whoosh學習（4）

建立完index object後，能夠經過write()方法，添加文檔到索引了。

writer = ix.writer()
writer.add_document(title=u"My document", content=u"This is my document!",
                    path=u"/a", tags=u"first short", icon=u"/icons/star.png")
writer.add_document(title=u"Second try", content=u"This is the second example.",
                    path=u"/b", tags=u"second short", icon=u"/icons/sheep.png")
writer.add_document(title=u"Third time's the charm", content=u"Examples are many.",
                    path=u"/c", tags=u"short", icon=u"/icons/book.png")
writer.commit()

Two important notes:

You don’t have to fill in a value for every field. Whoosh doesn’t care if you leave out a field from a document.
Indexed text fields must be passed a unicode value. Fields that are stored but not indexed (STORED field type) can be passed any pickle-able object.

If you have a text field that is both indexed and stored, you can index a unicode value but store a different object if necessary (it’s usually not, but sometimes this is really useful) using this trick:

writer.add_document(title=u"Title to be indexed", _stored_title=u"Stored title")