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Showing content from http://django-treebeard.readthedocs.io/en/latest/forms.html below:

Forms — django-treebeard 4.7 documentation

class treebeard.forms.MoveNodeForm(data=None, files=None, auto_id='id_%s', prefix=None, initial=None, error_class=<class 'django.forms.utils.ErrorList'>, label_suffix=':', empty_permitted=False, instance=None, **kwargs)¶

Bases: django.forms.models.ModelForm

Form to handle moving a node in a tree.

Handles sorted/unsorted trees.

It adds two fields to the form:

• Relative to: The target node where the current node will

  be moved to.

• Position: The position relative to the target node that

  will be used to move the node. These can be:

  • For sorted trees: Child of and Sibling of
  • For unsorted trees: First child of, Before and After

Warning

Subclassing MoveNodeForm directly is discouraged, since special care is needed to handle excluded fields, and these change depending on the tree type.

It is recommended that the movenodeform_factory() function is used instead.

treebeard.forms.movenodeform_factory(model, form=<class 'treebeard.forms.MoveNodeForm'>, fields=None, exclude=None, formfield_callback=None, widgets=None)¶

Dynamically build a MoveNodeForm subclass with the proper Meta.

Parameters:

• model (Node) – The subclass of Node that will be handled by the form.
• form – The form class that will be used as a base. By default, MoveNodeForm will be used.

Returns:

A MoveNodeForm subclass

For a full reference of this function, please read modelform_factory()

Example, MyNode is a subclass of treebeard.al_tree.AL_Node:

MyNodeForm = movenodeform_factory(MyNode)

is equivalent to:

class MyNodeForm(MoveNodeForm):
    class Meta:
        model = models.MyNode
        exclude = ('sib_order', 'parent')

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