I have two models Category and Products.
- a Product can have multiple Categories
- a Category can have multiple Products.
- Categories have a circular Foreign key, to itself.
- not all Categories have the same depth level
Example:
Category A
- Category A_1
- category A_2
- Category A_2_1
Category B
Category C
- Category C_1
class Product:
categories = models.ManyToManyField(Category)
name = models.CharField(max_length=255)
class Category:
categories = models.ForeignKey(self)
name = models.CharField(max_length=255)
As Form I use a ModelForm:
class ProductForm(ModelForm):
class Meta:
model = Product
fields = ['categories', 'name', 'short_description',
'description']
widgets = {
'categories': MyWidget,
}
**What I want to achieve:**
I want to implement a conditional select (narow options):
1. Only top parent Categories(level 0 A,B,C) are available
2. The user select a parent Category. If the parent has children a new
Select box appear with his children(category level 1 A1,C1)
3. The user select a level 1 Category (A1,C1). If the parent has children a
new Select box appear with his children(level 2 A2)
- The process is repeated until no children are availavable(recursive), an
user select the "smallest" category in the tree
- A new button is available for the user to add more categories and start
the 1-3 process again
- I want to do the select,add new select using JavaScript
- On Form Submit I want to send only the last children categories
Options I thought:
1. Change the ManyToMany coresponding default Fields - looks like there are
no good hooks and/or inheritance
2. Use a non-default custom Field instean of ManytoMany(like Charfield) -
more complex on clean,saving Form
3. Change/Inherit the widget. My issues is how to send the data to the
default Field on submit, and get/show it on edit
I need some help as code and indication how to do this.
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