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Update loaders.rst

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Cyril Mouchel 2019-02-19 21:35:29 +01:00 committed by GitHub
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@ -65,7 +65,11 @@ data that will be assigned to the ``name`` field later.
Afterwards, similar calls are used for ``price`` and ``stock`` fields
(the latter using a CSS selector with the :meth:`~ItemLoader.add_css` method),
and finally the ``last_update`` field is populated directly with a literal value
(``today``) using a different method: :meth:`~ItemLoader.add_value`.
(``today``) using a different method: :meth:`~ItemLoader.add_value`. To note
:meth:`~ItemLoader.add_css` and :meth:`~ItemLoader.add_xpath` methods will always
return a list as they are actually calling selector ``getall()`` method over
``get()`` which may return a string value. Thus, input processors should be
implemented by waiting for a list instead of a single string.
Finally, when all data is collected, the :meth:`ItemLoader.load_item` method is
called which actually returns the item populated with the data