):
    username = models.CharField(max_length=16,unique=True)
    age = models.IntegerField()
    gender = models.BooleanField()
    classes = models.ForeignKey("Class")

    def __str__(self):
        return self.username

2.form.py

from .models import Student, Class, Teacher
# Create your froms here.
from django.forms import Form
from django.forms import widgets
from django.forms import fields

class StudentForm(Form):
    username = fields.CharField()(
　　　　　widget=widgets.TextInput(attrs={"style":"color:red;"},)
   )
    age = fields.IntegerField()

    gender = fields.ChoiceField(
        choices=((1, "男"), (0, "女"),),
        initial=1,
        widget=widgets.Select
    )
    classes = fields.IntegerField(
        initial=1,
        widget=widgets.Select()
    )
　　　　
　　
　　# 绑定动态数据
    def __init__(self, *args, **kwargs):
        super(StudentForm, self).__init__(*args, **kwargs)
        self.fields["classes"].widget.choices = Class.objects.all().values_list("id", "title")

4.views.py

from .forms import StudentForm
from .models import Student,Class,Teacher
def student(request):
    if request.method == "GET":
        obj = StudentForm()
        return render(request, "t1/student.html", locals())
    elif request.method == "POST":
        obj = StudentForm(request.POST)
        if obj.is_valid():
            try:
                val = obj.clean()
                print(val)
                Student.objects.create(username=val["username"], age=val["age"], gender=val["gender"],
                                       classes_id=val["classes"])
                return HttpResponse(val["username"] + "添加完成")
            except Exception as e:
                return HttpResponse("数据错误，请重新输入")

        else:
            print(obj.clean())
            return HttpResponse("ERROR")

    else:
        return HttpResponse("error")

5.student.html

<!DOCTYPE html>
<html lang="zh-CN">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>
<form action="/student/" method="POST" enctype="multipart/form-data">
    {% csrf_token %}

    <p>用户名：{{ obj.username }} {{ obj.username.errors }}</p>
    <p>年&nbsp;&nbsp;龄：{{ obj.age }}{{ obj.age.errors }}</p>
    <p>性&nbsp;&nbsp;别：{{ obj.gender }}</p>
    <p>班&nbsp;&nbsp;级：{{ obj.classes }}</p>

    <input type="submit"value="添加用户"/>
</form>
</body>
</html>

来源：oschina

链接：https://my.oschina.net/u/4361176/blog/3611485

标签

def

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django