Merge pull request #467 from adamsc64/doc_foreignkey_push_pull_example
Expanded example of using ListFields for one-to-many relationships.
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@ -290,6 +290,12 @@ instance of the object to the query::
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# Find all pages that both Bob and John have authored
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Page.objects(authors__all=[bob, john])
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# Remove Bob from the authors for a page.
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Page.objects(id='...').update_one(pull__authors=bob)
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# Add John to the authors for a page.
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Page.objects(id='...').update_one(push__authors=john)
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Dealing with deletion of referred documents
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'''''''''''''''''''''''''''''''''''''''''''
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