Django 表单字段选择，添加一个属性

本文介绍了Django 表单字段选择，添加一个属性的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！ 问题描述 PLANNING_CHOICES = ( ('0',u'Every morning'), ('1',u'Every night'), ('2',u'Never'), ) planning = forms.ChoiceField(required=True, choices = PLANNING_CHOICES)

有一个名为planning的表单字段，我需要为选择添加标题属性，最后呈现为:

Having a such form field named planning, I need to add title attribute to choices and in the end renders as this:

<select> <option value="0" title="bla1">Every morning</option> <option value="1" title="bla2">Every night</option> <option value="2" title="bla3">Never</option> </select>

如何实现?

推荐答案

您必须对该字段进行子类化，以采取任何方式指定您喜欢的标题和显示新属性的小部件.

You'd have to subclass the field to take whatever means of specifying the title you'd like and the widget to display the new attribute.

如果你有这样的东西(注意:完全未经测试):

If you had something like this (note: entirely untested):

from django import forms from django.utils.html import escape from django.utils.encoding import force_unicode class SelectWithTitles(forms.Select): def __init__(self, *args, **kwargs): super(SelectWithTitles, self).__init__(*args, **kwargs) # Ensure the titles dict exists self.titles = {} def render_option(self, selected_choices, option_value, option_label): title_html = (option_label in self.titles) and u' title="%s" ' % escape(force_unicode(self.titles[option_label])) or '' option_value = force_unicode(option_value) selected_html = (option_value in selected_choices) and u' selected="selected"' or '' return u'<option value="%s"%s%s>%s</option>' % ( escape(option_value), title_html, selected_html, conditional_escape(force_unicode(option_label))) class ChoiceFieldWithTitles(forms.ChoiceField): widget = SelectWithTitles def __init__(self, choices=(), *args, **kwargs): choice_pairs = [(c[0], c[1]) for c in choices] super(ChoiceFieldWithTitles, self).__init__(choices=choice_pairs, *args, **kwargs) self.widget.titles = dict([(c[1], c[2]) for c in choices])

...你应该能够做到这一点:

...you should be able to do this:

PLANNING_CHOICES_WITH_TITLES = ( ('0', 'Every morning', 'bla1'), ('1', 'Every night', 'bla2'), ('2', 'Never', 'bla3'), ) planning = forms.ChoiceFieldWithTitles( required=True, choices=PLANNING_CHOICES_WITH_TITLES)