[storages] fix fs_importing side-effect on entity.data When creating a new File object, if fs_importing is set, we want entity.data to be the file content instead of the filepath for the rest of the transaction. (see test_bfss_fs_importing_transparency) for test implementation To make this possible, the storage hooks (entity_added / entity_updated) must return the correct value to set in the entity dict.

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−Schema of the data
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−First take a look at the data schema_ then try to remember that you are browsing
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−through a heap of data by applying stylesheets to the results of queries. This
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−site is not a content management system with items placed in folders. It is an
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−interface to a database which applies a view to retreived data.
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−.. _schema: schema