June 2002
Intermediate to advanced
400 pages
7h 48m
English
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Uploading and Downloading Attachments
In this revision of the online forum we'll extend the object model to accommodate post attachments and add a facility to upload and download attachments.
Modeling Attachment
To avoid complexity and for performance, we are not going to model Attachment as a separate entity. Instead, we are going to model attachments as two attributes on Post.
We do this is in spite of the fact that modeling Attachments separately may be kosher or traditional.
NOTE
Adding a data blob attribute such as an attachment to an entity would have typically affected the performance of an application. Attachments can take up a fair amount of space on a database. Therefore, fetching posts with attachments can be slow. The way around this ...
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I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
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