Django Model what are widgets

A Widget takes care of converting between import and export representations.

This is achieved by the two methods, clean() and render().

clean(value, row=None, *args, **kwargs)

Returns an appropriate Python object for an imported value.

For example, if you import a value from a spreadsheet, clean() handles conversion of this value into the corresponding Python object.

Numbers or dates can be cleaned to their respective data types and don’t have to be imported as Strings.

render(value, obj=None)

Returns an export representation of a Python value.

For example, if you have an object you want to export, render() takes care of converting the object’s field to a value that can be written to a spreadsheet.

The different types of available widgets are:

import_export.widgets.IntegerWidget

import_export.widgets.DecimalWidget

import_export.widgets.CharWidget

import_export.widgets.BooleanWidget

import_export.widgets.DateWidget

import_export.widgets.TimeWidget

import_export.widgets.DateTimeWidget

import_export.widgets.DurationWidget

import_export.widgets.JSONWidget

import_export.widgets.ForeignKeyWidget

Unlike specifying a related field in your resource like so

class Meta:

    fields = ('author__name',)

…using a ForeignKeyWidget has the advantage that it can not only be used for exporting, but also importing data with foreign key relationships.

from import_export import fields, resources

from import_export.widgets import ForeignKeyWidget

class BookResource(resources.ModelResource):

    author = fields.Field(

        column_name='author',

        attribute='author',

        widget=ForeignKeyWidget(Author, 'name'))

    class Meta:

        fields = ('author',)

References:

https://django-import-export.readthedocs.io/en/latest/api_widgets.html