Question

代码非常明显 - 我想将一个变量传递给FlaskForm子类以供进一步使用。

from flask import Flask, render_template_string
from flask_wtf import FlaskForm
from wtforms import StringField
from flask_wtf.csrf import CSRFProtect


app = Flask(__name__)
spam = 'bar'
app.secret_key = 'secret'
csrf = CSRFProtect(app)

@app.route('/')
def index():
    eggs = spam
    form = FooForm(eggs)
    return render_template_string(
    '''
    {{ form.bar_field.label }} {{ form.bar_field }}
    ''',form = form)

class FooForm(FlaskForm):
    def __init__(self, bar):
        super(FooForm, self).__init__()
        self.bar = bar
    bar_field = StringField("Label's last word is 'bar': {0}".format(self.bar))

if __name__ == '__main__':
    app.run(debug=True)

我得到的是

line 22, in FooForm
    bar_field = StringField("Label's last word is 'bar': {0}".format(self.bar))
NameError: name 'self' is not defined

我如何实现所需？

Answer 1

我有一个与此非常相似的问题，花了我一段时间才弄清楚。您想要做的事情可以像这样完成：

setDT(d1)[, as.list(coef(lm(val3 ~ val1 + val2))), id][d1, on = .(id)]

在此处查看我提出的问题和答案：flaskform pass a variable (WTForms)

Answer 2

将您的bar_field = StringField("Label's last word is 'bar': {0}".format(self.bar))置于 init （）方法中。用这个：

class FooForm(FlaskForm):
def __init__(self, bar):
    super(FooForm, self).__init__()
    self.bar = bar
    self.bar_field = StringField("Label's last word is 'bar': {0}".format(self.bar))

传递给FlaskForm（WTForms）中的变量并使用它

2 个答案: