Fixed #8422: FilePathField now respects required=False.

        super(FilePathField, self).__init__(choices=(), required=required,

            widget=widget, label=label, initial=initial, help_text=help_text,

            *args, **kwargs)

        if self.required:

            self.choices = []

        else:

            self.choices = [("", "---------")]

        if self.match is not None:

            self.match_re = re.compile(self.match)

        if recursive:

            for root, dirs, files in os.walk(self.path):

                for f in files:

                        self.choices.append((full_file, f))

            except OSError:

                pass

        self.widget.choices = self.choices

class SplitDateTimeField(MultiValueField):

import os

from django.db import models

from django import forms

    class Meta:

        unique_together = (('left', 'middle'), ('middle', 'right'))

class FilePathModel(models.Model):

    path = models.FilePathField(path=os.path.dirname(__file__), match=".*\.py$", blank=True)

__test__ = {'API_TESTS': """

When the same field is involved in multiple unique_together constraints, we

need to make sure we don't remove the data for it before doing all the

>>> form = TripleForm({'left': '1', 'middle': '3', 'right': '1'})

>>> form.is_valid()

True

# Regression test for #8842: FilePathField(blank=True)

>>> class FPForm(forms.ModelForm):

...     class Meta:

...         model = FilePathModel

>>> form = FPForm()

>>> [c[1] for c in form['path'].field.choices]

['---------', '__init__.py', 'models.py']

"""}