Flask-wtf can't set default value for DateTimeField

user_13491139 0
Viewed 691

I'm making a project on Flask and I need to set the default value for the wtforms.DateTimeField()

def new_edit_task(task):
    class EditTask(FlaskForm):
        new_name = StringField('Name of task', validators=[DataRequired()], default=task.name)
        new_description = TextAreaField('Description', validators=[DataRequired()], default=task.description)
        new_deadline = DateTimeField("Deadline", format='%Y-%m-%dT%H:%M',
                                     default=task.deadline)
        new_link = StringField('Email', validators=[DataRequired()], default=task.link)
        submit = SubmitField('Отправить')
    return EditTask()

task is an SQLAlchemy model and task.deadline is datetime.datetime object.

That's how I render new_deadline field in HTML:

{{ form.new_deadline(class="half-width", type='datetime-local') }}<br>
      {% for error in form.new_deadline.errors %}
      <p class="alert alert-danger" role="alert">
                {{ error }}
            </p>
        {% endfor %}

form is EditForm object here

But it doesn't work. There is "dd.mm.yyyy --:--" on the page.

Can you please explain to me what am I doing wrong?

flask jinja2 html python
2 Answers

Your task.deadline returns just value from database. I suppose in dd.mm.yyyy format. Please note that format='%Y-%m-%dT%H:%M' do nothing with default data. This pattern is for checking input data.

task.deadline value should be reformatted properly before using in form.

user_128515760

So, I've solved the problem.

Instead of using DateTimeField and rendering this field with type="datetime-local", I use DateTimeLocalField from wtforms.field.html5. And that's actually works!

user_134911390
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