– バリデーションはsaveの時に実行されるので、モデルの更新時にはモデル側でバリデーションをかける
/hello/forms.py
class FriendForm(forms.ModelForm): class Meta: model = Friend fields = ['name','mail','gender','age','birthday']
/hello/models.py
class Friend(models.Model): name = models.CharField(max_length=100) mail = models.EmailField(max_length=200) gender = models.BooleanField() age = models.IntegerField(default=0) birthday = models.DateField()
– save以外に自分でチェックをかけることも可能
/hello/views.py
def check(request):
params = {
'title': 'Hello',
'message': 'check validation.',
'form': FriendForm(),
}
if(request.method == 'POST'):
obj = Friend()
form = FriendForm(request.POST, instance=obj)
params['form'] = form
if(form.is_valid()):
params['message'] = 'OK!'
else:
params['message'] = 'no good.'
return render(request, 'hello/check.html', params)
/hello/templates/hello/check.html
<body class="container">
<h1 class="display-4 text-primary">{{title}}</h1>
<p>{{message|safe}}</p>
<form action="{% url 'check' %}" method="post">
{% csrf_token %}
<table class="table">
{{ form.as_table }}
<tr><th></th><td>
<input type="submit" value="click" class="btn btn-primary mt-2">
</td></tr>
</table>
</form>
</body>
– forms.FormとModelFormのバリデーションは異なる
### モデルにバリデーションの組み込み
/hello/models.py
from django.db import models from django.core.validators import MinValueValidator, MaxValueValidator class Friend(models.Model): name = models.CharField(max_length=100) mail = models.EmailField(max_length=200) gender = models.BooleanField() age = models.IntegerField(validators=[MinValueValidator(0), MaxValueValidator(150)]) birthday = models.DateField()
### モデルで使えるバリデータ
– MinValueValidator/MaxValueValidator, MinLengthValidator/MaxLengthValidator
from django.db import models from django.core.validators import MinLengthValidator class Friend(models.Model): name = models.CharField(max_length=100, validators=[MinLengthValidator(10)]) mail = models.EmailField(max_length=200, validators=[MinLengthValidator(10)]) gender = models.BooleanField() age = models.IntegerField() birthday = models.DateField()
– EmailValidator/URLValidator
– ProhibitNullCharactersValidator
– RegexValidator
from django.core.validators import RegexValidator class Friend(models.Model): name = models.CharField(max_length=100, validators=[RegexValidator(r'^[a-z]*$')])
バリデーション定義によってmodelに組み込んでいくイメージです。
