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bgarcial
Asked: 2020-02-02 13:24:52 +0800 CST 2020-02-02 13:24:52 +0800 CST

Modifying some behaviors of the Django admin regarding its generated forms

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I have a model which I am manipulating through the Django manager.

The model and "its business logic" ask me to establish a specific behavior regarding its form to enter data. What I need to do is the following:

I have the following fields:

enter image description here

What I want to do is that when I select a name in the field Name, according to the selected value, certain information is displayed (which will also be selected) in the fields Type,Freedom Degrees

It is something similar to how when one in the registration forms, selects a country and according to that country, the departments/states/provinces appear and according to the selected ones the cities or municipalities appear.

I want to do this for the administration module that Django provides me, and I would also do it in my application itself. I know there are some things to customize the admin interface or working with ModelAdmin.form all to add behaviors

I wanted to share this concern, in case someone has done things like that and if I'm on the right track.

django

1 Answers

  1. Best Answer

    The Django Smart Select package does all the magic you're looking for.

    The example is of countries, exactly:

    class Continente(models.Model):
        nombre = models.CharField(max_length=255)

class Pais(models.Model):
        continente = models.ForeignKey(Continente)
        nombre = models.CharField(max_length=255)

class Ubicacion(models.Model):
    continente = models.ForeignKey(Continente)
    pais = models.ForeignKey(Pais)
    area = models.ForeignKey(Area)
    ciudad = models.CharField(max_length=50)
    calle = models.CharField(max_length=100)

    The package requires you to use a custom field type, which makes the package work:

    from smart_selects.db_fields import ChainedForeignKey 

class Ubicacion(models.Model)
    continente = models.ForeignKey(Continente)
    pais = ChainedForeignKey(
        Pais, 
        chained_field="continente",
        chained_model_field="continente", 
        show_all=False, 
        auto_choose=True
    )
    area = ChainedForeignKey(Area, chained_field="pais", chained_model_field="pais")
    city = models.CharField(max_length=50)
    street = models.CharField(max_length=100)

    The property chained_fieldindicates which is the binding field in the current model and which chained_model_fieldis the field in the other model.

    Just follow the installation instructions.

    1. Add smart_selectsto your INSTALLED_APPS.

    2. Create the routes in urls.pyfor smart_selectschained Select controls to work, for example:

      urlpatterns = patterns('',
    url(r'^admin/', include(admin.site.urls)),
    url(r'^chaining/', include('smart_selects.urls')),
)

    It's more complicated with Many to Many fields , but the basic operation is this.

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