#2750: ManyToManyField ignores 'default' option
-------------------------------------+-------------------------------------
     Reporter:  bangcok_dangerus@…   |                    Owner:  Akshat
                                     |  verma
         Type:  Bug                  |                   Status:  assigned
    Component:  Database layer       |                  Version:  4.2
  (models, ORM)                      |
     Severity:  Normal               |               Resolution:
     Keywords:                       |             Triage Stage:  Accepted
    Has patch:  0                    |      Needs documentation:  1
  Needs tests:  1                    |  Patch needs improvement:  0
Easy pickings:  1                    |                    UI/UX:  1
-------------------------------------+-------------------------------------
Changes (by Akshat verma):

 * cc: Akshat verma (added)
 * needs_tests:  0 => 1
 * version:   => 4.2
 * easy:  0 => 1
 * needs_docs:  0 => 1
 * ui_ux:  0 => 1


Old description:

> It doesn't seem possible to use the 'default' option to pre-select values
> in the admin site for a ManyToManyField. I've tried a string value, a
> list of strings, and even (following a recommendation from someone on
> #django) passing a list of the actual objects. It would be nice to either
> have this functionality added or to update the docs to reflect the fact
> that 'default' has no effect on ManyToManyFields.
>
> -Basil

New description:

 It doesn't seem possible to use the 'default' option to pre-select values
 in the admin site for a ManyToManyField. I've tried a string value, a list
 of strings, and even (following a recommendation from someone on #django)
 passing a list of the actual objects. It would be nice to either have this
 functionality added or to update the docs to reflect the fact that
 'default' has no effect on ManyToManyFields.

 -Basil

 #you can override the init of the modelform like:

 def __init__(self, *args, **kwargs):
     if 'initial' not in kwargs:
         kwargs['initial'] = {}
     kwargs['initial'].update(product_template_admin_initial_values())
     super(ProductTemplateAdminForm, self).__init__(*args, **kwargs)
 #But that will not allow to use the request.

 #If you depend on the request you can use the admin
 get_changeform_initial_data

 def get_changeform_initial_data(self, request):
     return {'name': 'custom_initial_value'}

 #You can call a method with the request as argument and return a
 dictionary. the m2m default should be a list

--

Comment:

 #you can override the init of the modelform like:

 def __init__(self, *args, **kwargs):
     if 'initial' not in kwargs:
         kwargs['initial'] = {}
     kwargs['initial'].update(product_template_admin_initial_values())
     super(ProductTemplateAdminForm, self).__init__(*args, **kwargs)

 #But that will not allow to use the request.

 #If you depend on the request you can use the admin
 get_changeform_initial_data

 def get_changeform_initial_data(self, request):
     return {'name': 'custom_initial_value'}

 #You can call a method with the request as argument and return a
 dictionary. the m2m default should be a list

-- 
Ticket URL: <https://code.djangoproject.com/ticket/2750#comment:26>
Django <https://code.djangoproject.com/>
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