Databases
StackOverflow2013
Postsdbo
POHow to perform validation when using add() on many to many relation ships in Django?
 

Note that there are some explanatory texts on larger screens.

plurals
  1. POHow to perform validation when using add() on many to many relation ships in Django?
    primarykey
    data
    text
    <p>i have a Category model with parent/child self relation For primary category and sub categories :</p> <pre><code>class Place(models.Model): name = models.CharField(_("name"), max_length=100) categories = models.ManyToManyField("Category", verbose_name=_("categories")) class Category(models.Model): name = models.CharField(_("name"), max_length=100) parent = models.ForeignKey('self', blank=True, null=True, related_name='child_set') </code></pre> <p>i need to prevent orphans, to prevent this kind of errors (in admin web interface)</p> <pre><code>c_parent = Category(name='Restaurant') c_parent.save() c_child = Category(name="Japanese restaurant", parent=c_parent) c_child.save() place1 = Place (name="Planet sushi") place1.save() place1.categories.add(c_parent) place1.categories.add(c_child) </code></pre> <p>So now we have a new Place called "Planet sushi", it's a Restaurant (root category), and a Japanese Restaurant (sub category)</p> <p>but i want to prevent this kind of things :</p> <pre><code>place2 = Place (name="Tokyofood") place2.save() place2.categories.add(c_child) </code></pre> <p>because parent is not set, or is not the correct parent category</p> <p>where can i do form validation for the admin ? and other forms (because any user can add a new place and will have to choose correct categories for) </p>
    singulars
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. PTQuestion
    1. USe-satis
    1. USJulien
    plurals
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. PO
      singulars
      1. PTAnswer
    2. PO
      singulars
      1. PTAnswer
    1. VO
      singulars
      1. POHow to perform validation when using add() on many to many relation ships in Django?
      1. This table or related slice is empty.
      1. VTUpMod
    2. VO
      singulars
      1. POHow to perform validation when using add() on many to many relation ships in Django?
      1. This table or related slice is empty.
      1. VTUpMod
    3. VO
      singulars
      1. POHow to perform validation when using add() on many to many relation ships in Django?
      1. This table or related slice is empty.
      1. VTUpMod
    1. COi've updated my answer based on your comment
      singulars
      1. POHow to perform validation when using add() on many to many relation ships in Django?
      1. USBrandon H
 

Querying!

 
Guidance
A row detail

Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

Related data can be related in a to-one or a to-many fashion. Captions of data related in a to-many fashion link to a list view showing a filtered view of the table.

Try moving around until you find a non-empty to-many entry and click on the label to get to one. You can move back to the root by clicking on the database name in the header.

SQuiL has stopped working due to an internal error.

If you are curious you may find further information in the browser console, which is accessible through the devtools (F12).

Reload