该代码非常不言自明 - 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
我怎样才能达到想要的效果？
我遇到了与此非常相似的问题，我花了一段时间才弄清楚。你想做的事情可以这样完成：
from wtforms.fields.core import Label
class FooForm(FlaskForm):
bar_field = StringField("Label does not matter")
@app.route('/')
def index():
eggs = 'bar'
form = FooForm()
form.bar_field.label = Label("bar_field", "Label's last word is 'bar': {0}".format(eggs))
return render_template_string(
'''
{{ form.bar_field.label }} {{ form.bar_field }}
''',form = form)
请参阅我在这里提出的问题及其答案：Flaskform 传递变量 (WTForms) https://stackoverflow.com/questions/51181324/flaskform-pass-a-variable-wtforms/51181817#51181817
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