Commit 28acc0d6 authored by Tim Graham's avatar Tim Graham
Browse files

Fixed #26078 -- Clarified "old vs. new" in model._meta upgrade guide. 

Thanks Thomas Güttler for the suggestion.
parent 21bf685f

docs/ref/models/meta.txt

+11 −13
Original line number Diff line number Diff line
@@ -149,7 +149,7 @@ that were previously excluded - will almost certainly result in better code. 
Assuming you have a model named ``MyModel``, the following substitutions

can be made to convert your code to the new API:



* ``MyModel._meta.get_field(name)``::

* ``MyModel._meta.get_field(name)`` becomes::



      f = MyModel._meta.get_field(name)
@@ -162,10 +162,8 @@ can be made to convert your code to the new API: 
    ``get_field()`` API will find

    :class:`~django.contrib.contenttypes.fields.GenericForeignKey` relations;



* ``MyModel._meta.get_field_by_name(name)``:



  ``get_field_by_name()`` returned four values:

  ``(field, model, direct,  m2m)``:

* ``MyModel._meta.get_field_by_name(name)`` returns a tuple of these four

  values with the following replacements:



  - ``field`` can be found by ``MyModel._meta.get_field(name)``
@@ -183,7 +181,7 @@ can be made to convert your code to the new API: 
  - ``m2m`` can be found through the

    :attr:`~django.db.models.Field.many_to_many` attribute on the field.



* ``MyModel._meta.get_fields_with_model()``::

* ``MyModel._meta.get_fields_with_model()`` becomes::



      [

          (f, f.model if f.model != MyModel else None)
@@ -193,7 +191,7 @@ can be made to convert your code to the new API: 
              or (f.many_to_one and f.related_model)

      ]



* ``MyModel._meta.get_concrete_fields_with_model()``::

* ``MyModel._meta.get_concrete_fields_with_model()`` becomes::



      [

          (f, f.model if f.model != MyModel else None)
@@ -205,7 +203,7 @@ can be made to convert your code to the new API: 
          )

      ]



* ``MyModel._meta.get_m2m_with_model()``::

* ``MyModel._meta.get_m2m_with_model()`` becomes::



      [

          (f, f.model if f.model != MyModel else None)
@@ -213,14 +211,14 @@ can be made to convert your code to the new API: 
          if f.many_to_many and not f.auto_created

      ]



* ``MyModel._meta.get_all_related_objects()``::

* ``MyModel._meta.get_all_related_objects()`` becomes::



      [

          f for f in MyModel._meta.get_fields()

          if (f.one_to_many or f.one_to_one) and f.auto_created

      ]



* ``MyModel._meta.get_all_related_objects_with_model()``::

* ``MyModel._meta.get_all_related_objects_with_model()`` becomes::



      [

          (f, f.model if f.model != MyModel else None)
@@ -228,14 +226,14 @@ can be made to convert your code to the new API: 
          if (f.one_to_many or f.one_to_one) and f.auto_created

      ]



* ``MyModel._meta.get_all_related_many_to_many_objects()``::

* ``MyModel._meta.get_all_related_many_to_many_objects()`` becomes::



      [

          f for f in MyModel._meta.get_fields(include_hidden=True)

          if f.many_to_many and f.auto_created

      ]



* ``MyModel._meta.get_all_related_m2m_objects_with_model()``::

* ``MyModel._meta.get_all_related_m2m_objects_with_model()`` becomes::



      [

          (f, f.model if f.model != MyModel else None)
@@ -243,7 +241,7 @@ can be made to convert your code to the new API: 
          if f.many_to_many and f.auto_created

      ]



* ``MyModel._meta.get_all_field_names()``::

* ``MyModel._meta.get_all_field_names()`` becomes::



      from itertools import chain

      list(set(chain.from_iterable(