Fixed #3297 -- Implemented FileField and ImageField for newforms. Thanks to the many users that contributed to and tested this patch.
git-svn-id: http://code.djangoproject.com/svn/django/trunk@5819 bcc190cf-cafb-0310-a4f2-bffc1f526a37
This commit is contained in:
Russell Keith-Magee
parent
e471f42ba1
commit
fbd1a6277e
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@ -380,6 +380,9 @@ class Field(object):
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return self._choices
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choices = property(_get_choices)
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def save_form_data(self, instance, data):
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setattr(instance, self.name, data)
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def formfield(self, form_class=forms.CharField, **kwargs):
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"Returns a django.newforms.Field instance for this database Field."
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defaults = {'required': not self.blank, 'label': capfirst(self.verbose_name), 'help_text': self.help_text}
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@ -696,6 +699,13 @@ class FileField(Field):
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self.upload_to = upload_to
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Field.__init__(self, verbose_name, name, **kwargs)
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def get_db_prep_save(self, value):
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"Returns field's value prepared for saving into a database."
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# Need to convert UploadedFile objects provided via a form to unicode for database insertion
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if value is None:
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return None
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return unicode(value)
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def get_manipulator_fields(self, opts, manipulator, change, name_prefix='', rel=False, follow=True):
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field_list = Field.get_manipulator_fields(self, opts, manipulator, change, name_prefix, rel, follow)
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if not self.blank:
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@ -772,6 +782,19 @@ class FileField(Field):
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f = os.path.join(self.get_directory_name(), get_valid_filename(os.path.basename(filename)))
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return os.path.normpath(f)
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def save_form_data(self, instance, data):
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if data:
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getattr(instance, "save_%s_file" % self.name)(os.path.join(self.upload_to, data.filename), data.content, save=False)
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def formfield(self, **kwargs):
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defaults = {'form_class': forms.FileField}
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# If a file has been provided previously, then the form doesn't require
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# that a new file is provided this time.
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if 'initial' in kwargs:
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defaults['required'] = False
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defaults.update(kwargs)
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return super(FileField, self).formfield(**defaults)
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class FilePathField(Field):
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def __init__(self, verbose_name=None, name=None, path='', match=None, recursive=False, **kwargs):
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self.path, self.match, self.recursive = path, match, recursive
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@ -820,6 +843,10 @@ class ImageField(FileField):
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setattr(new_object, self.height_field, getattr(original_object, self.height_field))
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new_object.save()
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def formfield(self, **kwargs):
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defaults = {'form_class': forms.ImageField}
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return super(ImageField, self).formfield(**defaults)
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class IntegerField(Field):
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empty_strings_allowed = False
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def get_manipulator_field_objs(self):
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@ -756,6 +756,9 @@ class ManyToManyField(RelatedField, Field):
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"Returns the value of this field in the given model instance."
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return getattr(obj, self.attname).all()
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def save_form_data(self, instance, data):
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setattr(instance, self.attname, data)
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def formfield(self, **kwargs):
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defaults = {'form_class': forms.ModelMultipleChoiceField, 'queryset': self.rel.to._default_manager.all()}
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defaults.update(kwargs)
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@ -53,7 +53,7 @@ class SelectDateWidget(Widget):
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return u'\n'.join(output)
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def value_from_datadict(self, data, name):
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def value_from_datadict(self, data, files, name):
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y, m, d = data.get(self.year_field % name), data.get(self.month_field % name), data.get(self.day_field % name)
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if y and m and d:
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return '%s-%s-%s' % (y, m, d)
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@ -7,10 +7,10 @@ import re
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import time
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from django.utils.translation import ugettext
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from django.utils.encoding import smart_unicode
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from django.utils.encoding import StrAndUnicode, smart_unicode
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from util import ErrorList, ValidationError
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from widgets import TextInput, PasswordInput, HiddenInput, MultipleHiddenInput, CheckboxInput, Select, NullBooleanSelect, SelectMultiple
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from widgets import TextInput, PasswordInput, HiddenInput, MultipleHiddenInput, FileInput, CheckboxInput, Select, NullBooleanSelect, SelectMultiple
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try:
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from decimal import Decimal, DecimalException
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@ -22,7 +22,7 @@ __all__ = (
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'DEFAULT_DATE_INPUT_FORMATS', 'DateField',
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'DEFAULT_TIME_INPUT_FORMATS', 'TimeField',
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'DEFAULT_DATETIME_INPUT_FORMATS', 'DateTimeField',
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'RegexField', 'EmailField', 'URLField', 'BooleanField',
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'RegexField', 'EmailField', 'FileField', 'ImageField', 'URLField', 'BooleanField',
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'ChoiceField', 'NullBooleanField', 'MultipleChoiceField',
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'ComboField', 'MultiValueField', 'FloatField', 'DecimalField',
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'SplitDateTimeField',
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@ -348,6 +348,55 @@ except ImportError:
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# It's OK if Django settings aren't configured.
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URL_VALIDATOR_USER_AGENT = 'Django (http://www.djangoproject.com/)'
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class UploadedFile(StrAndUnicode):
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"A wrapper for files uploaded in a FileField"
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def __init__(self, filename, content):
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self.filename = filename
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self.content = content
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def __unicode__(self):
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"""
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The unicode representation is the filename, so that the pre-database-insertion
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logic can use UploadedFile objects
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"""
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return self.filename
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class FileField(Field):
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widget = FileInput
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def __init__(self, *args, **kwargs):
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super(FileField, self).__init__(*args, **kwargs)
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def clean(self, data):
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super(FileField, self).clean(data)
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if not self.required and data in EMPTY_VALUES:
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return None
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try:
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f = UploadedFile(data['filename'], data['content'])
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except TypeError:
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raise ValidationError(ugettext(u"No file was submitted. Check the encoding type on the form."))
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except KeyError:
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raise ValidationError(ugettext(u"No file was submitted."))
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if not f.content:
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raise ValidationError(ugettext(u"The submitted file is empty."))
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return f
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class ImageField(FileField):
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def clean(self, data):
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"""
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Checks that the file-upload field data contains a valid image (GIF, JPG,
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PNG, possibly others -- whatever the Python Imaging Library supports).
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"""
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f = super(ImageField, self).clean(data)
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if f is None:
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return None
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from PIL import Image
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from cStringIO import StringIO
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try:
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Image.open(StringIO(f.content))
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except IOError: # Python Imaging Library doesn't recognize it as an image
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raise ValidationError(ugettext(u"Upload a valid image. The file you uploaded was either not an image or a corrupted image."))
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return f
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class URLField(RegexField):
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def __init__(self, max_length=None, min_length=None, verify_exists=False,
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validator_user_agent=URL_VALIDATOR_USER_AGENT, *args, **kwargs):
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@ -57,9 +57,10 @@ class BaseForm(StrAndUnicode):
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# class is different than Form. See the comments by the Form class for more
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# information. Any improvements to the form API should be made to *this*
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# class, not to the Form class.
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def __init__(self, data=None, auto_id='id_%s', prefix=None, initial=None):
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self.is_bound = data is not None
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def __init__(self, data=None, files=None, auto_id='id_%s', prefix=None, initial=None):
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self.is_bound = data is not None or files is not None
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self.data = data or {}
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self.files = files or {}
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self.auto_id = auto_id
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self.prefix = prefix
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self.initial = initial or {}
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@ -88,7 +89,7 @@ class BaseForm(StrAndUnicode):
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return BoundField(self, field, name)
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def _get_errors(self):
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"Returns an ErrorDict for self.data"
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"Returns an ErrorDict for the data provided for the form"
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if self._errors is None:
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self.full_clean()
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return self._errors
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@ -179,10 +180,10 @@ class BaseForm(StrAndUnicode):
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return
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self.cleaned_data = {}
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for name, field in self.fields.items():
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# value_from_datadict() gets the data from the dictionary.
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# value_from_datadict() gets the data from the data dictionaries.
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# Each widget type knows how to retrieve its own data, because some
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# widgets split data over several HTML fields.
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value = field.widget.value_from_datadict(self.data, self.add_prefix(name))
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value = field.widget.value_from_datadict(self.data, self.files, self.add_prefix(name))
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try:
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value = field.clean(value)
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self.cleaned_data[name] = value
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@ -283,7 +284,7 @@ class BoundField(StrAndUnicode):
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"""
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Returns the data for this BoundField, or None if it wasn't given.
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"""
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return self.field.widget.value_from_datadict(self.form.data, self.html_name)
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return self.field.widget.value_from_datadict(self.form.data, self.form.files, self.html_name)
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data = property(_data)
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def label_tag(self, contents=None, attrs=None):
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@ -34,7 +34,7 @@ def save_instance(form, instance, fields=None, fail_message='saved', commit=True
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continue
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if fields and f.name not in fields:
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continue
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setattr(instance, f.name, cleaned_data[f.name])
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f.save_form_data(instance, cleaned_data[f.name])
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# Wrap up the saving of m2m data as a function
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def save_m2m():
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opts = instance.__class__._meta
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@ -43,7 +43,7 @@ def save_instance(form, instance, fields=None, fail_message='saved', commit=True
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if fields and f.name not in fields:
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continue
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if f.name in cleaned_data:
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setattr(instance, f.attname, cleaned_data[f.name])
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f.save_form_data(instance, cleaned_data[f.name])
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if commit:
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# If we are committing, save the instance and the m2m data immediately
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instance.save()
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@ -47,7 +47,7 @@ class Widget(object):
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attrs.update(extra_attrs)
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return attrs
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def value_from_datadict(self, data, name):
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def value_from_datadict(self, data, files, name):
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"""
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Given a dictionary of data and this widget's name, returns the value
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of this widget. Returns None if it's not provided.
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@ -113,7 +113,7 @@ class MultipleHiddenInput(HiddenInput):
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final_attrs = self.build_attrs(attrs, type=self.input_type, name=name)
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return u'\n'.join([(u'<input%s />' % flatatt(dict(value=force_unicode(v), **final_attrs))) for v in value])
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def value_from_datadict(self, data, name):
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def value_from_datadict(self, data, files, name):
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if isinstance(data, MultiValueDict):
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return data.getlist(name)
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return data.get(name, None)
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@ -121,6 +121,13 @@ class MultipleHiddenInput(HiddenInput):
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class FileInput(Input):
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input_type = 'file'
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def render(self, name, value, attrs=None):
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return super(FileInput, self).render(name, None, attrs=attrs)
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def value_from_datadict(self, data, files, name):
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"File widgets take data from FILES, not POST"
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return files.get(name, None)
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class Textarea(Widget):
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def __init__(self, attrs=None):
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# The 'rows' and 'cols' attributes are required for HTML correctness.
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@ -188,7 +195,7 @@ class NullBooleanSelect(Select):
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value = u'1'
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return super(NullBooleanSelect, self).render(name, value, attrs, choices)
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def value_from_datadict(self, data, name):
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def value_from_datadict(self, data, files, name):
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value = data.get(name, None)
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return {u'2': True, u'3': False, True: True, False: False}.get(value, None)
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@ -210,7 +217,7 @@ class SelectMultiple(Widget):
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output.append(u'</select>')
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return u'\n'.join(output)
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def value_from_datadict(self, data, name):
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def value_from_datadict(self, data, files, name):
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if isinstance(data, MultiValueDict):
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return data.getlist(name)
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return data.get(name, None)
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@ -377,8 +384,8 @@ class MultiWidget(Widget):
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return id_
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id_for_label = classmethod(id_for_label)
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def value_from_datadict(self, data, name):
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return [widget.value_from_datadict(data, name + '_%s' % i) for i, widget in enumerate(self.widgets)]
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def value_from_datadict(self, data, files, name):
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return [widget.value_from_datadict(data, files, name + '_%s' % i) for i, widget in enumerate(self.widgets)]
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def format_output(self, rendered_widgets):
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"""
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@ -710,6 +710,47 @@ For example::
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</ul>
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</form>
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Binding uploaded files to a form
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--------------------------------
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Dealing with forms that have ``FileField`` and ``ImageField`` fields
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is a little more complicated than a normal form.
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Firstly, in order to upload files, you'll need to make sure that your
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``<form>`` element correctly defines the ``enctype`` as
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``"multipart/form-data"``::
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<form enctype="multipart/form-data" method="post" action="/foo/">
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Secondly, when you use the form, you need to bind the file data. File
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data is handled separately to normal form data, so when your form
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contains a ``FileField`` and ``ImageField``, you will need to specify
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a second argument when you bind your form. So if we extend our
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ContactForm to include an ``ImageField`` called ``mugshot``, we
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need to bind the file data containing the mugshot image::
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# Bound form with an image field
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>>> data = {'subject': 'hello',
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... 'message': 'Hi there',
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... 'sender': 'foo@example.com',
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... 'cc_myself': True}
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>>> file_data = {'mugshot': {'filename':'face.jpg'
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... 'content': <file data>}}
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>>> f = ContactFormWithMugshot(data, file_data)
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In practice, you will usually specify ``request.FILES`` as the source
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of file data (just like you use ``request.POST`` as the source of
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form data)::
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# Bound form with an image field, data from the request
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>>> f = ContactFormWithMugshot(request.POST, request.FILES)
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Constructing an unbound form is the same as always -- just omit both
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form data *and* file data:
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# Unbound form with a image field
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>>> f = ContactFormWithMugshot()
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Subclassing forms
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-----------------
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@ -1099,6 +1140,50 @@ Has two optional arguments for validation, ``max_length`` and ``min_length``.
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If provided, these arguments ensure that the string is at most or at least the
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given length.
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``FileField``
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~~~~~~~~~~~~~
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* Default widget: ``FileInput``
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* Empty value: ``None``
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* Normalizes to: An ``UploadedFile`` object that wraps the file content
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and file name into a single object.
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* Validates that non-empty file data has been bound to the form.
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An ``UploadedFile`` object has two attributes:
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====================== =====================================================
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Argument Description
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====================== =====================================================
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``filename`` The name of the file, provided by the uploading
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client.
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``content`` The array of bytes comprising the file content.
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====================== =====================================================
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The string representation of an ``UploadedFile`` is the same as the filename
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attribute.
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When you use a ``FileField`` on a form, you must also remember to
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`bind the file data to the form`_.
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.. _`bind the file data to the form`: `Binding uploaded files to a form`_
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``ImageField``
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~~~~~~~~~~~~~~
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* Default widget: ``FileInput``
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* Empty value: ``None``
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* Normalizes to: An ``UploadedFile`` object that wraps the file content
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and file name into a single object.
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* Validates that file data has been bound to the form, and that the
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file is of an image format understood by PIL.
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Using an ImageField requires that the `Python Imaging Library`_ is installed.
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When you use a ``FileField`` on a form, you must also remember to
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`bind the file data to the form`_.
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.. _Python Imaging Library: http://www.pythonware.com/products/pil/
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``IntegerField``
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~~~~~~~~~~~~~~~~
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@ -1378,11 +1463,11 @@ the full list of conversions:
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``DateTimeField`` ``DateTimeField``
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``DecimalField`` ``DecimalField``
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``EmailField`` ``EmailField``
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``FileField`` ``CharField``
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``FileField`` ``FileField``
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``FilePathField`` ``CharField``
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``FloatField`` ``FloatField``
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``ForeignKey`` ``ModelChoiceField`` (see below)
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``ImageField`` ``CharField``
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``ImageField`` ``ImageField``
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``IntegerField`` ``IntegerField``
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``IPAddressField`` ``CharField``
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``ManyToManyField`` ``ModelMultipleChoiceField`` (see
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@ -173,27 +173,29 @@ u'<input type="hidden" class="special" value="foo@example.com" name="email" />'
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# FileInput Widget ############################################################
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FileInput widgets don't ever show the value, because the old value is of no use
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if you are updating the form or if the provided file generated an error.
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>>> w = FileInput()
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>>> w.render('email', '')
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u'<input type="file" name="email" />'
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>>> w.render('email', None)
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u'<input type="file" name="email" />'
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>>> w.render('email', 'test@example.com')
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u'<input type="file" name="email" value="test@example.com" />'
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u'<input type="file" name="email" />'
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>>> w.render('email', 'some "quoted" & ampersanded value')
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u'<input type="file" name="email" value="some "quoted" & ampersanded value" />'
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u'<input type="file" name="email" />'
|
||||
>>> w.render('email', 'test@example.com', attrs={'class': 'fun'})
|
||||
u'<input type="file" name="email" value="test@example.com" class="fun" />'
|
||||
u'<input type="file" name="email" class="fun" />'
|
||||
|
||||
You can also pass 'attrs' to the constructor:
|
||||
>>> w = FileInput(attrs={'class': 'fun'})
|
||||
>>> w.render('email', '')
|
||||
u'<input type="file" class="fun" name="email" />'
|
||||
>>> w.render('email', 'foo@example.com')
|
||||
u'<input type="file" class="fun" value="foo@example.com" name="email" />'
|
||||
u'<input type="file" class="fun" name="email" />'
|
||||
|
||||
>>> w.render('email', 'ŠĐĆŽćžšđ', attrs={'class': 'fun'})
|
||||
u'<input type="file" class="fun" value="\u0160\u0110\u0106\u017d\u0107\u017e\u0161\u0111" name="email" />'
|
||||
u'<input type="file" class="fun" name="email" />'
|
||||
|
||||
# Textarea Widget #############################################################
|
||||
|
||||
|
|
@ -1532,6 +1534,42 @@ Traceback (most recent call last):
|
|||
...
|
||||
ValidationError: [u'Ensure this value has at most 15 characters (it has 20).']
|
||||
|
||||
# FileField ##################################################################
|
||||
|
||||
>>> f = FileField()
|
||||
>>> f.clean('')
|
||||
Traceback (most recent call last):
|
||||
...
|
||||
ValidationError: [u'This field is required.']
|
||||
|
||||
>>> f.clean(None)
|
||||
Traceback (most recent call last):
|
||||
...
|
||||
ValidationError: [u'This field is required.']
|
||||
|
||||
>>> f.clean({})
|
||||
Traceback (most recent call last):
|
||||
...
|
||||
ValidationError: [u'No file was submitted.']
|
||||
|
||||
>>> f.clean('some content that is not a file')
|
||||
Traceback (most recent call last):
|
||||
...
|
||||
ValidationError: [u'No file was submitted. Check the encoding type on the form.']
|
||||
|
||||
>>> f.clean({'filename': 'name', 'content':None})
|
||||
Traceback (most recent call last):
|
||||
...
|
||||
ValidationError: [u'The submitted file is empty.']
|
||||
|
||||
>>> f.clean({'filename': 'name', 'content':''})
|
||||
Traceback (most recent call last):
|
||||
...
|
||||
ValidationError: [u'The submitted file is empty.']
|
||||
|
||||
>>> type(f.clean({'filename': 'name', 'content':'Some File Content'}))
|
||||
<class 'django.newforms.fields.UploadedFile'>
|
||||
|
||||
# URLField ##################################################################
|
||||
|
||||
>>> f = URLField()
|
||||
|
|
@ -2573,7 +2611,7 @@ Instances of a dynamic Form do not persist fields from one Form instance to
|
|||
the next.
|
||||
>>> class MyForm(Form):
|
||||
... def __init__(self, data=None, auto_id=False, field_list=[]):
|
||||
... Form.__init__(self, data, auto_id)
|
||||
... Form.__init__(self, data, auto_id=auto_id)
|
||||
... for field in field_list:
|
||||
... self.fields[field[0]] = field[1]
|
||||
>>> field_list = [('field1', CharField()), ('field2', CharField())]
|
||||
|
|
@ -2591,7 +2629,7 @@ the next.
|
|||
... default_field_1 = CharField()
|
||||
... default_field_2 = CharField()
|
||||
... def __init__(self, data=None, auto_id=False, field_list=[]):
|
||||
... Form.__init__(self, data, auto_id)
|
||||
... Form.__init__(self, data, auto_id=auto_id)
|
||||
... for field in field_list:
|
||||
... self.fields[field[0]] = field[1]
|
||||
>>> field_list = [('field1', CharField()), ('field2', CharField())]
|
||||
|
|
@ -3246,6 +3284,35 @@ is different than its data. This is handled transparently, though.
|
|||
<option value="3" selected="selected">No</option>
|
||||
</select>
|
||||
|
||||
# Forms with FileFields ################################################
|
||||
|
||||
FileFields are a special case because they take their data from the request.FILES,
|
||||
not request.POST.
|
||||
|
||||
>>> class FileForm(Form):
|
||||
... file1 = FileField()
|
||||
>>> f = FileForm(auto_id=False)
|
||||
>>> print f
|
||||
<tr><th>File1:</th><td><input type="file" name="file1" /></td></tr>
|
||||
|
||||
>>> f = FileForm(data={}, files={}, auto_id=False)
|
||||
>>> print f
|
||||
<tr><th>File1:</th><td><ul class="errorlist"><li>This field is required.</li></ul><input type="file" name="file1" /></td></tr>
|
||||
|
||||
>>> f = FileForm(data={}, files={'file1': {'filename': 'name', 'content':''}}, auto_id=False)
|
||||
>>> print f
|
||||
<tr><th>File1:</th><td><ul class="errorlist"><li>The submitted file is empty.</li></ul><input type="file" name="file1" /></td></tr>
|
||||
|
||||
>>> f = FileForm(data={}, files={'file1': 'something that is not a file'}, auto_id=False)
|
||||
>>> print f
|
||||
<tr><th>File1:</th><td><ul class="errorlist"><li>No file was submitted. Check the encoding type on the form.</li></ul><input type="file" name="file1" /></td></tr>
|
||||
|
||||
>>> f = FileForm(data={}, files={'file1': {'filename': 'name', 'content':'some content'}}, auto_id=False)
|
||||
>>> print f
|
||||
<tr><th>File1:</th><td><input type="file" name="file1" /></td></tr>
|
||||
>>> f.is_valid()
|
||||
True
|
||||
|
||||
# Basic form processing in a view #############################################
|
||||
|
||||
>>> from django.template import Template, Context
|
||||
|
|
|
|||
Loading…
Reference in New Issue