| 1 | Index: docs/db-api.txt |
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| 2 | =================================================================== |
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| 3 | --- docs/db-api.txt (revision 7028) |
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| 4 | +++ docs/db-api.txt (working copy) |
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| 5 | @@ -225,6 +225,19 @@ |
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| 6 | |
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| 7 | Django will complain if you try to assign or add an object of the wrong type. |
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| 8 | |
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| 9 | +When you update a ``ManyToManyField``, Django will emit a signal that |
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| 10 | +provides a notification of the changes. The raised signals are: |
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| 11 | + |
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| 12 | + * **``m2m_add_items``** gets fired after new objects are added to the |
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| 13 | + ``ManyToManyField``, and passes the list of newly added objects to |
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| 14 | + listeners |
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| 15 | + * **``m2m_remove_items``** gets fired after existing objects are removed |
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| 16 | + from the ``ManyToManyField``, and passes a list of removed objects |
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| 17 | + to listeners |
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| 18 | + * **``m2m_clear_items``** gets fired before all objects are cleared |
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| 19 | + from the ``ManyToManyField``, and passes a list of the objects to be |
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| 20 | + removed to listeners |
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| 21 | + |
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| 22 | How Django knows to UPDATE vs. INSERT |
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| 23 | ------------------------------------- |
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| 24 | |
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