cdf

class DateField

from django.forms import DateField
Documentation Source code

Ancestors (MRO)

  1. DateField
  2. BaseTemporalField
  3. Field

Attributes

  Defined in
default_error_messages = {'invalid': 'Enter a valid date.'} DateField
default_error_messages = {'required': 'This field is required.'} Field
default_validators = [] Field
empty_values = [None, '', [], (), {}] Field
input_formats = ['%Y-%m-%d', '%m/%d/%Y', '%m/%d/%y', '%b %d %Y', '%b %d, %Y', '%d %b %Y', '%d %b, %Y', '%B %d %Y', '%B %d, %Y', '%d %B %Y', '%d %B, %Y'] DateField
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Methods

def bound_data(self, data, initial): Field 

        Return the value that should be shown for this field on render of a
        bound form, given the submitted POST data for the field and the initial
        data, if any.

        For most fields, this will simply be data; FileFields need to handle it
        a bit differently.
        
    def bound_data(self, data, initial):
        """
        Return the value that should be shown for this field on render of a
        bound form, given the submitted POST data for the field and the initial
        data, if any.

        For most fields, this will simply be data; FileFields need to handle it
        a bit differently.
        """
        if self.disabled:
            return initial
        return data

def clean(self, value): Field 

        Validate the given value and return its "cleaned" value as an
        appropriate Python object. Raise ValidationError for any errors.
        
    def clean(self, value):
        """
        Validate the given value and return its "cleaned" value as an
        appropriate Python object. Raise ValidationError for any errors.
        """
        value = self.to_python(value)
        self.validate(value)
        self.run_validators(value)
        return value

def get_bound_field(self, form, field_name): Field 

        Return a BoundField instance that will be used when accessing the form
        field in a template.
        
    def get_bound_field(self, form, field_name):
        """
        Return a BoundField instance that will be used when accessing the form
        field in a template.
        """
        return BoundField(form, self, field_name)

def has_changed(self, initial, data): Field 

Return True if data differs from initial.
    def has_changed(self, initial, data):
        """Return True if data differs from initial."""
        # Always return False if the field is disabled since self.bound_data
        # always uses the initial value in this case.
        if self.disabled:
            return False
        try:
            data = self.to_python(data)
            if hasattr(self, '_coerce'):
                return self._coerce(data) != self._coerce(initial)
        except ValidationError:
            return True
        # For purposes of seeing whether something has changed, None is
        # the same as an empty string, if the data or initial value we get
        # is None, replace it with ''.
        initial_value = initial if initial is not None else ''
        data_value = data if data is not None else ''
        return initial_value != data_value

def prepare_value(self, value): Field 

    def prepare_value(self, value):
        return value

def run_validators(self, value): Field 

    def run_validators(self, value):
        if value in self.empty_values:
            return
        errors = []
        for v in self.validators:
            try:
                v(value)
            except ValidationError as e:
                if hasattr(e, 'code') and e.code in self.error_messages:
                    e.message = self.error_messages[e.code]
                errors.extend(e.error_list)
        if errors:
            raise ValidationError(errors)

def strptime(self, value, format):

DateField

    def strptime(self, value, format):
        return datetime.datetime.strptime(value, format).date()

BaseTemporalField

    def strptime(self, value, format):
        raise NotImplementedError('Subclasses must define this method.')

def to_python(self, value):

DateField

        Validate that the input can be converted to a date. Return a Python
        datetime.date object.
        
    def to_python(self, value):
        """
        Validate that the input can be converted to a date. Return a Python
        datetime.date object.
        """
        if value in self.empty_values:
            return None
        if isinstance(value, datetime.datetime):
            return value.date()
        if isinstance(value, datetime.date):
            return value
        return super().to_python(value)

BaseTemporalField

    def to_python(self, value):
        value = value.strip()
        # Try to strptime against each input format.
        for format in self.input_formats:
            try:
                return self.strptime(value, format)
            except (ValueError, TypeError):
                continue
        raise ValidationError(self.error_messages['invalid'], code='invalid')

Field

    def to_python(self, value):
        return value

def validate(self, value): Field 

    def validate(self, value):
        if value in self.empty_values and self.required:
            raise ValidationError(self.error_messages['required'], code='required')

def widget_attrs(self, widget): Field 

        Given a Widget instance (*not* a Widget class), return a dictionary of
        any HTML attributes that should be added to the Widget, based on this
        Field.
        
    def widget_attrs(self, widget):
        """
        Given a Widget instance (*not* a Widget class), return a dictionary of
        any HTML attributes that should be added to the Widget, based on this
        Field.
        """
        return {}