Django-ModelForm

本文主要是介绍Django-ModelForm，希望对大家解决编程问题提供一定的参考价值，需要的开发者们随着小编来一起学习吧！

作者：武沛齐
出处：Django之ModelForm组件

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ModelForma.  class Meta:model,                           # 对应Model的fields=None,                     # 字段exclude=None,                    # 排除字段labels=None,                     # 提示信息help_texts=None,                 # 帮助提示信息widgets=None,                    # 自定义插件error_messages=None,             # 自定义错误信息（整体错误信息from django.core.exceptions import NON_FIELD_ERRORS）field_classes=None               # 自定义字段类 （也可以自定义字段）localized_fields=('birth_date',) # 本地化，如：根据不同时区显示数据
            如：数据库中2016-12-27 04:10:57setting中的配置TIME_ZONE = 'Asia/Shanghai'USE_TZ = True则显示：2016-12-27 12:10:57b. 验证执行过程is_valid -> full_clean -> 钩子 -> 整体错误c. 字典字段验证def clean_字段名(self):# 可以抛出异常# from django.core.exceptions import ValidationErrorreturn "新值"d. 用于验证model_form_obj = XXOOModelForm()model_form_obj.is_valid()model_form_obj.errors.as_json()model_form_obj.clean()model_form_obj.cleaned_datae. 用于创建model_form_obj = XXOOModelForm(request.POST)#### 页面显示，并提交 ###### 默认保存多对多obj = form.save(commit=True)# 不做任何操作，内部定义 save_m2m（用于保存多对多）obj = form.save(commit=False)obj.save()      # 保存单表信息obj.save_m2m()  # 保存关联多对多信息
 f. 用于更新和初始化obj = model.tb.objects.get(id=1)model_form_obj = XXOOModelForm(request.POST,instance=obj)...PS: 单纯初始化model_form_obj = XXOOModelForm(initial={...})

一个实例：

1. models.py

 1 from django.db import models
 2 
 3 # Create your models here.
 4 
 5 
 6 class UserInfo(models.Model):
 7     name = models.CharField(max_length=32)
 8     email = models.EmailField()
 9     nickName = models.CharField(max_length=32)
10     group = models.ForeignKey('UserGroup', null=True, blank=True)
11     role = models.ManyToManyField('Role', null=True, blank=True)
12 
13     def __str__(self):
14         return self.name
15 
16 
17 class UserGroup(models.Model):
18     name = models.CharField(max_length=32)
19     info = models.TextField()
20 
21     def __str__(self):
22         return self.name
23 
24 
25 class Role(models.Model):
26     name = models.CharField(max_length=32)
27     info = models.TextField()
28 
29     def __str__(self):
30         return self.name

View Code

2. views.py

 1 from django.shortcuts import render,HttpResponse
 2 from django.forms import ModelForm
 3 from django.forms import fields as dfields
 4 from django.forms import widgets as dwidgets
 5 from app01 import models
 6 
 7 
 8 class TestModelForm(ModelForm):
 9     class Meta:
10         model = models.UserInfo
11         fields = '__all__'
12         error_messages = {
13             'name': {
14                 'required': '用户名不能为空',
15             },
16             'email': {
17                 'required': '邮箱不能为空',
18                 'invalid': '邮箱格式不正确',
19             },
20             'nickName': {
21                 'required': '昵称不能为空',
22             }
23         }
24         labels = {
25             'name': '用户名',
26             'email': '邮箱',
27             'nickName': '昵称',
28             'group': '部门',
29             'role': '角色',
30         }
31         widgets = {
32             'name': dwidgets.Input(attrs={'class': 'form-control'}),
33             'email': dwidgets.Input(attrs={'class': 'form-control'}),
34             'nickName': dwidgets.Input(attrs={'class': 'form-control'}),
35             'group': dwidgets.Select(attrs={'class': 'form-control'}),
36             'role': dwidgets.SelectMultiple(attrs={'class': 'form-control'}),
37         }
38 
39 # Create your views here.
40 
41 
42 def test(request):
43     content = {'form': None}
44     if request.method == 'GET':
45         form = TestModelForm()
46         content['form'] = form
47         return render(request, 'test.html', content)
48     else:
49         form = TestModelForm(request.POST)
50         content['form'] = form
51         if form.is_valid():
52             print(form.cleaned_data)
53             form.save()
54             return HttpResponse('add success!')
55         else:
56             return render(request, 'test.html', content)
57 
58 
59 def edit(request, nid):
60     obj = models.UserInfo.objects.filter(id=nid).first()
61     content = {'form': None}
62     if request.method == 'GET':
63         form = TestModelForm(instance=obj)
64         content['form'] = form
65         return render(request, 'edit.html', content)
66     else:
67         form = TestModelForm(instance=obj, data=request.POST, files=request.FILES)
68         if form.is_valid():
69             form.save()
70             return HttpResponse('edit success!')
71         content['form'] = form
72         return render(request, 'test.html', content)

View Code

3. templates

 1 <!DOCTYPE html>
 2 <html lang="en">
 3 <head>
 4     <meta charset="UTF-8">
 5     <link rel="stylesheet" href="/static/plugins/bootstrap-3.3.7-dist/css/bootstrap.css">
 6     <title>Title</title>
 7 </head>
 8 <body>
 9 <form method="post" novalidate>
10     {% csrf_token %}
11     <div class="form-group" style="width: 300px; margin: 50px auto;">
12         {{ form.as_p }}
13         <input type="submit" value="提交">
14     </div>
15 </form>
16 
17 <script src="/static/jquery-3.2.1.js"></script>
18 </body>
19 </html>

test.html

 1 <!DOCTYPE html>
 2 <html lang="en">
 3 <head>
 4     <meta charset="UTF-8">
 5     <link rel="stylesheet" href="/static/plugins/bootstrap-3.3.7-dist/css/bootstrap.css">
 6     <title>Title</title>
 7 </head>
 8 <body>
 9 <form method="post" novalidate>
10     {% csrf_token %}
11     <div class="form-group" style="width: 300px; margin: 50px auto;">
12         {{ form.as_p }}
13         <input type="submit" value="提交">
14     </div>
15 </form>
16 
17 <script src="/static/jquery-3.2.1.js"></script>
18 </body>
19 </html>