flask - flask wtf中如何从SelectField获取选中的数据

Question

select = SelectField("City")

form.select.choices = [(places['name'], places['name']) for places in place]

现在我想从selectfield中获取选中的数据

Answer 1

您可以覆盖表单类初始化方法。

我给出了例子和清晰的解释:

模型.py

class Place(db.Model):
    name = db.Column(db.String(40), unique=True)

表单.py

from flask.ext.wtf import Form
from wtforms import SelectField

class PlaceForm(Form):
    name_list = SelectField(u'Choose the place')

    def __init__(self, *args, **kwargs):
        self.name_list.choices = [(obj.id, obj.name) for obj in Place.query.order_by('name')]

在模板中

 <div class="control-group{% if form.errors.name_list %} error{% endif %}">
                            {{ form.name_list(placeholder="--select--") }}
                            {% for error in form.errors.name_list %}
                                <span class="help-inline">{{error}}</span><br>
                            {% endfor %}

</div>
make sure you are passing the form to this template in your views.py.

这应该可行。我认为您可以很好地理解这段代码。