Python Field.validate方法代码示例

# 需要导入模块: from django.forms.fields import Field [as 别名]
# 或者: from django.forms.fields.Field import validate [as 别名]
def save(self, commit=True):
        """
        Save this form's self.instance object if commit=True. Otherwise, add
        a save_m2m() method to the form which can be called after the instance
        is saved manually at a later time. Return the model instance.
        """
        if self.errors:
            raise ValueError(
                "The %s could not be %s because the data didn't validate." % (
                    self.instance._meta.object_name,
                    'created' if self.instance._state.adding else 'changed',
                )
            )
        if commit:
            # If committing, save the instance and the m2m data immediately.
            self.instance.save()
            self._save_m2m()
        else:
            # If not committing, add a method to the form to allow deferred
            # saving of m2m data.
            self.save_m2m = self._save_m2m
        return self.instance 

# 需要导入模块: from django.forms.fields import Field [as 别名]
# 或者: from django.forms.fields.Field import validate [as 别名]
def _get_validation_exclusions(self):
        """
        For backwards-compatibility, several types of fields need to be
        excluded from model validation. See the following tickets for
        details: #12507, #12521, #12553
        """
        exclude = []
        # Build up a list of fields that should be excluded from model field
        # validation and unique checks.
        for f in self.instance._meta.fields:
            field = f.name
            # Exclude fields that aren't on the form. The developer may be
            # adding these values to the model after form validation.
            if field not in self.fields:
                exclude.append(f.name)

            # Don't perform model validation on fields that were defined
            # manually on the form and excluded via the ModelForm's Meta
            # class. See #12901.
            elif self._meta.fields and field not in self._meta.fields:
                exclude.append(f.name)
            elif self._meta.exclude and field in self._meta.exclude:
                exclude.append(f.name)

            # Exclude fields that failed form validation. There's no need for
            # the model fields to validate them as well.
            elif field in self._errors.keys():
                exclude.append(f.name)

            # Exclude empty fields that are not required by the form, if the
            # underlying model field is required. This keeps the model field
            # from raising a required error. Note: don't exclude the field from
            # validation if the model field allows blanks. If it does, the blank
            # value may be included in a unique check, so cannot be excluded
            # from validation.
            else:
                form_field = self.fields[field]
                field_value = self.cleaned_data.get(field, None)
                if not f.blank and not form_field.required and field_value in form_field.empty_values:
                    exclude.append(f.name)
        return exclude 

# 需要导入模块: from django.forms.fields import Field [as 别名]
# 或者: from django.forms.fields.Field import validate [as 别名]
def validate(self, value):
        return Field.validate(self, value) 

# 需要导入模块: from django.forms.fields import Field [as 别名]
# 或者: from django.forms.fields.Field import validate [as 别名]
def _get_validation_exclusions(self):
        """
        For backwards-compatibility, exclude several types of fields from model
        validation. See tickets #12507, #12521, #12553.
        """
        exclude = []
        # Build up a list of fields that should be excluded from model field
        # validation and unique checks.
        for f in self.instance._meta.fields:
            field = f.name
            # Exclude fields that aren't on the form. The developer may be
            # adding these values to the model after form validation.
            if field not in self.fields:
                exclude.append(f.name)

            # Don't perform model validation on fields that were defined
            # manually on the form and excluded via the ModelForm's Meta
            # class. See #12901.
            elif self._meta.fields and field not in self._meta.fields:
                exclude.append(f.name)
            elif self._meta.exclude and field in self._meta.exclude:
                exclude.append(f.name)

            # Exclude fields that failed form validation. There's no need for
            # the model fields to validate them as well.
            elif field in self._errors:
                exclude.append(f.name)

            # Exclude empty fields that are not required by the form, if the
            # underlying model field is required. This keeps the model field
            # from raising a required error. Note: don't exclude the field from
            # validation if the model field allows blanks. If it does, the blank
            # value may be included in a unique check, so cannot be excluded
            # from validation.
            else:
                form_field = self.fields[field]
                field_value = self.cleaned_data.get(field)
                if not f.blank and not form_field.required and field_value in form_field.empty_values:
                    exclude.append(f.name)
        return exclude 

# 需要导入模块: from django.forms.fields import Field [as 别名]
# 或者: from django.forms.fields.Field import validate [as 别名]
def _get_validation_exclusions(self):
        """
        For backwards-compatibility, several types of fields need to be
        excluded from model validation. See the following tickets for
        details: #12507, #12521, #12553
        """
        exclude = []
        # Build up a list of fields that should be excluded from model field
        # validation and unique checks.
        for f in self.instance._meta.fields:
            field = f.name
            # Exclude fields that aren't on the form. The developer may be
            # adding these values to the model after form validation.
            if field not in self.fields:
                exclude.append(f.name)

            # Don't perform model validation on fields that were defined
            # manually on the form and excluded via the ModelForm's Meta
            # class. See #12901.
            elif self._meta.fields and field not in self._meta.fields:
                exclude.append(f.name)
            elif self._meta.exclude and field in self._meta.exclude:
                exclude.append(f.name)

            # Exclude fields that failed form validation. There's no need for
            # the model fields to validate them as well.
            elif field in self._errors.keys():
                exclude.append(f.name)

            # Exclude empty fields that are not required by the form, if the
            # underlying model field is required. This keeps the model field
            # from raising a required error. Note: don't exclude the field from
            # validation if the model field allows blanks. If it does, the blank
            # value may be included in a unique check, so cannot be excluded
            # from validation.
            else:
                form_field = self.fields[field]
                field_value = self.cleaned_data.get(field)
                if not f.blank and not form_field.required and field_value in form_field.empty_values:
                    exclude.append(f.name)
        return exclude 

# 需要导入模块: from django.forms.fields import Field [as 别名]
# 或者: from django.forms.fields.Field import validate [as 别名]
def save_instance(form, instance, fields=None, fail_message='saved',
                  commit=True, exclude=None, construct=True):
    """
    Saves bound Form ``form``'s cleaned_data into model instance ``instance``.

    If commit=True, then the changes to ``instance`` will be saved to the
    database. Returns ``instance``.

    If construct=False, assume ``instance`` has already been constructed and
    just needs to be saved.
    """
    if construct:
        instance = construct_instance(form, instance, fields, exclude)
    opts = instance._meta
    if form.errors:
        raise ValueError("The %s could not be %s because the data didn't"
                         " validate." % (opts.object_name, fail_message))

    # Wrap up the saving of m2m data as a function.
    def save_m2m():
        cleaned_data = form.cleaned_data
        for f in opts.many_to_many:
            if fields and f.name not in fields:
                continue
            if f.name in cleaned_data:
                f.save_form_data(instance, cleaned_data[f.name])
    if commit:
        # If we are committing, save the instance and the m2m data immediately.
        instance.save()
        save_m2m()
    else:
        # We're not committing. Add a method to the form to allow deferred
        # saving of m2m data.
        form.save_m2m = save_m2m
    return instance


# ModelForms ################################################################# 

# 需要导入模块: from django.forms.fields import Field [as 别名]
# 或者: from django.forms.fields.Field import validate [as 别名]
def _get_validation_exclusions(self):
        """
        For backwards-compatibility, several types of fields need to be
        excluded from model validation. See the following tickets for
        details: #12507, #12521, #12553
        """
        exclude = []
        # Build up a list of fields that should be excluded from model field
        # validation and unique checks.
        for f in self.instance._meta.fields:
            field = f.name
            # Exclude fields that aren't on the form. The developer may be
            # adding these values to the model after form validation.
            if field not in self.fields:
                exclude.append(f.name)

            # Don't perform model validation on fields that were defined
            # manually on the form and excluded via the ModelForm's Meta
            # class. See #12901.
            elif self._meta.fields and field not in self._meta.fields:
                exclude.append(f.name)
            elif self._meta.exclude and field in self._meta.exclude:
                exclude.append(f.name)

            # Exclude fields that failed form validation. There's no need for
            # the model fields to validate them as well.
            elif field in self._errors.keys():
                exclude.append(f.name)

            # Exclude empty fields that are not required by the form, if the
            # underlying model field is required. This keeps the model field
            # from raising a required error. Note: don't exclude the field from
            # validation if the model field allows blanks. If it does, the blank
            # value may be included in a unique check, so cannot be excluded
            # from validation.
            else:
                form_field = self.fields[field]
                field_value = self.cleaned_data.get(field, None)
                if not f.blank and not form_field.required and field_value in EMPTY_VALUES:
                    exclude.append(f.name)
        return exclude 

# 需要导入模块: from django.forms.fields import Field [as 别名]
# 或者: from django.forms.fields.Field import validate [as 别名]
def save_instance(form, instance, fields=None, fail_message='saved',
                  commit=True, exclude=None, construct=True):
    """
    Saves bound Form ``form``'s cleaned_data into model instance ``instance``.

    If commit=True, then the changes to ``instance`` will be saved to the
    database. Returns ``instance``.

    If construct=False, assume ``instance`` has already been constructed and
    just needs to be saved.
    """
    if construct:
        instance = construct_instance(form, instance, fields, exclude)
    opts = instance._meta
    if form.errors:
        raise ValueError("The %s could not be %s because the data didn't"
                         " validate." % (opts.object_name, fail_message))

    # Wrap up the saving of m2m data as a function.
    def save_m2m():
        cleaned_data = form.cleaned_data
        # Note that for historical reasons we want to include also
        # virtual_fields here. (GenericRelation was previously a fake
        # m2m field).
        for f in chain(opts.many_to_many, opts.virtual_fields):
            if not hasattr(f, 'save_form_data'):
                continue
            if fields and f.name not in fields:
                continue
            if exclude and f.name in exclude:
                continue
            if f.name in cleaned_data:
                f.save_form_data(instance, cleaned_data[f.name])
    if commit:
        # If we are committing, save the instance and the m2m data immediately.
        instance.save()
        save_m2m()
    else:
        # We're not committing. Add a method to the form to allow deferred
        # saving of m2m data.
        form.save_m2m = save_m2m
    return instance


# ModelForms #################################################################