CODEWITHSUNDEEP
pythonflaskflask-wtformsflask-bootstrap
otwtm
otwtm

Reputation: 1999

Render WTF FieldList of SelectFields with Bootstrap

I would like to render a flask_wtf form with bootstrap/wtf.html. The form contains a regular SelectField and a FieldList of SelectFields. To render the single SelectField works fine using the function wtf.form_field. However, applying the same function to each SelectField of the FieldList raises an error:

  File "/usr/local/lib/python3.5/dist-packages/flask_bootstrap/templates/bootstrap/wtf.html", line 119, in template
    {{field.label(class="control-label")|safe}}
TypeError: 'str' object is not callable

My interpretation of the error is that the string "field.label" was called like a function using parentheses. On the other hand, the same seems to work for the single SelectField.

Here is form.py:

from flask_wtf import FlaskForm
from wtforms import SelectField, FieldList, FormField

class FormEntry(FlaskForm):
    selectfield = SelectField('Name', coerce=int)

class MyForm(FlaskForm):
    selectfield = SelectField('Name', coerce=int, choices=[(2, "choice 2"), (1, "choice 1")])
    form_entries = FieldList(FormField(FormEntry))

And here is render.html: 

 {% extends 'bootstrap/base.html' %}
 {% import 'bootstrap/wtf.html' as wtf %}

 {{ form.hidden_tag() }}
 {{ wtf.form_field(form.selectfield) }}
 {% for entry in form.form_entries %}
     {{ wtf.form_field(entry.selectfield) }}
 {% endfor %}

Upvotes: 2

Views: 711

Answers (1)

otwtm
otwtm

Reputation: 1999

I found the error source. In my script, I assigned the labels of the selectfields of FormEntry dynamically by 

selectfield.label = "some_string"

However, the label of an SelectField is no a string but an object that contains a string variable text. Replacing the above line of code to

selectfield.label.text = "some_string"

did the job.

Upvotes: 1

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