Django admin methods

Easily create admin actions methods, list field methods and model methods for Django ModelAdmin

Common usage

Use to quickly create Django admin items such as:

• "Set as published", "Set as unpublished" actions in the admin list view
• Shortened description (limit to n characters) for use in the admin list view
• Publish, Unpublish links in admin list view
• Image thumbnail in change view

Installation

pip install django-admin-methods

API

Actions

The actions module provides methods to build admin actions and should be used within a admin.ModelAdmin declaration

true_false(field_name)

Returns two functions, one to set the model's field_name as true, one as false.

Parameters

Parameter	Default	Description
field_name		the model field name
true_name	''	name for the "true" function. Defaults to "Set as field_name
false_name	''	name for the "false" function. Defaults to "Set as non field_name
true_description	''	displayed description for the "true" function. Defaults to "Set as field_name
false_description	''	displayed description for the "false" function. Defaults to "Set as non field_name

Notes

• true_name is used as the function name (make sure it is unique for this AdminModel)
• If true_description is given it will be used as the short_description value on the "true" function (which will be shown in the admin actions list).
• If no name is given, defaults to "Set as [field_name]" and *"Set as non [field_name]"
• true_name must be a string (not unicode). For translations, use true_description instead

Usage

import admin_methods.actions

class PropertyAdmin(admin.ModelAdmin):
  set_published, set_unpublished = admin_methods.actions.true_false('published')
  set_highlighted, set_unhighlighted = admin_methods.actions.true_false('highlighted')
  actions = [set_published, set_unpublished, set_highlighted, set_unhighlighted]

Results in the actions below which would set the selected items' published value to true or false

toggle(field_name, name='', description='')

Returns a function which sets the model's field_name as the opposite of its current value for each selected items.
If no name is given, defaults to "Toggle [field_name]"
If description is given it will be used as the short_description value on the function (which will be shown in the admin actions list). Otherwise name is used

Note name must be a string (not unicode). For translations, use description instead

List

The list module provides methods to create extra fields for use in the list view and should be used within a admin.ModelAdmin declaration

short_text(field_name)

Returns a function to be used as a list_display entry.

Parameters

Parameter	Default	Description
field_name		the model field name
length	200	maximum length of short text (not inclusive of suffix)
name	''	the name for the function. Will be set to the field_name if not provided. Note name must be a string (not unicode). For translations, use description instead
description	''	header title
suffix	'...'	suffix if length of short text is greater than length
strip_html	False	set true to strip html from short text

Notes

• If no name is given, field_name is used.
• You may change the suffix which will be appended to shortened text only.
• Use strip_html to remove HTML tags before length calculation
• name must be a string (not unicode). For translations, use description instead

Usage

import admin_methods.list

class PropertyAdmin(admin.ModelAdmin):
  list_display = ('shortened_text',)
  shortened_text = admin_methods.list.short_text('description', length=150, strip_html=True)

Description will be shortened to 150 characters where necessary:

Strip html transforms this

into this

count(field_name)

Returns a function that can be used to count one-to-many and many-to-many relationship on a Django admin list view.

Parameters

Parameter	Default	Description
field_name		the model field name
name	''	the name for the function. Will be set to the count_{field_name} if not provided. Note name must be a string (not unicode). For translations, use description instead
format	{}	within the list, format is used for 1 item
format_none	format	within the list, format_none is used for 0 items. If not provided, format is used
format_plural	format	within the list, format_plural is used for more than 1 items. If not provided, format is used

Notes

• If no name is given, count_field_name is used.
• Within the list, format_none is used for 0 items, format is used for 1 item and format_plural for more than 1 items. They all default to simply displaying the number of items.
• name must be a string (not unicode). For translations, use description instead

Usage

import admin_methods.list

class UnitGroupAdmin(admin.ModelAdmin):
  unit_count = admin_methods.list.count('units', format='{} unit', format_plural='{} units', format_none='Nothing')
  list_display = ('name', 'unit_count')

Result

list(related_name)

Returns a function that can be used to display a comma separated list of items.

Parameters

Parameter	Default	Description
related_name		the model's related query set name
name	''	name for the function. Defaults to list_related_name
separator	', '	separator between the values
model_attribute	None	for each model in the related queryset, call this method to get display value. If not provided, unicode() will be called. Refer to the notes below for more information
description	''	displayed description for the header. Defaults to "List of related_name
limit	None	Limit the number of results from the query set.

Notes

• Related name is expected to be the name of the related queryset manager. .all() will be called on that property
• If no name is given, list_related_name is used.
• If no model_attribute is provided, the model's __unicode__ method will be called.
• If model_attribute is a callable, it will be called for each model. Also, the function returned by list will have the same value for allow_tags as the callable, meaning that you may display html inside each list item
• If no limit is given, displays all the items
• name must be a string (not unicode). For header value, use description instead

Usage

import admin_methods.list

class UnitAdmin(admin.ModelAdmin):
    unit_tenant = admin_methods.list.list('tenants', model_attribute='name')

    list_display = ('name', 'unit_tenant',)

Result

toggle(field_name)

Important note
If you wish to us this method, either add admin_methods to your INSTALLED_APPS setting, or provide an available template

Returns a function that can be used to display a toggle link for a single field in a Django admin list view.

Parameters

Parameter	Default	Description
field_name		the model field name
url_field	None	the model field used to generate the url for the toggle link. If None, field_name_url is used
name	''	the name for the function. Will be set to the count_{field_name} if not provided. Note name must be a string (not unicode). For translations, use header_title instead
description_true	''	within the list, the text for the link when the model field is true
description_false	''	within the list, the text for the link when the model field is false
header_title	''	column title
template_path	admin_methods/list/toggle.html	the path to a template loaded via Django's templating engine. Override to use own templates

Notes

• If no name is given, toggle_field_name is used.
• If no url_field is given, field_name_url is used.
• When the boolean to be toggled is true, description_true will be used in display. This defaults to field_name.
• When the boolean to be toggled is false, description_false will be used in display. This defaults to field_name.
• name must be a string (not unicode). For header value, use header_title instead

Usage

import admin_methods.list

class UnitGroupAdmin(admin.ModelAdmin):
  unit_publish = admin_methods.list.toggle('published', description_true='Unpublish', description_false='Publish')
  list_display = ('name', 'unit_publish')

Result

Model

The model module provides methods to create extra fields for use in the add or change view and should be used within a models.Model declaration

image_thumb(field_name, name='', width=100, description=False, if_no_image='')

Returns a function to be set on a model, which can then be used in the fields and readonly_fields declaration of a ModelAdmin

Parameters

Parameter	Default	Description
field_name		the model ImageField name, or the name of a method that returns an ImageField
name	''	the name for the function. Will be set to the field_name if not provided. Note Django needs a name to detect unique methods, but you can make sure that it does not get displayed on the page by setting description to False (default)
width	100	image width
description	False	display short description or not.
description_text	''	If description is set to true, use this value as short_description. If not provided (and description is True), name will be used
if_no_image	''	value to display if no image is found
template_path	admin_methods/list/image_thumb.html	the path to a template loaded via Django's templating engine. Override to use own templates

Sample code

models.py

class Property(django.db.models.Model):
  top_image = django.db.models.ImageField(max_length=255, upload_to='properties/top')
  # Admin fields
  top_image_preview = admin_methods.model.image_thumb('top_image')

admin.py

class PropertyAdmin(admin.ModelAdmin):
  fields = ('top_image', 'top_image_preview',)
  readonly_fields = ('top_image_preview',)

Result

Dependencies

• Uses html2text for stripping html in list.short_text

Releases

###0.1.13

• [FEATURE] Added dot separated attribute
• [FEATURE] Added template in image thumb. Thanks to mbwk

###0.1.7

• [FEATURE] Added toggle in list
• [FEATURE] Added comma separated values in list
• [DOCUMENTATION] Changed example for short description to avoid confusion
• Special thanks to andybak for his suggestions

###0.1.6

• Added format parameter in count method

###0.1.5

• Added count in list module

###0.1.4

• Allow Unicode in short description

###0.1.3

Changelog

• Separated name and description in all methods. Allows to handle non-ascii translations

###0.1.2

Changelog

• Improved README

###0.1.1

Changelog

• Improved README

###0.1.0

Initial release

TODO

• Testing!