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Fixed #23354 -- Documented that ModelChoiceField to_field_name should…

… be a unique field.

Thanks Keryn Knight for the suggestion.
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commit 83762da3fbc00fdb5c6cfbcd04e25ff00c599102 1 parent 2154004
@timgraham timgraham authored
Showing with 4 additions and 2 deletions.
  1. +4 −2 docs/ref/forms/fields.txt
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6 docs/ref/forms/fields.txt
@@ -1106,8 +1106,10 @@ method::
.. attribute:: to_field_name
This optional argument is used to specify the field to use as the value
- of the choices in the field's widget. By default it is set to ``None``,
- in which case the primary key of each object will be used. For example::
+ of the choices in the field's widget. Be sure it's a unique field for
+ the model, otherwise the selected value could match more than one
+ object. By default it is set to ``None``, in which case the primary key
+ of each object will be used. For example::
# No custom to_field_name
field1 = forms.ModelChoiceField(queryset=...)

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