1 django 后台实现设置input标签属性，设置input标签默认显示值，设置input输入框类型
# Form生成html标签
a. 通过Form生成Input输入框，Form标签，以及submit标签还是要在前端写的，
但是Form标签内的Input标签可以在后台实现；只需要按以下步骤
- views定义StudentForm(Form)类
- views视图函数将Form实例化对象传递给前端
- 前端{{ obj.段 }}即可 b. 通过Form设置前端Input的type属性,即设置不同类型的输入框
# 设置name为text, cls_id为下拉框
class StudentForm(Form):
name = fields.CharField(widget= widgets.InputText())
cls_id = fields.IntegerField(widget = widgets.Select()) c. 设置下拉框的内容choices属性
class StudentForm(Form):
cls_id = fields.IntegerField(
widget=widgets.Select(choices=models.Classes.objects.values_list('id', 'title'))
)
注意： choices的值必须[元组，(), ()]类型
widget=widgets.Select(choices=[(1, '上海'), (2,'北京')]) d.设置input输入框的class属性 -- attrs
name = fields.CharField(max_length=8, min_length=2,
widget=widgets.TextInput(attrs={'class': 'form-control'})
)
cls_id = fields.IntegerField(
widget=widgets.Select(
choices=models.Classes.objects.values_list('id', 'title'),
attrs={'class': 'form-control'}
)
) 注意： attrs参数必须放在TextInput或者Select等内部，而且值必须为字典 e. 通过Form设置前端Input的默认显示值
只要在视图函数将实例化一个Form对象，并且设置initial值即可
student_dict = models.Student.objects.filter(id=nid).values('name', 'age', 'email', 'cls_id').first()
obj = StudentForm(initial=student_dict)
2 student_list.html上编辑标签
<a href="/app01/edit_student/nid={{ item.id }}" class="glyphicon glyphicon-pencil">编辑</a>|3 编辑学生url
url(r'^edit_student/nid=(?P<nid>\d+)$', views.edit_student),
4 视图
def edit_student(request, nid):
if request.method == "GET":
student = models.Student.objects.filter(id=nid).values('name','age','email','cls_id').first()
obj = StudentForm(initial=student)
return render(request, 'app01_edit_student.html', {'obj':obj, 'nid': nid}) else:
obj = StudentForm(request.POST)
if obj.is_valid():
# 更新数据库
models.Student.objects.filter(id=nid).update(**obj.cleaned_data)
return redirect('/app01/students')
else:
return render(request, 'app01_edit_student.html', {'obj': obj})
5 模板
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Title</title>
<link rel="stylesheet" href="/static/plugins/bootstrap-3.3.7-dist/css/bootstrap.css">
<link rel="stylesheet" href="/static/plugins/font-awesome-4.7.0/css/font-awesome.css">
</head>
<body> <div style="width: 500px; margin:0 auto">
<h4 style="margin-left:20px;" >编辑学生</h4>
<form class="form-horizontal" action="/app01/edit_student/nid={{ nid }}" method="POST">
{% csrf_token %}
<div class="form-group">
<label class="col-sm-2 control-label">姓名:</label>
<div class="col-sm-10">
{{ obj.name }}{{ obj.errors.name.0 }}
</div>
</div> <div class="form-group">
<label class="col-sm-2 control-label">年龄:</label>
<div class="col-sm-10">
{{ obj.age }} {{ obj.errors.age.0 }}
</div>
</div>
<div class="form-group">
<label class="col-sm-2 control-label">邮箱:</label>
<div class="col-sm-10">
{{ obj.email }} {{ obj.errors.email.0 }}
</div>
</div>
<div class="form-group">
<label class="col-sm-2 control-label">班级:</label>
<div class="col-sm-10">
{{ obj.cls_id }} {{ obj.errors.cls_id.0 }}
</div>
</div>
<div class="form-group">
<div class="col-sm-offset-2 col-sm-10">
<input type="submit" class="btn btn-default" value="提交"/>
</div>
</div>
</form>
</div>
</body>
</html>